LBNL Physics Division Research Progress Meetings

Josh McFayden (LBNL) "Unravelling LEP-Era Lepton Flavour Universality Discrepancy with ATLAS"
2020-07-21 12:00 - 13:00 UTC | Zoom Talk, 50A-5132, Berkeley, ca, 94720
Abstract:

A remarkable feature of the Standard Model (SM) is that each lepton flavour (electron, muon, tau) is equally likely to interact with a W boson. This is known as Lepton Flavour Universality.

In a recent ATLAS measurement, a novel technique using events with top-quark pairs has been exploited to test the ratio of the probabilities for tau leptons and muons to be produced in W boson decays, R(τ/μ).

In the SM, R(τ/μ) is expected to be unity, but a longstanding tension with this prediction has existed since the LEP era, where, from a combination of experiments, R(τ/μ) was measured to be 2.7σ higher than the SM expectation.

If the LEP result were confirmed to O(1%) precision it would correspond to an unambiguous discovery of beyond the SM physics. This latest ATLAS measurement obtains this level a precision – please join the RPM to discover whether or not it agrees with LEP!

http://physics.lbl.gov/rpm/index.php/events/
If you are looking to confirm if there is an event, due to room reservation, please go to RPM website for a list of all scheduled talks.
──────────
Troy Cortez is inviting you to a scheduled Zoom meeting.
Join Zoom Meeting
https://lbnl.zoom.us/j/95906405235
Meeting ID: 959 0640 5235
One tap mobile
+16699006833,,95906405235# US (San Jose)
+13462487799,,95906405235# US (Houston)
Dial by your location
+1 669 900 6833 US (San Jose)
+1 346 248 7799 US (Houston)
+1 253 215 8782 US (Tacoma)
+1 301 715 8592 US (Germantown)
+1 312 626 6799 US (Chicago)
+1 646 558 8656 US (New York)
Meeting ID: 959 0640 5235
Find your local number: https://lbnl.zoom.us/u/a9dnGtb5T
Join by SIP
95906405235@zoomcrc.com
Join by H.323
162.255.37.11 (US West)
162.255.36.11 (US East)
115.114.131.7 (India Mumbai)
115.114.115.7 (India Hyderabad)
213.19.144.110 (EMEA)
103.122.166.55 (Australia)
64.211.144.160 (Brazil)
69.174.57.160 (Canada)
207.226.132.110 (Japan)
Meeting ID: 959 0640 5235
──────────

Yacine Ali-Haimoud (NYU) "Hunting for Dark Matter in the Early Universe"
2020-09-10 16:00 - 17:00 | Zoom Talk, 50A-5132, Berkeley, ca, 94720
ABSTRACT:

It is now well established that the dominant part of non-relativistic matter in the Universe is some substance which appears to be oblivious to any force but gravity. The nature of this dark matter remains a nagging puzzle, and several candidates remain in the running. For instance, dark matter might be a new particle, as light as an electron, which might weakly interact with standard particles. Or it could be partly made of primordial black holes as massive as many Suns, born in the very early Universe from the gravitational collapse of enhanced primordial fluctuations. In this talk, I will describe how one can try and tease out some of the properties of dark matter from the Cosmic Microwave Background (CMB), both through its frequency spectrum, and its angular fluctuations. After reviewing the basic physics underlying the CMB, I will highlight how it can constrain interacting particles and primordial black holes. If time allows, I will discuss what LIGO may be able to tell us about primordial-black holes.

http://physics.lbl.gov/rpm/index.php/events/

If you are looking to confirm if there is an event, due to room reservation, please go to RPM website for a list of all scheduled talks.
──────────
Troy Cortez is inviting you to a scheduled Zoom meeting.
Join Zoom Meeting
https://lbnl.zoom.us/j/91782268585
Meeting ID: 917 8226 8585
One tap mobile
+16699006833,,91782268585# US (San Jose)
+13462487799,,91782268585# US (Houston)
Dial by your location
+1 669 900 6833 US (San Jose)
+1 346 248 7799 US (Houston)
+1 253 215 8782 US (Tacoma)
+1 646 558 8656 US (New York)
+1 301 715 8592 US (Germantown)
+1 312 626 6799 US (Chicago)
Meeting ID: 917 8226 8585
Find your local number: https://lbnl.zoom.us/u/abeLb1T4q1
Join by SIP
91782268585@zoomcrc.com
Join by H.323
162.255.37.11 (US West)
162.255.36.11 (US East)
115.114.131.7 (India Mumbai)
115.114.115.7 (India Hyderabad)
213.19.144.110 (EMEA)
103.122.166.55 (Australia)
64.211.144.160 (Brazil)
69.174.57.160 (Canada)
207.226.132.110 (Japan)
Meeting ID: 917 8226 8585
──────────

Vivian Miranda (U. Arizona) "The Connected Universe: Relating Early, Intermediate and Late Universe with cosmological data"
2020-09-24 16:00 - 17:00 | Zoom Talk, 50A-5132, Berkeley, ca, 94720
Abstract:
The standard model of cosmology is built upon on a series of propositions on how the early, intermediate, and late epochs of the Universe behave. In particular, it predicts that dark energy and dark matter currently pervades the cosmos. Understanding the properties of the dark sector is plausibly the biggest challenge in theoretical physics. There is, however, a broad assumption in cosmology that the Universe on its earlier stages is fully understood and that discrepancies between the standard model of cosmology and current data are suggestive of distinct dark energy properties. Uncertainties on this hypothesis’s validity are not usually taken into account when forecasting survey capabilities, even though our investigations might be obfuscated if the intermediate and early Universe did behave abnormally. In this colloquium, I propose a program to investigate dark energy and earlier aspects of our Universe simultaneously, through space missions in the 2020s in combination with ground-based observatories. This program will help guide the strategy for the future Rubin and Roman supernovae and weak lensing surveys. My investigations on how properties of the early and intermediate Universe affect inferences on dark energy (and vice-versa) will also support community understanding of how future missions can be employed to test some of the core hypotheses of the standard model of cosmology.

http://physics.lbl.gov/rpm/index.php/events/

If you are looking to confirm if there is an event, due to room reservation, please go to RPM website for a list of all scheduled talks.
──────────
Troy Cortez is inviting you to a scheduled Zoom meeting.
Join Zoom Meeting
https://lbnl.zoom.us/j/91782268585
Meeting ID: 917 8226 8585
One tap mobile
+16699006833,,91782268585# US (San Jose)
+13462487799,,91782268585# US (Houston)
Dial by your location
+1 669 900 6833 US (San Jose)
+1 346 248 7799 US (Houston)
+1 253 215 8782 US (Tacoma)
+1 646 558 8656 US (New York)
+1 301 715 8592 US (Germantown)
+1 312 626 6799 US (Chicago)
Meeting ID: 917 8226 8585
Find your local number: https://lbnl.zoom.us/u/abeLb1T4q1
Join by SIP
91782268585@zoomcrc.com
Join by H.323
162.255.37.11 (US West)
162.255.36.11 (US East)
115.114.131.7 (India Mumbai)
115.114.115.7 (India Hyderabad)
213.19.144.110 (EMEA)
103.122.166.55 (Australia)
64.211.144.160 (Brazil)
69.174.57.160 (Canada)
207.226.132.110 (Japan)
Meeting ID: 917 8226 8585
──────────

Nan Lu (Caltech) "Evidence for Higgs Boson Decay to a Pair of Muons from the CMS Experiment "
2020-10-01 16:00 - 17:00 | Zoom Talk, 50A-5132, Berkeley, ca, 94720
Abstract:

This seminar presents the search for the rare Higgs boson decay to a pair of muons performed by the CMS experiment at the LHC, based on the full Run 2 dataset. Events are categorized based on the characteristics of major Higgs boson production mechanisms and are analyzed using machine learning techniques, which significantly boosts the sensitivity of the search. A 3.0σ excess is observed in data, constituting the first evidence for the Higgs boson coupling to muons.

http://physics.lbl.gov/rpm/index.php/events/

If you are looking to confirm if there is an event, due to room reservation, please go to RPM website for a list of all scheduled talks.
──────────
Troy Cortez is inviting you to a scheduled Zoom meeting.
Join Zoom Meeting
https://lbnl.zoom.us/j/91782268585
Meeting ID: 917 8226 8585
One tap mobile
+16699006833,,91782268585# US (San Jose)
+13462487799,,91782268585# US (Houston)
Dial by your location
+1 669 900 6833 US (San Jose)
+1 346 248 7799 US (Houston)
+1 253 215 8782 US (Tacoma)
+1 646 558 8656 US (New York)
+1 301 715 8592 US (Germantown)
+1 312 626 6799 US (Chicago)
Meeting ID: 917 8226 8585
Find your local number: https://lbnl.zoom.us/u/abeLb1T4q1
Join by SIP
91782268585@zoomcrc.com
Join by H.323
162.255.37.11 (US West)
162.255.36.11 (US East)
115.114.131.7 (India Mumbai)
115.114.115.7 (India Hyderabad)
213.19.144.110 (EMEA)
103.122.166.55 (Australia)
64.211.144.160 (Brazil)
69.174.57.160 (Canada)
207.226.132.110 (Japan)
Meeting ID: 917 8226 8585
──────────

Andrej Obuljen (Waterloo) "Anisotropic Assembly Bias in Theory, Simulations and BOSS Data"
2020-10-15 16:00 - 17:00 | Zoom Talk, 50A-5132, Berkeley, ca, 94720
ABSTRACT
Clustering of matter on large scales provides an important source of information on key cosmological parameters. To extract this information we need to understand the relation between the tracers we observe and the underlying matter field. The clustering strength of halos and galaxies on large scales is linearly biased compared to the matter clustering. This linear bias mainly depends on halo mass and redshifts, though selections based on other scalar halo properties (age, spin, concentration etc.) show additional bias dependences — called assembly bias. Furthermore, non-scalar halo properties: shapes, velocity dispersion and angular momentum, are correlated with the large-scale tidal field. Selection effects that couple to these non-scalar halo properties can produce anisotropic clustering even in real-space and act as a contaminant to redshift-space distortion measurements, through an anisotropic assembly bias (AB). I will discuss our recent results on studying the halo AB using a large number of numerical simulations. Then I will present the first detection of the galaxy anisotropic assembly bias in BOSS DR12 galaxies. Finally, I will show other consequences and future prospects.
http://physics.lbl.gov/rpm/index.php/events/
If you are looking to confirm if there is an event, due to room reservation, please go to RPM website for a list of all scheduled talks.
──────────
Troy Cortez is inviting you to a scheduled Zoom meeting.
Join Zoom Meeting
https://lbnl.zoom.us/j/91782268585
Meeting ID: 917 8226 8585
One tap mobile
+16699006833,,91782268585# US (San Jose)
+13462487799,,91782268585# US (Houston)
Dial by your location
+1 669 900 6833 US (San Jose)
+1 346 248 7799 US (Houston)
+1 253 215 8782 US (Tacoma)
+1 646 558 8656 US (New York)
+1 301 715 8592 US (Germantown)
+1 312 626 6799 US (Chicago)
Meeting ID: 917 8226 8585
Find your local number: https://lbnl.zoom.us/u/abeLb1T4q1
Join by SIP
91782268585@zoomcrc.com
Join by H.323
162.255.37.11 (US West)
162.255.36.11 (US East)
115.114.131.7 (India Mumbai)
115.114.115.7 (India Hyderabad)
213.19.144.110 (EMEA)
103.122.166.55 (Australia)
64.211.144.160 (Brazil)
69.174.57.160 (Canada)
207.226.132.110 (Japan)
Meeting ID: 917 8226 8585
──────────

Simone Pagan-Griso (LBNL) "The Future of the Energy Frontier: Highlights from the Snowmass 2021 Process"
2020-10-22 16:00 - 17:00 | Zoom Talk, 50A-5132, Berkeley, ca, 94720
Abstract:
The Snowmass process is an opportunity for the entire HEP community to come together to identify and document a vision for the future of particle physics in the U.S. and its international partners. The Snowmass 2021 process is currently ongoing and scheduled to deliver a report in the fall of 2021. The work is divided in many areas (frontiers), spanning collider-based physics, neutrino physics, and cosmology, but including dedicated theory and instrumentation areas as well.
In this seminar, I will focus on highlighting some of the ideas and plans that have been forming in the area of the energy frontier, with particular focus on prospects for direct searches of Beyond-Standard-Model physics; I will also discuss some synergies with other areas, when relevant.

Hannsjörg Weber (FNAL) "Triple Threat: The Observation of Tribosons "
2020-10-27 16:00 - 17:00
Hannsjörg Weber
Triple Threat: The observation of tribosons
Abstract:
We present the search for heavy triboson production, specifically targeting the production of WWW, WWZ, WZZ and ZZZ processes in multileptonic final states with 137/fb of data collected by the CMS detector during Run II of the LHC at a center-of-mass energy 13 TeV. The search is performed in final states with three, four, five, and six leptons (electrons or muons), or with two same-charge leptons plus two jets.
During this seminar, the physics behind the triboson process will be motivated, including a discussion on the difficulties to experimentally measure it. Then, the analysis strategy aimed to observe tribosons will be shown and the results will be presented. At the end, an outlook on future triboson studies and extensions towards probing the standard model and potential new physics will be given.

http://physics.lbl.gov/rpm/index.php/events/
If you are looking to confirm if there is an event, due to room reservation, please go to RPM website for a list of all scheduled talks.
──────────
Troy Cortez is inviting you to a scheduled Zoom meeting.
Join Zoom Meeting
https://lbnl.zoom.us/j/95906405235
Meeting ID: 959 0640 5235
One tap mobile
+16699006833,,95906405235# US (San Jose)
+13462487799,,95906405235# US (Houston)
Dial by your location
+1 669 900 6833 US (San Jose)
+1 346 248 7799 US (Houston)
+1 253 215 8782 US (Tacoma)
+1 301 715 8592 US (Germantown)
+1 312 626 6799 US (Chicago)
+1 646 558 8656 US (New York)
Meeting ID: 959 0640 5235
Find your local number: https://lbnl.zoom.us/u/a9dnGtb5T
Join by SIP
95906405235@zoomcrc.com
Join by H.323
162.255.37.11 (US West)
162.255.36.11 (US East)
115.114.131.7 (India Mumbai)
115.114.115.7 (India Hyderabad)
213.19.144.110 (EMEA)
103.122.166.55 (Australia)
64.211.144.160 (Brazil)
69.174.57.160 (Canada)
207.226.132.110 (Japan)
Meeting ID: 959 0640 5235
──────────

Donatella Lucchesi (INFN) ""Muon Collider: A Window to the Future""
2020-10-29 12:00 - 17:00 | Zoom Talk, 50A-5132, Berkeley, ca, 94720
Abstract:

Muon colliders represent a highly attractive option for future collider thanks to the possibility to reach very high center of mass energy, high luminosity with reasonable costs and dimensions. Nevertheless, the feasibility is not yet fully demonstrated and presents several challenges: muon beams production and operations from the machine side and beam-induced background mitigation on the detector part. Several progress have been achieved in the last years allowing to re-open the muon collider case. The detailed study of the beam-induced background has demonstrated that even the most challenging events like those involving b-jets can be efficiently reconstructed. This has triggered the study of several Higgs related processes in particular the double and triple Higgs production with sufficient precision to fully determine the Higgs potential. In the seminar a brief description of the machine will be followed by a discussion on the performance on detector and Higgs reconstruction.

http://physics.lbl.gov/rpm/index.php/events/
If you are looking to confirm if there is an event, due to room reservation, please go to RPM website for a list of all scheduled talks.
──────────
Troy Cortez is inviting you to a scheduled Zoom meeting.
Join Zoom Meeting
https://lbnl.zoom.us/j/91782268585
Meeting ID: 917 8226 8585
One tap mobile
+16699006833,,91782268585# US (San Jose)
+13462487799,,91782268585# US (Houston)
Dial by your location
+1 669 900 6833 US (San Jose)
+1 346 248 7799 US (Houston)
+1 253 215 8782 US (Tacoma)
+1 646 558 8656 US (New York)
+1 301 715 8592 US (Germantown)
+1 312 626 6799 US (Chicago)
Meeting ID: 917 8226 8585
Find your local number: https://lbnl.zoom.us/u/abeLb1T4q1
Join by SIP
91782268585@zoomcrc.com
Join by H.323
162.255.37.11 (US West)
162.255.36.11 (US East)
115.114.131.7 (India Mumbai)
115.114.115.7 (India Hyderabad)
213.19.144.110 (EMEA)
103.122.166.55 (Australia)
64.211.144.160 (Brazil)
69.174.57.160 (Canada)
207.226.132.110 (Japan)
Meeting ID: 917 8226 8585
──────────

Jesse Thaler (MIT) "The Hidden Geometry of Particle Collisions"
2020-11-05 16:00 - 17:00 | Zoom Talk, 50A-5132, Berkeley, ca, 94720
ABSTRACT:

In this talk, I explain how various concepts and techniques in quantum field theory and collider physics can be naturally translated into a new geometric language. Using the energy mover’s distance, which quantifies the minimal amount of “work” required to rearrange one event into another, we can define a distance between pairs of collider events. This distance can then be used to triangulate the “space” of collider events and rigorously define various geometric objects. Many well-known collider observables, jet algorithms, and pileup mitigation schemes have a simple geometric interpretation, as does the important concept of infrared and collinear safety. Intriguingly, these ideas can be lifted from a distance between events into a distance between theories, with potential relevance for visualizing and interpreting data from the LHC.

http://physics.lbl.gov/rpm/index.php/events/

If you are looking to confirm if there is an event, due to room reservation, please go to RPM website for a list of all scheduled talks.
──────────
Troy Cortez is inviting you to a scheduled Zoom meeting.
Join Zoom Meeting
https://lbnl.zoom.us/j/91782268585
Meeting ID: 917 8226 8585
One tap mobile
+16699006833,,91782268585# US (San Jose)
+13462487799,,91782268585# US (Houston)
Dial by your location
+1 669 900 6833 US (San Jose)
+1 346 248 7799 US (Houston)
+1 253 215 8782 US (Tacoma)
+1 646 558 8656 US (New York)
+1 301 715 8592 US (Germantown)
+1 312 626 6799 US (Chicago)
Meeting ID: 917 8226 8585
Find your local number: https://lbnl.zoom.us/u/abeLb1T4q1
Join by SIP
91782268585@zoomcrc.com
Join by H.323
162.255.37.11 (US West)
162.255.36.11 (US East)
115.114.131.7 (India Mumbai)
115.114.115.7 (India Hyderabad)
213.19.144.110 (EMEA)
103.122.166.55 (Australia)
64.211.144.160 (Brazil)
69.174.57.160 (Canada)
207.226.132.110 (Japan)
Meeting ID: 917 8226 8585
──────────

Matt Klein (Michigan) "Search for Higgs boson decays to bottom quarks in the vector boson fusion production mode"
2020-12-03 16:00 - 17:00
ABSTRACT:
The Higgs boson is expected to decay to bb approximately 58% of the time. Despite the large branching fraction, due to the large background from SM events with b-jets, measuring this decay has been less precise than other, less frequent, decays. Measuring H(bb) in the VBF production mode has historically been insensitive, but developments in the background estimates and discrimination, as well as improvements in the signal extraction techniques, have resulted in an observed (expected) significance of 3.0 (3.0) standard deviations from the background-only hypothesis using the LHC Run 2 dataset.

http://physics.lbl.gov/rpm/index.php/events/
If you are looking to confirm if there is an event, due to room reservation, please go to RPM website for a list of all scheduled talks.
──────────
Troy Cortez is inviting you to a scheduled Zoom meeting.
Join Zoom Meeting
https://lbnl.zoom.us/j/91782268585
Meeting ID: 917 8226 8585
One tap mobile
+16699006833,,91782268585# US (San Jose)
+13462487799,,91782268585# US (Houston)
Dial by your location
+1 669 900 6833 US (San Jose)
+1 346 248 7799 US (Houston)
+1 253 215 8782 US (Tacoma)
+1 646 558 8656 US (New York)
+1 301 715 8592 US (Germantown)
+1 312 626 6799 US (Chicago)
Meeting ID: 917 8226 8585
Find your local number: https://lbnl.zoom.us/u/abeLb1T4q1
Join by SIP
91782268585@zoomcrc.com
Join by H.323
162.255.37.11 (US West)
162.255.36.11 (US East)
115.114.131.7 (India Mumbai)
115.114.115.7 (India Hyderabad)
213.19.144.110 (EMEA)
103.122.166.55 (Australia)
64.211.144.160 (Brazil)
69.174.57.160 (Canada)
207.226.132.110 (Japan)
Meeting ID: 917 8226 8585
──────────

Zhicai Zhang (CalTech) "Search for Long-Lived Particles with Precision Timing Detectors"
2020-12-08 16:00 - 17:00 | Zoom Talk, 50A-5132, Berkeley, ca, 94720
Abstract:
Searching for new physics beyond the standard model (BSM) has been one of the main goals of the LHC. With no new physics found in many SUSY and Exotica searches for prompt BSM particles from the LHC data, I will present a new BSM search approach that is looking for new particles with a long lifetime. The search is looking for SUSY long-lived particles that decay to photons, with the final state photon being time-delayed compared to prompt photon background. The search relies on the precise measurement of the photon arrival time at the calorimeter, and I will present the study of the timing performance of current CMS ECAL, and also developments of future precision timing detectors to be installed for CMS Phase 2 upgrade as well as precision timing detectors for future experiments.
http://physics.lbl.gov/rpm/index.php/events/
If you are looking to confirm if there is an event, due to room reservation, please go to RPM website for a list of all scheduled talks.

Aniruddha Bapat (University of Maryland, College Park) "Variational Quantum Optimization in the NISQ Era"
2020-12-15 16:00 - 17:00 | Zoom Talk, 50A-5132, Berkeley, ca, 94720
ABSTRACT:

Quantum information science in the coming decade will likely be carried out on noisy devices consisting of ~100-1000 qubits that do not share full interconnectivity. In this so-called NISQ regime, variational quantum algorithms, which tackle a wide range of problems from areas such as combinatorial optimization, quantum chemistry, and high-energy physics, provide a path to practical quantum advantage. In this talk, I will present some of our recent work that explores the theory behind variational algorithms such as quantum annealing and quantum approximate approximation algorithm (QAOA) using tools from optimal control theory. Then, I will discuss our work on finding the ground state of a critical Ising model on a trapped-ion quantum simulator, and the underlying optimization strategy. Finally, I will mention applications of our ideas and upcoming work.

http://physics.lbl.gov/rpm/index.php/events/
If you are looking to confirm if there is an event, due to room reservation, please go to RPM website for a list of all scheduled talks.
──────────
Troy Cortez is inviting you to a scheduled Zoom meeting.
Join Zoom Meeting
https://lbnl.zoom.us/j/93701922305
Meeting ID: 937 0192 2305
One tap mobile
+16699006833,,93701922305# US (San Jose)
+13462487799,,93701922305# US (Houston)
Dial by your location
+1 669 900 6833 US (San Jose)
+1 346 248 7799 US (Houston)
+1 253 215 8782 US (Tacoma)
+1 312 626 6799 US (Chicago)
+1 646 558 8656 US (New York)
+1 301 715 8592 US (Washington D.C)
Meeting ID: 937 0192 2305
Find your local number: https://lbnl.zoom.us/u/abZEZ2imIY
Join by SIP
93701922305@zoomcrc.com
Join by H.323
162.255.37.11 (US West)
162.255.36.11 (US East)
115.114.131.7 (India Mumbai)
115.114.115.7 (India Hyderabad)
213.19.144.110 (Amsterdam Netherlands)
213.244.140.110 (Germany)
103.122.166.55 (Australia)
64.211.144.160 (Brazil)
69.174.57.160 (Canada)
207.226.132.110 (Japan)
Meeting ID: 937 0192 2305
──────────

Michael Kreshchuk (Tuft University) "Quantum simulation of relativistic field theories in the front form"
2020-12-17 16:00 - 17:00 | Zoom Talk, 50A-5132, Berkeley, ca, 94720
Abstract:
I will talk about quantum simulation algorithms based on the light-front formulation of quantum field theory. They will range from
ab initio simulations with nearly optimal resource scalings to VQE-inspired methods available for existing devices.My work is greatly inspired by the analogy, first noted by Kenneth Wilson, between the light-front formulation of QFT and quantum
chemistry. The approach I develop to simulating field theory is an alternative to lattice techniques; it allows one to use methods
developed for quantum simulation of quantum chemistry.

http://physics.lbl.gov/rpm/index.php/events/

If you are looking to confirm if there is an event, due to room reservation, please go to RPM website for a list of all scheduled talks.
──────────
Troy Cortez is inviting you to a scheduled Zoom meeting.
Join Zoom Meeting
https://lbnl.zoom.us/j/91625177639
Meeting ID: 916 2517 7639
One tap mobile
+16699006833,,91625177639# US (San Jose)
+13462487799,,91625177639# US (Houston)
Dial by your location
+1 669 900 6833 US (San Jose)
+1 346 248 7799 US (Houston)
+1 253 215 8782 US (Tacoma)
+1 312 626 6799 US (Chicago)
+1 646 558 8656 US (New York)
+1 301 715 8592 US (Washington D.C)
Meeting ID: 916 2517 7639
Find your local number: https://lbnl.zoom.us/u/adsFO9iBos
Join by SIP
91625177639@zoomcrc.com
Join by H.323
162.255.37.11 (US West)
162.255.36.11 (US East)
115.114.131.7 (India Mumbai)
115.114.115.7 (India Hyderabad)
213.19.144.110 (Amsterdam Netherlands)
213.244.140.110 (Germany)
103.122.166.55 (Australia)
64.211.144.160 (Brazil)
69.174.57.160 (Canada)
207.226.132.110 (Japan)
Meeting ID: 916 2517 7639
──────────

Xinran Li (Princeton University) "The energy resolution and the energy deposition processes in noble liquid dark matter detectors"
2021-01-05 16:00 - 17:00 | Zoom Talk, 50A-5132, Berkeley, ca, 94720
Abstract:

Noble liquid detectors, especially liquid argon and liquid xenon time projection chambers (TPCs) have been developed and improved during the last decades. They produced the best limits in the search for one of the best motivated dark matter candidates, weakly interacting massive particles (WIPMs), in the O(10)GeV to O(10)TeV mass region. I’ll first talk about the DarkSide-50 low mass analysis which produced the best limit of 5$times$10^{-42} cm^2 on spin-independent dark matter nuclear scattering cross section for dark matter masses around 3 GeV. The detector energy resolution around the analysis threshold strongly affects the shape of the limit curve in the low mass region. One main contribution to the energy resolution comes from the intrinsic fluctuations during the energy deposition processes, including the quenching processes and the charge recombination, in noble liquids. Extending to different materials, I’ll also mention the scintillation in xenon doped liquid argon, and the recombination in amorphous selenium. The energy resolution can be improved with sensitivity to the quenched heat energy. Superfluid helium 4 detectors have been proposed to probe nuclear recoil dark matter masses as low as O(10)MeV with current technology. The compatibility with phonon sensors permits sensitivity to all energy deposition channels in superfluid helium.

http://physics.lbl.gov/rpm/index.php/events/
If you are looking to confirm if there is an event, due to room reservation, please go to RPM website for a list of all scheduled talks.
──────────
Troy Cortez is inviting you to a scheduled Zoom meeting.
Join Zoom Meeting
https://lbnl.zoom.us/j/92548118001
Meeting ID: 925 4811 8001
One tap mobile
+16699006833,,92548118001# US (San Jose)
+13462487799,,92548118001# US (Houston)
Dial by your location
+1 669 900 6833 US (San Jose)
+1 346 248 7799 US (Houston)
+1 253 215 8782 US (Tacoma)
+1 301 715 8592 US (Washington D.C)
+1 312 626 6799 US (Chicago)
+1 646 558 8656 US (New York)
Meeting ID: 925 4811 8001
Find your local number: https://lbnl.zoom.us/u/aebrpK1L6a
Join by SIP
92548118001@zoomcrc.com
Join by H.323
162.255.37.11 (US West)
162.255.36.11 (US East)
115.114.131.7 (India Mumbai)
115.114.115.7 (India Hyderabad)
213.19.144.110 (Amsterdam Netherlands)
213.244.140.110 (Germany)
103.122.166.55 (Australia)
64.211.144.160 (Brazil)
69.174.57.160 (Canada)
207.226.132.110 (Japan)
Meeting ID: 925 4811 8001
──────────

Dylan Temples (Northwestern University) New Directions in Liquid Noble Dark Matter Searches: Probing the Sub-GeV Regime
2021-01-07 16:00 - 17:00 | Zoom Talk, 50A-5132, Berkeley, ca, 94720
Abstract:

The most sensitive searches for dark matter (DM) with mass above ~10 GeV/c2 use the dual-phase xenon time-projection chamber (LXe-TPC) technology. In the U.S., development of this technology is spearheaded by the LUX-ZEPLIN experiment, with first science data coming soon. As these detectors increase in scale and sensitivity, previously negligible backgrounds become important to understand, both to prevent false discovery claims and to accurately measure the ultimate DM sensitivity of such an experiment. In this talk, I will discuss one class of such backgrounds: neutrinos scattering from the inner-shell electrons of a xenon atom. This process has heretofore gone uncalibrated, and due to its distinct event topology, is more akin to a nuclear recoil (potential DM signal) than an electron recoil (background). I will also discuss two liquid-noble technologies for searching for dark matter below ~5 GeV/c2: light-element doping, and superfluid helium detectors. Doping an LXe-TPC with low concentrations of light elements, such as hydrogen, enables sensitivity to dark matter models with mass down to 20 MeV/c2 while simultaneously probing spin-dependent DM-nucleon coupling. Superfluid helium detectors offer a complementary DM search avenue, as it is more sensitive to low-mass spin-independent DM than hydrogen-doping, but cannot investigate spin-dependent coupling.

http://physics.lbl.gov/rpm/index.php/events/
If you are looking to confirm if there is an event, due to room reservation, please go to RPM website for a list of all scheduled talks.
──────────
Troy Cortez is inviting you to a scheduled Zoom meeting.
Join Zoom Meeting
https://lbnl.zoom.us/j/98616683565
Meeting ID: 986 1668 3565
One tap mobile
+16699006833,,98616683565# US (San Jose)
+13462487799,,98616683565# US (Houston)
Dial by your location
+1 669 900 6833 US (San Jose)
+1 346 248 7799 US (Houston)
+1 253 215 8782 US (Tacoma)
+1 301 715 8592 US (Washington D.C)
+1 312 626 6799 US (Chicago)
+1 646 558 8656 US (New York)
Meeting ID: 986 1668 3565
Find your local number: https://lbnl.zoom.us/u/aeitM56qYB
Join by SIP
98616683565@zoomcrc.com
Join by H.323
162.255.37.11 (US West)
162.255.36.11 (US East)
115.114.131.7 (India Mumbai)
115.114.115.7 (India Hyderabad)
213.19.144.110 (Amsterdam Netherlands)
213.244.140.110 (Germany)
103.122.166.55 (Australia)
64.211.144.160 (Brazil)
69.174.57.160 (Canada)
207.226.132.110 (Japan)
Meeting ID: 986 1668 3565
──────────

Digvijay Wadekar (New York University) "Accelerating analysis of cosmological surveys with novel analytic methods and machine learning"
2021-01-12 16:00 - 17:00 | Zoom Talk, 50A-5132, Berkeley, ca, 94720
– Abstract:

In order to infer cosmological parameters from data of upcoming surveys like DESI, we will use summary statistics such as the power spectrum. An accurate estimate of their covariance matrix is crucial for the inference analysis. The traditional process of obtaining the covariance involves thousands of expensive mock simulations. I will present a novel analytic approach to calculate the covariance which is faster by more than four orders of magnitude. I will demonstrate the validation of our analytic approach with an analysis of the BOSS DR12 data and also show that it helps reduce the systematic error budget of cosmological constraints, thus making our approach useful for upcoming high-precision surveys like the Rubin observatory and DESI.

In the second part of my talk, I will present machine learning methods to emulate expensive hydrodynamical simulations and make cheap and accurate synthetic catalogs, which are needed for modeling non-linear scales in galaxy and line intensity mapping surveys.

http://physics.lbl.gov/rpm/index.php/events/
If you are looking to confirm if there is an event, due to room reservation, please go to RPM website for a list of all scheduled talks.
──────────
Troy Cortez is inviting you to a scheduled Zoom meeting.
Join Zoom Meeting
https://lbnl.zoom.us/j/99887141178
Meeting ID: 998 8714 1178
One tap mobile
+16699006833,,99887141178# US (San Jose)
+12532158782,,99887141178# US (Tacoma)
Dial by your location
+1 669 900 6833 US (San Jose)
+1 253 215 8782 US (Tacoma)
+1 346 248 7799 US (Houston)
+1 301 715 8592 US (Washington D.C)
+1 312 626 6799 US (Chicago)
+1 646 558 8656 US (New York)
Meeting ID: 998 8714 1178
Find your local number: https://lbnl.zoom.us/u/aeqjQRsmD
Join by SIP
99887141178@zoomcrc.com
Join by H.323
162.255.37.11 (US West)
162.255.36.11 (US East)
115.114.131.7 (India Mumbai)
115.114.115.7 (India Hyderabad)
213.19.144.110 (Amsterdam Netherlands)
213.244.140.110 (Germany)
103.122.166.55 (Australia)
64.211.144.160 (Brazil)
69.174.57.160 (Canada)
207.226.132.110 (Japan)
Meeting ID: 998 8714 1178
──────────

Etienne Dreyer (Simon Fraser University) Searching for new physics using high-energy lepton pairs and some other hot topics in ATLAS
2021-01-13 15:00 - 16:00 | Zoom Talk, 50A-5132, Berkeley, ca, 94720
Abstract:
What is the nature of dark matter? What leads to the fundamental forces having such disparate strengths? Can we explain the small mass of the Higgs boson without excessive fine tuning? These outstanding questions are part of a broad motivation to continue investigating new physics scenarios beyond the Standard Model (SM). Several theoretical solutions propose an extended gauge symmetry group beyond the SM, and hence predict the existence of additional massive gauge bosons. I will discuss the latest search for a new neutral boson producing the particularly clean signature of two high energy leptons in the ATLAS detector.
In the second part of the talk I will share my ambitions for ongoing and future research in machine learning applications to particle physics, testing the SM in strategic connections to the Higgs boson, and work on the ATLAS Inner Tracker (ITk) upgrade.
http://physics.lbl.gov/rpm/index.php/events/
If you are looking to confirm if there is an event, due to room reservation, please go to RPM website for a list of all scheduled talks.
──────────
Troy Cortez is inviting you to a scheduled Zoom meeting.
Join Zoom Meeting
https://lbnl.zoom.us/j/93348407663
Meeting ID: 933 4840 7663
One tap mobile
+16699006833,,93348407663# US (San Jose)
+13462487799,,93348407663# US (Houston)
Dial by your location
+1 669 900 6833 US (San Jose)
+1 346 248 7799 US (Houston)
+1 253 215 8782 US (Tacoma)
+1 312 626 6799 US (Chicago)
+1 646 558 8656 US (New York)
+1 301 715 8592 US (Washington D.C)
Meeting ID: 933 4840 7663
Find your local number: https://lbnl.zoom.us/u/ac8IBQ41t0
Join by SIP
93348407663@zoomcrc.com
Join by H.323
162.255.37.11 (US West)
162.255.36.11 (US East)
115.114.131.7 (India Mumbai)
115.114.115.7 (India Hyderabad)
213.19.144.110 (Amsterdam Netherlands)
213.244.140.110 (Germany)
103.122.166.55 (Australia)
64.211.144.160 (Brazil)
69.174.57.160 (Canada)
207.226.132.110 (Japan)
Meeting ID: 933 4840 7663
──────────

Nandita Khetan (Gran Sasso Science Institute) "Cosmology in the multi-messenger era"
2021-01-14 16:00 - 17:00 | Zoom Talk, 50A-5132, Berkeley, ca, 94720
Abstract:
The talk will present my PhD project research which focuses on advancing the standardization of various transients to be used as cosmological probes and the evaluation of the Hubble constant (H0). With SN Ia, I will present interesting results coming from a recent work where I used an alternate way to calibrate SN Ia based on the surface brightness fluctuations (SBF) method. Besides SNe Ia, I explored other exotic/new transients like Superluminous supernovae, Kilonovae and Gravitational waves as distance indicators. In particular, I worked on SLSNe in rest frame UV wavelengths to find peak luminosity correlations with light curve properties. I participated in a project exploring KNe as a standard candle to perform independent measurements of H0. I am currently working on the prospects of calibrating SNe Ia with GW distances measured from future GW detectors. I will briefly present these cosmological probes and discuss their future perspectives.

http://physics.lbl.gov/rpm/index.php/events/
If you are looking to confirm if there is an event, due to room reservation, please go to RPM website for a list of all scheduled talks.
──────────
Troy Cortez is inviting you to a scheduled Zoom meeting.
Join Zoom Meeting
https://lbnl.zoom.us/j/94818263036
Meeting ID: 948 1826 3036
One tap mobile
+16699006833,,94818263036# US (San Jose)
+12532158782,,94818263036# US (Tacoma)
Dial by your location
+1 669 900 6833 US (San Jose)
+1 253 215 8782 US (Tacoma)
+1 346 248 7799 US (Houston)
+1 312 626 6799 US (Chicago)
+1 646 558 8656 US (New York)
+1 301 715 8592 US (Washington D.C)
Meeting ID: 948 1826 3036
Find your local number: https://lbnl.zoom.us/u/a9sKBohim
Join by SIP
94818263036@zoomcrc.com
Join by H.323
162.255.37.11 (US West)
162.255.36.11 (US East)
115.114.131.7 (India Mumbai)
115.114.115.7 (India Hyderabad)
213.19.144.110 (Amsterdam Netherlands)
213.244.140.110 (Germany)
103.122.166.55 (Australia)
64.211.144.160 (Brazil)
69.174.57.160 (Canada)
207.226.132.110 (Japan)
Meeting ID: 948 1826 3036
──────────

Special RPM-Berkeley Cosmology Seminar | Sihan Yuan (Harvard University) Tackling the challenges of galaxy-dark matter connection modeling and secondary bias
2021-01-19 13:10 - 14:10 | Zoom Talk, 50A-5132, Berkeley, ca, 94720
Abstract:
Modeling galaxy-dark matter connection is essential in deriving unbiased cosmological constraints from galaxy clustering observations. We show that a more physically motivated galaxy-dark matter incorporating secondary biases can result in more accurate predictions of galaxy clustering, and that it significantly reduces the tension in galaxy lensing. We further present progress in building a galaxy-dark matter connection framework that is rich in features and highly efficient in evaluation, enabling more robust cosmological analyses with upcoming DESI data.

──────────
Troy Cortez is inviting you to a scheduled Zoom meeting.
Join Zoom Meeting
https://lbnl.zoom.us/j/97518801157
Meeting ID: 975 1880 1157
One tap mobile
+16699006833,,97518801157# US (San Jose)
+13462487799,,97518801157# US (Houston)
Dial by your location
+1 669 900 6833 US (San Jose)
+1 346 248 7799 US (Houston)
+1 253 215 8782 US (Tacoma)
+1 646 558 8656 US (New York)
+1 301 715 8592 US (Washington D.C)
+1 312 626 6799 US (Chicago)
Meeting ID: 975 1880 1157
Find your local number: https://lbnl.zoom.us/u/adtjQZqJZT
Join by SIP
97518801157@zoomcrc.com
Join by H.323
162.255.37.11 (US West)
162.255.36.11 (US East)
115.114.131.7 (India Mumbai)
115.114.115.7 (India Hyderabad)
213.19.144.110 (Amsterdam Netherlands)
213.244.140.110 (Germany)
103.122.166.55 (Australia)
64.211.144.160 (Brazil)
69.174.57.160 (Canada)
207.226.132.110 (Japan)
Meeting ID: 975 1880 1157
──────────

Kevin Woods (Stony Brook University) "Measuring neutrino oscillations with accelerator-based, long-baseline experiments"
2021-01-19 16:00 - 17:00 | Zoom Talk, 50A-5132, Berkeley, ca, 94720
Abstract:

Accelerator-based, long-baseline neutrino oscillation experiments are uniquely positioned to explore the CP-violating nature of the neutrino sector. This talk will briey discuss the experimental technique before surveying selected topics spanning both current and future generations of such experiments. First, the Bayesian Markov Chain Monte Carlo oscillation analysis of the T2K experiment, which has been accumulating data for the past 10 years, will be presented before discussing the ongoing efforts to extend the analysis framework to be used in a joint analysis between T2K and the NOA experiment at Fermilab. The experience obtained from these experiments already in the data taking stages has been and will continue to be invaluable in the design of future experiments, such as the Deep Underground Neutrino Experiment (DUNE). The DUNE collaboration will employ the liquid argon time projection chamber (LArTPC) technology at an unprecedented scale to measure neutrino interactions at its far site. The talk will conclude with an overview of the realization and operation of the protoDUNE-SP detector, a prototype for a DUNE far detector module, for a charged particle test beam run that took place at CERN in the end of 2018

http://physics.lbl.gov/rpm/index.php/events/
If you are looking to confirm if there is an event, due to room reservation, please go to RPM website for a list of all scheduled talks.
──────────
Troy Cortez is inviting you to a scheduled Zoom meeting.
Join Zoom Meeting
https://lbnl.zoom.us/j/97143316113
Meeting ID: 971 4331 6113
One tap mobile
+16699006833,,97143316113# US (San Jose)
+13462487799,,97143316113# US (Houston)
Dial by your location
+1 669 900 6833 US (San Jose)
+1 346 248 7799 US (Houston)
+1 253 215 8782 US (Tacoma)
+1 301 715 8592 US (Washington D.C)
+1 312 626 6799 US (Chicago)
+1 646 558 8656 US (New York)
Meeting ID: 971 4331 6113
Find your local number: https://lbnl.zoom.us/u/ad5JPUF20z
Join by SIP
97143316113@zoomcrc.com
Join by H.323
162.255.37.11 (US West)
162.255.36.11 (US East)
115.114.131.7 (India Mumbai)
115.114.115.7 (India Hyderabad)
213.19.144.110 (Amsterdam Netherlands)
213.244.140.110 (Germany)
103.122.166.55 (Australia)
64.211.144.160 (Brazil)
69.174.57.160 (Canada)
207.226.132.110 (Japan)
Meeting ID: 971 4331 6113
──────────

Kathryn Sutton (Columbia University Department of Physics) "MicroBooNE's Search for a Photon-Like Low Energy Excess"
2021-01-21 16:00 - 17:00 | Zoom Talk, 50A-5132, Berkeley, ca, 94720
Abstract:

MicroBooNE is a Liquid Argon Time Projection Chamber (LArTPC) detector and is the first of three such detectors to be commissioned as part of the Short Baseline Neutrino (SBN) program at Fermilab (FNAL), and has been taking data since 2015. One of its primary goals is to investigate the unexplained excess of electromagnetic events in the lowest energy ranges observed in the same neutrino beamline at the MiniBooNE experiment. While one leading interpretation of this anomaly is electron neutrino appearance due to sterile neutrino oscillations, a viable Standard Model explanation is neutrino-induced single photon events. The MicroBooNE single photon analysis looks to test this interpretation by measuring the rate of neutrino-induced resonant neutral current (NC) delta baryon production and subsequent delta radiative decay with a single photon in the final state, NC Δ→N𝛾. This measurement of a process that has never been observed before is projected to improve upon the current experimental limit from T2K by greater than a factor of thirty. This talk will present the status of the MicroBooNE single photon search, as well as ongoing work to create a more complete picture of single photon production in the SBN program.

http://physics.lbl.gov/rpm/index.php/events/
If you are looking to confirm if there is an event, due to room reservation, please go to RPM website for a list of all scheduled talks.
──────────
Troy Cortez is inviting you to a scheduled Zoom meeting.
Join Zoom Meeting
https://lbnl.zoom.us/j/98026016121
Meeting ID: 980 2601 6121
One tap mobile
+16699006833,,98026016121# US (San Jose)
+13462487799,,98026016121# US (Houston)
Dial by your location
+1 669 900 6833 US (San Jose)
+1 346 248 7799 US (Houston)
+1 253 215 8782 US (Tacoma)
+1 301 715 8592 US (Washington D.C)
+1 312 626 6799 US (Chicago)
+1 646 558 8656 US (New York)
Meeting ID: 980 2601 6121
Find your local number: https://lbnl.zoom.us/u/abAl5nOK8c
Join by SIP
98026016121@zoomcrc.com
Join by H.323
162.255.37.11 (US West)
162.255.36.11 (US East)
115.114.131.7 (India Mumbai)
115.114.115.7 (India Hyderabad)
213.19.144.110 (Amsterdam Netherlands)
213.244.140.110 (Germany)
103.122.166.55 (Australia)
64.211.144.160 (Brazil)
69.174.57.160 (Canada)
207.226.132.110 (Japan)
Meeting ID: 980 2601 6121
──────────

SPECIAL RPM-Berkeley Cosmology Seminar | Noah Weaverdyck (University of Michigan) "Controlling Systematics in Large-Scale Structure Surveys"
2021-01-26 13:10 - 14:10 | Zoom Talk, 50A-5132, Berkeley, ca, 94720
Abstract:
Large-scale structure (LSS) surveys have exploded in size over the last few decades, cataloguing the locations and shapes of hundreds of millions of galaxies. The unprecedented precision enabled by such datasets puts extraordinary demands on the control of systematic errors. In this talk, I will discuss how extracting information from LSS surveys is complicated by systematics that enter the survey selection function, outline several approaches to address these systematics, and highlight important lessons for upcoming surveys.

──────────
Troy Cortez is inviting you to a scheduled Zoom meeting.Join Zoom Meeting
https://lbnl.zoom.us/j/91399869562
Meeting ID: 913 9986 9562
One tap mobile
+16699006833,,91399869562# US (San Jose)
+12532158782,,91399869562# US (Tacoma)
Dial by your location
+1 669 900 6833 US (San Jose)
+1 253 215 8782 US (Tacoma)
+1 346 248 7799 US (Houston)
+1 646 558 8656 US (New York)
+1 301 715 8592 US (Washington D.C)
+1 312 626 6799 US (Chicago)
Meeting ID: 913 9986 9562
Find your local number: https://lbnl.zoom.us/u/akhID8uDJ
Join by SIP
91399869562@zoomcrc.com
Join by H.323
162.255.37.11 (US West)
162.255.36.11 (US East)
115.114.131.7 (India Mumbai)
115.114.115.7 (India Hyderabad)
213.19.144.110 (Amsterdam Netherlands)
213.244.140.110 (Germany)
103.122.166.55 (Australia)
64.211.144.160 (Brazil)
69.174.57.160 (Canada)
207.226.132.110 (Japan)
Meeting ID: 913 9986 9562
──────────

Vinicius Mikuni (University of Zurich) "Machine learning as a tool for Standard Model measurements."
2021-01-26 16:00 - 17:00 | Zoom Talk, 50A-5132, Berkeley, ca, 94720
Abstract:
The Standard Model of particle physics described the interactions between the elementary particles that compose our universe. To study these interactions, protons collide at very high energies at the Large Hadron Collider, generating hundreds of particles through every bunch crossing. In this talk, I will present two measurements that probe different aspects of the Standard Model: the determination of the ttbb and bbH(bb) cross sections. I will show the challenges faced during data analysis and how modern machine learning methods can be used to improve the precision of these measurements.

http://physics.lbl.gov/rpm/index.php/events/
If you are looking to confirm if there is an event, due to room reservation, please go to RPM website for a list of all scheduled talks.
──────────
Troy Cortez is inviting you to a scheduled Zoom meeting.
Join Zoom Meeting
https://lbnl.zoom.us/j/95906405235
Meeting ID: 959 0640 5235
One tap mobile
+16699006833,,95906405235# US (San Jose)
+13462487799,,95906405235# US (Houston)
Dial by your location
+1 669 900 6833 US (San Jose)
+1 346 248 7799 US (Houston)
+1 253 215 8782 US (Tacoma)
+1 301 715 8592 US (Germantown)
+1 312 626 6799 US (Chicago)
+1 646 558 8656 US (New York)
Meeting ID: 959 0640 5235
Find your local number: https://lbnl.zoom.us/u/a9dnGtb5T
Join by SIP
95906405235@zoomcrc.com
Join by H.323
162.255.37.11 (US West)
162.255.36.11 (US East)
115.114.131.7 (India Mumbai)
115.114.115.7 (India Hyderabad)
213.19.144.110 (EMEA)
103.122.166.55 (Australia)
64.211.144.160 (Brazil)
69.174.57.160 (Canada)
207.226.132.110 (Japan)
Meeting ID: 959 0640 5235
──────────

Elliott Reynolds (University of Birmingham) "Searching for New Physics using the Higgs Boson and Machine Learning"
2021-01-27 15:00 - 16:00 | Zoom Talk, 50A-5132, Berkeley, ca, 94720
Abstract:

The Higgs boson is the only fundamental spin-0 particle in the Standard Model (SM) of particle physics, associated with an ever-present field that is the source of mass and linked to electroweak symmetry breaking, making it a particle like no other. Its mass and spin provide us with the strongest indication yet that something is amiss with the SM, and offer a unique window to probe the SM and new physics in its decays. This talk covers a broad range of searches sensitive to new physics in the Higgs sector using the ATLAS detector at the CERN LHC, with an emphasis on the versatile role of novel machine learning techniques. The related physics prospects of the high-luminosity upgrade of the LHC and the ATLAS detector are also discussed.

──────────
Troy Cortez is inviting you to a scheduled Zoom meeting.
Join Zoom Meeting
https://lbnl.zoom.us/j/97582336673
Meeting ID: 975 8233 6673
One tap mobile
+16699006833,,97582336673# US (San Jose)
+13462487799,,97582336673# US (Houston)
Dial by your location
+1 669 900 6833 US (San Jose)
+1 346 248 7799 US (Houston)
+1 253 215 8782 US (Tacoma)
+1 312 626 6799 US (Chicago)
+1 646 558 8656 US (New York)
+1 301 715 8592 US (Washington D.C)
Meeting ID: 975 8233 6673
Find your local number: https://lbnl.zoom.us/u/arXhC3CAb
Join by SIP
97582336673@zoomcrc.com
Join by H.323
162.255.37.11 (US West)
162.255.36.11 (US East)
115.114.131.7 (India Mumbai)
115.114.115.7 (India Hyderabad)
213.19.144.110 (Amsterdam Netherlands)
213.244.140.110 (Germany)
103.122.166.55 (Australia)
64.211.144.160 (Brazil)
69.174.57.160 (Canada)
207.226.132.110 (Japan)
Meeting ID: 975 8233 6673
──────────

Florian Bernlochner (Bonn) "Fantastic Bs and where to find them! "
2021-01-28 08:00 - 17:00 | Zoom Talk, 50A-5132, Berkeley, ca, 94720
Abstract:
The Belle II Experiment is a next generation SuperB factory that aims to discover new physics phenomena at the highest intensities. It started its first physics run in 2019 and will until the end of 2021 collect a data set comparable to what the previous B-Factory experiments recorded during a decade-long run. I will review the current status, point out the contributions my group is strongly involved in, and provide an outlook for the summer conferences 2021.
http://physics.lbl.gov/rpm/index.php/events/
If you are looking to confirm if there is an event, due to room reservation, please go to RPM website for a list of all scheduled talks.
──────────
Troy Cortez is inviting you to a scheduled Zoom meeting.
Join Zoom Meeting
https://lbnl.zoom.us/j/91782268585
Meeting ID: 917 8226 8585
One tap mobile
+16699006833,,91782268585# US (San Jose)
+13462487799,,91782268585# US (Houston)
Dial by your location
+1 669 900 6833 US (San Jose)
+1 346 248 7799 US (Houston)
+1 253 215 8782 US (Tacoma)
+1 646 558 8656 US (New York)
+1 301 715 8592 US (Germantown)
+1 312 626 6799 US (Chicago)
Meeting ID: 917 8226 8585
Find your local number: https://lbnl.zoom.us/u/abeLb1T4q1
Join by SIP
91782268585@zoomcrc.com
Join by H.323
162.255.37.11 (US West)
162.255.36.11 (US East)
115.114.131.7 (India Mumbai)
115.114.115.7 (India Hyderabad)
213.19.144.110 (EMEA)
103.122.166.55 (Australia)
64.211.144.160 (Brazil)
69.174.57.160 (Canada)
207.226.132.110 (Japan)
Meeting ID: 917 8226 8585
──────────

Mariel Pettee (Yale University) "The Search for VH (V → Leptons, H → 𝜏𝜏) with the ATLAS Experiment in Run 2"
2021-01-28 16:00 - 17:00 | Zoom Talk, 50A-5132, Berkeley, ca, 94720
Abstract:

As part of a comprehensive plan to investigate the many combinations of production and decay of the Standard Model Higgs boson using the full Run 2 ATLAS dataset at the LHC, I will present a search for the SM Higgs boson produced in association with a leptonically-decaying vector boson (i.e. a W or Z boson) and decaying into a pair of tau leptons. Efficient identification of hadronically-decaying tau leptons at the trigger level is essential to this analysis, so I will also discuss my technical work in deploying an RNN-based tau identification scheme in the ATLAS High-Level Trigger (HLT) in Run 2. Lastly, I will show highlights of my independent AI work in leading teams of researchers across academia and industry to pioneer the state-of-the-art in AI-generated choreography using techniques including Variational Autoencoders (VAEs) and Graph Neural Networks (GNNs).

http://physics.lbl.gov/rpm/index.php/events/
If you are looking to confirm if there is an event, due to room reservation, please go to RPM website for a list of all scheduled talks.
──────────
Troy Cortez is inviting you to a scheduled Zoom meeting.
Join Zoom Meeting
https://lbnl.zoom.us/j/95547677630
Meeting ID: 955 4767 7630
One tap mobile
+16699006833,,95547677630# US (San Jose)
+12532158782,,95547677630# US (Tacoma)
Dial by your location
+1 669 900 6833 US (San Jose)
+1 253 215 8782 US (Tacoma)
+1 346 248 7799 US (Houston)
+1 312 626 6799 US (Chicago)
+1 646 558 8656 US (New York)
+1 301 715 8592 US (Washington D.C)
Meeting ID: 955 4767 7630
Find your local number: https://lbnl.zoom.us/u/ady5iTj2aJ
Join by SIP
95547677630@zoomcrc.com
Join by H.323
162.255.37.11 (US West)
162.255.36.11 (US East)
115.114.131.7 (India Mumbai)
115.114.115.7 (India Hyderabad)
213.19.144.110 (Amsterdam Netherlands)
213.244.140.110 (Germany)
103.122.166.55 (Australia)
64.211.144.160 (Brazil)
69.174.57.160 (Canada)
207.226.132.110 (Japan)
Meeting ID: 955 4767 7630
──────────

SPECIAL RPM-Berkeley Cosmology Seminar | Anton Baleato Lizancos (University of Cambridge) "Fundamental Physics with CMB Lensing and Delensing: the Good, the Bad and the Systematics"
2021-02-02 13:10 - 14:10 | Zoom Talk, 50A-5132, Berkeley, ca, 94720
Abstract:
Gravitational lensing of CMB photons by the matter distribution of the Universe can be both a blessing and nuisance. It’s a blessing because of the way it can be harnessed to map the structures responsible for the deflections, and from this, constrain any physics affecting the growth of cosmic structure, such as the sum of the neutrino masses or dark matter. But lensing is also a nuisance because it generates B-mode polarization which obscures the highly-sought-after primordial signal associated with gravitational waves generated during cosmic inflation, our most accessible portal to physics near the GUT scale. In this talk, I will focus on key systematic effects that need to be controlled in order to harness the full potential of the Simons Observatory (SO), CMB-S4, and other upcoming experiments to make progress in these exciting areas.

In the first part of my talk, I will briefly review the ways in which emission from galaxies and clusters can bias power spectra and cross-correlations of CMB lensing reconstructions, and describe our ongoing efforts to understand these biases analytically. Then, in the second part, I will explain how the lensing contamination to CMB B-modes can be removed — what is known as delensing — and discuss our recent findings regarding the performance of different delensing methods. I will also summarize preparatory work to delens SO data, and highlight biases to watch out for (and how to mitigate them) when the matter proxy used for delensing is either the cosmic infrared background or a lensing reconstruction derived from the CMB itself.

──────────
Troy Cortez is inviting you to a scheduled Zoom meeting.
Join Zoom Meeting
https://lbnl.zoom.us/j/95317538825
Meeting ID: 953 1753 8825
One tap mobile
+16699006833,,95317538825# US (San Jose)
+13462487799,,95317538825# US (Houston)
Dial by your location
+1 669 900 6833 US (San Jose)
+1 346 248 7799 US (Houston)
+1 253 215 8782 US (Tacoma)
+1 312 626 6799 US (Chicago)
+1 646 558 8656 US (New York)
+1 301 715 8592 US (Washington D.C)
Meeting ID: 953 1753 8825
Find your local number: https://lbnl.zoom.us/u/acS28Unfh8
Join by SIP
95317538825@zoomcrc.com
Join by H.323
162.255.37.11 (US West)
162.255.36.11 (US East)
115.114.131.7 (India Mumbai)
115.114.115.7 (India Hyderabad)
213.19.144.110 (Amsterdam Netherlands)
213.244.140.110 (Germany)
103.122.166.55 (Australia)
64.211.144.160 (Brazil)
69.174.57.160 (Canada)
207.226.132.110 (Japan)
Meeting ID: 953 1753 8825
──────────

Nitish Nayak (University of California, Irvine) "Ghostbusters : Estimation of Neutrino Oscillation Parameters by the NOvA Experiment"
2021-02-02 16:00 - 17:00 | Zoom Talk, 50A-5132, Berkeley, ca, 94720
Abstract:
The discovery of neutrino oscillations provides the first indication of a lepton flavor violating (LFV) process, one that isn’t predicted by the Standard Model. Extending the Standard Model picture to account for this usually proceeds via the addition of new mass terms, either Dirac or Majorana in nature or both, to the Standard Model Lagrangian. Probing the LFV process by characterizing the strength of neutrino oscillations is therefore fundamental to understanding the nature of neutrino masses. In addition, there is a possibility that neutrino oscillations are CP-violating which can provide hints about the observed matter-antimatter asymmetry in the universe. The NOvA experiment at Fermilab was designed to be sensitive to such questions by measuring some of the key parameters governing oscillatory behaviour. It detects neutrinos (antineutrinos) using an intense beam of predominantly muon-neutrinos (muon-antineutrinos) from the NuMI facility at Fermilab. It does this by housing two detectors, a 1-kiloton Near Detector near the beam source and a massive 14-kiloton Far Detector, 810 km away, near the Canadian border. The measurement of neutrino oscillation parameters is performed by examining the neutrino beam and the simulation at the Near Detector and then observing how many neutrinos have oscillated by the time they reach the Far Detector. This is a challenging analysis highlighted by the fact that only a handful of oscillated events are observed at the Far Detector every year. This is made worse by the fact that the Far Detector is placed on the surface, thus collecting an enormous amount of cosmic background (at a rate of $sim$ 10 kHz). In this talk I will therefore provide an overview of how this measurement is performed and some of the key problems we wrestle with. These problems can be statistical, computational and even theoretical and so I will put particular emphasis on the methodologies used in overcoming them.

http://physics.lbl.gov/rpm/index.php/events/
If you are looking to confirm if there is an event, due to room reservation, please go to RPM website for a list of all scheduled talks.
──────────
Troy Cortez is inviting you to a scheduled Zoom meeting.

Join Zoom Meeting
https://lbnl.zoom.us/j/96362789941
Meeting ID: 963 6278 9941
One tap mobile
+16699006833,,96362789941# US (San Jose)
+13462487799,,96362789941# US (Houston)
Dial by your location
+1 669 900 6833 US (San Jose)
+1 346 248 7799 US (Houston)
+1 253 215 8782 US (Tacoma)
+1 646 558 8656 US (New York)
+1 301 715 8592 US (Washington DC)
+1 312 626 6799 US (Chicago)
Meeting ID: 963 6278 9941
Find your local number: https://lbnl.zoom.us/u/aduPl1eNAA
Join by SIP
96362789941@zoomcrc.com
Join by H.323
162.255.37.11 (US West)
162.255.36.11 (US East)
115.114.131.7 (India Mumbai)
115.114.115.7 (India Hyderabad)
213.19.144.110 (Amsterdam Netherlands)
213.244.140.110 (Germany)
103.122.166.55 (Australia)
64.211.144.160 (Brazil)
69.174.57.160 (Canada)
207.226.132.110 (Japan)
Meeting ID: 963 6278 9941
──────────

Geoff Penington (UCB) "Replica Wormholes, Entanglement Wedges and the Black Hole Information Paradox"
2021-02-11 16:00 - 17:00 | Zoom Talk, 50A-5132, Berkeley, ca, 94720
Abstract:
Hawking famously argued, based on semiclassical calculations, that the radiation from evaporating black holes is contains no information about the matter that fell in. This would be inconsistent with the unitarity of quantum mechanics. In this talk, I will show that, in more careful ‘replica trick’ calculations, the gravitational path integral becomes dominated at late times by saddles containing spacetime wormholes. These wormholes cause the entropy to decrease after the Page time, consistent with unitarity, and allow information to escape from the interior of the black hole.
http://physics.lbl.gov/rpm/index.php/events/
If you are looking to confirm if there is an event, due to room reservation, please go to RPM website for a list of all scheduled talks.
──────────
Troy Cortez is inviting you to a scheduled Zoom meeting.
Join Zoom Meeting
https://lbnl.zoom.us/j/91782268585
Meeting ID: 917 8226 8585
One tap mobile
+16699006833,,91782268585# US (San Jose)
+13462487799,,91782268585# US (Houston)
Dial by your location
+1 669 900 6833 US (San Jose)
+1 346 248 7799 US (Houston)
+1 253 215 8782 US (Tacoma)
+1 646 558 8656 US (New York)
+1 301 715 8592 US (Germantown)
+1 312 626 6799 US (Chicago)
Meeting ID: 917 8226 8585
Find your local number: https://lbnl.zoom.us/u/abeLb1T4q1
Join by SIP
91782268585@zoomcrc.com
Join by H.323
162.255.37.11 (US West)
162.255.36.11 (US East)
115.114.131.7 (India Mumbai)
115.114.115.7 (India Hyderabad)
213.19.144.110 (EMEA)
103.122.166.55 (Australia)
64.211.144.160 (Brazil)
69.174.57.160 (Canada)
207.226.132.110 (Japan)
Meeting ID: 917 8226 8585
──────────

David Weinberg (OSU) "Cosmology Past, Present, and Future"
2021-03-11 16:00 - 17:00 | Zoom Talk, 50A-5132, Berkeley, ca, 94720
David Weinberg (OSU)

“Cosmology Past, Present, and Future”

I will give a broad overview of the current state of observational cosmology, with historical context and an eye to the future. Developments over the past three decades have led to a standard cosmological scenario that is remarkably successful at explaining a wide array of high precision measurements. However, this scenario leaves several big questions at best partially answered. What is dark matter? Why is the expansion of the universe accelerating? What is the physics of inflation and the
origin of the universe? I will discuss observational tensions that hint at cracks within the standard model, and I will discuss ongoing and upcoming experimental efforts that aim at order-of-magnitude increases in measurement precision with the hope of revealing vital new clues about the physics of the cosmos.

http://physics.lbl.gov/rpm/index.php/events/
If you are looking to confirm if there is an event, due to room reservation, please go to RPM website for a list of all scheduled talks.
──────────
Troy Cortez is inviting you to a scheduled Zoom meeting.
Join Zoom Meeting
https://lbnl.zoom.us/j/91782268585
Meeting ID: 917 8226 8585
One tap mobile
+16699006833,,91782268585# US (San Jose)
+13462487799,,91782268585# US (Houston)
Dial by your location
+1 669 900 6833 US (San Jose)
+1 346 248 7799 US (Houston)
+1 253 215 8782 US (Tacoma)
+1 646 558 8656 US (New York)
+1 301 715 8592 US (Germantown)
+1 312 626 6799 US (Chicago)
Meeting ID: 917 8226 8585
Find your local number: https://lbnl.zoom.us/u/abeLb1T4q1
Join by SIP
91782268585@zoomcrc.com
Join by H.323
162.255.37.11 (US West)
162.255.36.11 (US East)
115.114.131.7 (India Mumbai)
115.114.115.7 (India Hyderabad)
213.19.144.110 (EMEA)
103.122.166.55 (Australia)
64.211.144.160 (Brazil)
69.174.57.160 (Canada)
207.226.132.110 (Japan)
Meeting ID: 917 8226 8585
──────────
