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X-WR-CALNAME:LBNL Physics Division Research Progress Meetings
X-ORIGINAL-URL:https://rpm.physics.lbl.gov
X-WR-CALDESC:Events for LBNL Physics Division Research Progress Meetings
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BEGIN:VTIMEZONE
TZID:America/Los_Angeles
BEGIN:DAYLIGHT
TZOFFSETFROM:-0800
TZOFFSETTO:-0700
TZNAME:PDT
DTSTART:20170312T100000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:-0700
TZOFFSETTO:-0800
TZNAME:PST
DTSTART:20171105T090000
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BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20171212T160000
DTEND;TZID=America/Los_Angeles:20171212T170000
DTSTAMP:20260413T231642
CREATED:20170807T104630Z
LAST-MODIFIED:20170807T104630Z
UID:611-1513094400-1513098000@rpm.physics.lbl.gov
SUMMARY:Michaela Queitsch-Maitland (DESY) Title: "Precision measurements of Higgs boson production and the search for dark matter in ttbar events at the LHC"
DESCRIPTION:Abstract: \n“Despite the huge success of the Standard Model (SM)\, there is overwhelming evidence for physics beyond the SM and many remaining questions\, such as the nature of dark matter (DM). The current leading candidate for DM are Weakly Interacting Massive Particles (WIMPs)\, which could be produced directly at colliders.\nIn this talk I will discuss complimentary methods for exploring new phenomena at the LHC with the ATLAS experiment. Firstly\, through precision measurements of the Higgs boson properties\, and secondly though the production of missing transverse energy in association with pairs of top quarks.\nFinally\, I will discuss the High Luminosity LHC (HL-LHC) project and the ATLAS inner tracker (ITk) upgrade\, focusing on characterising the end-of-lifetime performance and validations of material budget estimates.”
URL:https://rpm.physics.lbl.gov/event/reserved-58/
LOCATION:HYBRID 50A-5132 (Sessler Conference Room)\, https://lbnl.zoom.us/j/91782268585\, 50A-5132
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20171207T160000
DTEND;TZID=America/Los_Angeles:20171207T170000
DTSTAMP:20260413T231642
CREATED:20170807T104554Z
LAST-MODIFIED:20170807T104554Z
UID:609-1512662400-1512666000@rpm.physics.lbl.gov
SUMMARY:Daniel Baxter (Northwestern University) Probing the Dark Sector: The Quest for a Background-Free Detector
DESCRIPTION:Abstract:\nDark matter represents one of the most sought after discoveries in physics. Leading theories predict that extremely sensitive detectors could probe nuclear recoils from dark matter interactions. The PICO collaboration uses bubble chambers to look for the energy deposition from such an interaction. The biggest challenge in searching for dark matter is the mitigation and understanding of the numerous other sources of events that could look like dark matter\, namely radioactive backgrounds. I will discuss how a long effort to understand backgrounds in the PICO bubble chambers led to the recent background-free result of PICO-60 and how discoveries made along the way might affect other rare event searches.\nBio:\nDaniel Baxter is a graduating 5th year PhD student at Northwestern University and active member of the international PICO collaboration searching for dark matter using bubble chamber detectors. His research has largely focused on dark matter detector calibration\, specifically understanding differences in detector response between nuclear and electron recoils. He has applied this expertise to the PICO-60 detector as run coordinator of its first physics run\, which became the first background-free run of a bubble chamber at the 40L scale.
URL:https://rpm.physics.lbl.gov/event/reserved-57/
LOCATION:HYBRID 50A-5132 (Sessler Conference Room)\, https://lbnl.zoom.us/j/91782268585\, 50A-5132
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20171130T160000
DTEND;TZID=America/Los_Angeles:20171130T170000
DTSTAMP:20260413T231642
CREATED:20170807T104500Z
LAST-MODIFIED:20170807T104500Z
UID:605-1512057600-1512061200@rpm.physics.lbl.gov
SUMMARY:Syed haider Abidi (University of Toronto) "Measurement of Higgs Boson Properties & ITk Detector Development"
DESCRIPTION:Abstract:\nDuring Run 1 of LHC\, the ATLAS and CMS collaboration firmly established the existence of a Higgs boson but detailed measurements were limited by statistical precision. With the larger Run 2 dataset\, we have measured the couplings and production cross-section of the Higgs boson using the H->ZZ->4l decay channel. The results improve upon the previous ones by more than a factor of 2. For the first time\, we also measure the differential cross-section within production modes and use it to place constraints on Beyond Standard Model scenarios.\nATLAS has an extensive detector upgrade plan to allow itself to collect and exploit the data delivered during HL-LHC. The upgrade of the current inner track with the all- silicon ITk is the largest project. At University of Toronto\, we have lead the Canadian effort to establish ITk strip module assembly. Collaborating with Celestica\, we have also established ASIC gluing and wire-bonding processes in industry. Additionally\, we are probing the impact of radiation damage to estimate the end-of-life performance of the ITk.\nBio:\nAs I have done my undergraduate training in Engineering Science\, I have been interested in bringing this prospective to physics research. As such I have been involved in many research projects\, ranging from condensed matter to accelerator development.\nSince 2013\, I have focused on measurements of Higgs boson properties using the ATLAS detector and ITk detector development. I have lead and been involved in numerous analyses using the H->ZZ->4l channel and analyses combining results from various other decay channels. Additionally I have led the development and investigation of ITk modules at University of Toronto. In the future\, I intend to continue pursuing both physics analyses and detector hardware.
URL:https://rpm.physics.lbl.gov/event/reserved-55/
LOCATION:HYBRID 50A-5132 (Sessler Conference Room)\, https://lbnl.zoom.us/j/91782268585\, 50A-5132
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20171121T160000
DTEND;TZID=America/Los_Angeles:20171121T170000
DTSTAMP:20260413T231642
CREATED:20170807T104350Z
LAST-MODIFIED:20170807T104350Z
UID:599-1511280000-1511283600@rpm.physics.lbl.gov
SUMMARY:Patrick Bryant (U. Chicago) "Measuring Higgs Pair Production at the LHC - Why and How?
DESCRIPTION:Abstract:\nAs the universe cooled immediately following the Big Bang\, the laws of physics underwent a dramatic phase transition. Underlying symmetries were broken and particles acquired mass as the Higgs field moved to a new ground state.\nIn this talk I will discuss why we should care about the precise nature of the electroweak phase transition (EWPT) and how the potential which generated the EWPT may be measured at the LHC.\nBio: Patrick received his B.S. in physics and mathematics at the University of Oregon in 2013 and has since been working towards his Ph.D. in experimental particle physics at the University of Chicago as a member of the ATLAS collaboration. He recently returned to Chicago after a year and a half at CERN in Geneva\, Switzerland to write his thesis on hardware based track reconstruction and the search for Higgs pair production in the four b-jet final state.
URL:https://rpm.physics.lbl.gov/event/reserved-52/
LOCATION:HYBRID 50A-5132 (Sessler Conference Room)\, https://lbnl.zoom.us/j/91782268585\, 50A-5132
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20171116T160000
DTEND;TZID=America/Los_Angeles:20171116T170000
DTSTAMP:20260413T231642
CREATED:20170807T104311Z
LAST-MODIFIED:20170807T104311Z
UID:597-1510848000-1510851600@rpm.physics.lbl.gov
SUMMARY:Ulascan Sarica (John Hopkins U.) "Measurements of Mass\, Width\, Lifetime\, and Anomalous Couplings of the H(125) Boson"
DESCRIPTION:Abstract:\nThe discovery of the Higgs boson has completed the set of particles predicted by the Standard Model (SM). It has been established by the CMS and ATLAS Collaborations at the Large Hadron Collider that the discovered boson is consistent with J^PC=0^++. The width of this boson is also consistent with the predicted value from the SM\, but the constraints using events at the resonance peak are orders of magnitude looser than the prediction. In this talk\, we will be exploring techniques developed to probe small anomalous couplings of the Higgs boson. Emphasis will be given to the recent studies of Higgs-diboson (HVV) couplings from the CMS Collaboration\, where information from associated production becomes even more important than the kinematics of Higgs decay products. We will also look at joint mass-width measurements using either events at the resonance peak or at the offshell tail of Higgs boson production. We will see that even small anomalous couplings show enhancement at the offshell tail and discuss briefly how joint constraints can be studied.
URL:https://rpm.physics.lbl.gov/event/reserved-51/
LOCATION:HYBRID 50A-5132 (Sessler Conference Room)\, https://lbnl.zoom.us/j/91782268585\, 50A-5132
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20171109T160000
DTEND;TZID=America/Los_Angeles:20171109T170000
DTSTAMP:20260413T231642
CREATED:20170912T073420Z
LAST-MODIFIED:20170912T073420Z
UID:631-1510243200-1510246800@rpm.physics.lbl.gov
SUMMARY:Bin Yu (University of California\, Berkeley) "Three Principles of Data Science: Predictability\, Stability\, and Computability"
DESCRIPTION:ABSTRACT:\nIn this talk\, I’d like to discuss the intertwining importance and connections of three principles of data science in the title in data-driven decisions.\nMaking prediction as its central task and embracing computation as its core\, machine learning has enabled wide-ranging data-driven successes. Prediction is a useful way to check with reality. Good prediction implicitly assumes stability between past and future. Stability (relative to data and model perturbations) is also a minimum requirement for interpretability and reproducibility of data driven results (cf. Yu\, 2013). It is closely related to uncertainty assessment. Obviously\, both prediction and stability principles can not be employed without feasible computational algorithms\, hence the importance of computability.\nThe three principles will be demonstrated in the context of two neuroscience projects and through analytical connections. In particular\, the first project adds stability to predictive modeling used for reconstruction of movies from fMRI brain signlas to gain interpretability of the predictive model. The second project uses predictive transfer learning that combines\nAlexNet\, GoogleNet and VGG with single V4 neuron data for state-of-the-art prediction performance. It provides stable function characterization of neurons via (manifold) deep dream images from the predictive models in the difficult primate visual cortex V4. Our V4 results lend support\, to a certain extent\, to the resemblance of these CNNs to a primate brain.
URL:https://rpm.physics.lbl.gov/event/bin-yu-ucb-three-principles-of-data-science-predictability-stability-and-computability/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20171107T160000
DTEND;TZID=America/Los_Angeles:20171107T170000
DTSTAMP:20260413T231642
CREATED:20170807T104108Z
LAST-MODIFIED:20170807T104108Z
UID:591-1510070400-1510074000@rpm.physics.lbl.gov
SUMMARY:Reserved
DESCRIPTION:
URL:https://rpm.physics.lbl.gov/event/reserved-48/
LOCATION:HYBRID 50A-5132 (Sessler Conference Room)\, https://lbnl.zoom.us/j/91782268585\, 50A-5132
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20171102T160000
DTEND;TZID=America/Los_Angeles:20171102T170000
DTSTAMP:20260413T231642
CREATED:20170807T104044Z
LAST-MODIFIED:20170807T104044Z
UID:589-1509638400-1509642000@rpm.physics.lbl.gov
SUMMARY:Reserved
DESCRIPTION:
URL:https://rpm.physics.lbl.gov/event/reserved-47/
LOCATION:HYBRID 50A-5132 (Sessler Conference Room)\, https://lbnl.zoom.us/j/91782268585\, 50A-5132
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20171031T080000
DTEND;TZID=America/Los_Angeles:20171031T170000
DTSTAMP:20260413T231642
CREATED:20170807T103953Z
LAST-MODIFIED:20170807T103953Z
UID:587-1509436800-1509469200@rpm.physics.lbl.gov
SUMMARY:Reserved
DESCRIPTION:
URL:https://rpm.physics.lbl.gov/event/reserved-46/
LOCATION:HYBRID 50A-5132 (Sessler Conference Room)\, https://lbnl.zoom.us/j/91782268585\, 50A-5132
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20171026T080000
DTEND;TZID=America/Los_Angeles:20171026T170000
DTSTAMP:20260413T231642
CREATED:20170807T103935Z
LAST-MODIFIED:20170807T103935Z
UID:585-1509004800-1509037200@rpm.physics.lbl.gov
SUMMARY:Reserved
DESCRIPTION:
URL:https://rpm.physics.lbl.gov/event/reserved-45/
LOCATION:HYBRID 50A-5132 (Sessler Conference Room)\, https://lbnl.zoom.us/j/91782268585\, 50A-5132
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20171024T080000
DTEND;TZID=America/Los_Angeles:20171024T170000
DTSTAMP:20260413T231642
CREATED:20170807T103918Z
LAST-MODIFIED:20170807T103918Z
UID:583-1508832000-1508864400@rpm.physics.lbl.gov
SUMMARY:Reserved
DESCRIPTION:
URL:https://rpm.physics.lbl.gov/event/reserved-44/
LOCATION:HYBRID 50A-5132 (Sessler Conference Room)\, https://lbnl.zoom.us/j/91782268585\, 50A-5132
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20171019T160000
DTEND;TZID=America/Los_Angeles:20171019T170000
DTSTAMP:20260413T231642
CREATED:20170725T090848Z
LAST-MODIFIED:20170725T090848Z
UID:575-1508428800-1508432400@rpm.physics.lbl.gov
SUMMARY:Anthony Pullen (NYU) Title: Revealing CII Emission with LSS Cross-correlations
DESCRIPTION:Abstract:\n\nIn this talk\, I will present our joint measurement of cosmic infrared background (CIB) and CII line emission from large scales at redshift z=2.5 using an MCMC analysis of cross-correlations of the 3 high-frequency Planck bands with both SDSS-III quasars at z=2-3.2 and SDSS-III CMASS galaxies at z=0.43-0.7.  The CII emission is expected to correlate with the quasars and appear in the Planck 545 GHz band\, while the other cross-correlations are assumed to mostly be attributable to CIB-LSS correlations.  We report an excess emission inconsistent with the null result at 95% confidence\, with an intensity value favoring the higher range of CII models.  I will also forecast potential CII intensity constraints from Planck cross-correlated with DESI quasars.
URL:https://rpm.physics.lbl.gov/event/anthony-pullen-nyu-tba/
LOCATION:HYBRID 50A-5132 (Sessler Conference Room)\, https://lbnl.zoom.us/j/91782268585\, 50A-5132
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20171017T080000
DTEND;TZID=America/Los_Angeles:20171017T170000
DTSTAMP:20260413T231642
CREATED:20170807T103858Z
LAST-MODIFIED:20170807T103858Z
UID:581-1508227200-1508259600@rpm.physics.lbl.gov
SUMMARY:Reserved
DESCRIPTION:
URL:https://rpm.physics.lbl.gov/event/reserved-43/
LOCATION:HYBRID 50A-5132 (Sessler Conference Room)\, https://lbnl.zoom.us/j/91782268585\, 50A-5132
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20171012T160000
DTEND;TZID=America/Los_Angeles:20171012T170000
DTSTAMP:20260413T231642
CREATED:20170728T083157Z
LAST-MODIFIED:20170728T083157Z
UID:577-1507824000-1507827600@rpm.physics.lbl.gov
SUMMARY:Barnabas Poczos (CMU) Title: Distribution Regression and its Applications
DESCRIPTION:Abstract: \nThe most common machine learning algorithms operate on\nfinite-dimensional vectorial feature representations. In\nmany applications\, however\, the natural representation of the data\nconsists of more complex objects\,\nfor example functions\, distributions\, and sets\, rather than\nfinite-dimensional vectors. In this talk\nwe will discuss machine learning algorithms that can operate directly\non these complex\nobjects. For this purpose\, we use nonparametric statistical methods\nthat can consistently estimate the inner product\, distance\, and\ncertain kernel functions between distributions\, sets\, and other\nobjects. We will discuss applications in various scientific areas\nincluding cosmology (e.g. estimating the mass of galaxy clusters\,\nfinding anomalous galaxy clusters\, estimating the cosmological\nparameters of our Universe\, accelerating cosmological simulations)\,\nfluid dynamics (finding anomalous events in turbulence data)\,\nneuroimaging\, and agriculture
URL:https://rpm.physics.lbl.gov/event/barnabas-poczos-cmu-tba/
LOCATION:HYBRID 50A-5132 (Sessler Conference Room)\, https://lbnl.zoom.us/j/91782268585\, 50A-5132
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20171005T160000
DTEND;TZID=America/Los_Angeles:20171005T170000
DTSTAMP:20260413T231642
CREATED:20171002T085928Z
LAST-MODIFIED:20171002T085928Z
UID:652-1507219200-1507222800@rpm.physics.lbl.gov
SUMMARY:Simeon Bird (JHU) "Strong Absorbers in the Lyman-alpha Forest and Primordial Black Holes"
DESCRIPTION:Abstract:\nStrong HI absorbers are essentially the largest foreground contamination for Lyman alpha forest surveys\, and so a better understanding of them is necessary for achieving the goals of future Lyman alpha cosmology surveys. I will talk about a new automated technique for generating a probabilistic catalogue of strong absorbers for the entire survey\, allowing more robust cleaning of the foreground. Since no technique can entirely remove strong absorbers\, I will discuss new templates for characterising their effect on the flux power spectrum. A secondary systematic is induced by interpolation error between theoretical models\, and I will discuss techniques to mitigate this error with refining Gaussian Process emulators. Lastly I will discuss the interesting possibility that the surprisingly common mergers of ~30 solar mass black holes observed by LIGO could be primordial black hole dark matter\, which is intriguingly (still) not convincingly ruled out.
URL:https://rpm.physics.lbl.gov/event/simeon-bird-jhu-strong-absorbers-in-the-lyman-alpha-forest-and-primordial-black-holes/
LOCATION:HYBRID 50A-5132 (Sessler Conference Room)\, https://lbnl.zoom.us/j/91782268585\, 50A-5132
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20170928T160000
DTEND;TZID=America/Los_Angeles:20170928T170000
DTSTAMP:20260413T231642
CREATED:20170911T083146Z
LAST-MODIFIED:20170911T083146Z
UID:626-1506614400-1506618000@rpm.physics.lbl.gov
SUMMARY:Bertrand Echenard (Caltech) "Probing light dark matter with the LDMX experiment"
DESCRIPTION:ABSTRACT:\nElucidating the nature of dark matter is one of the central challenges\nin fundamental physics. Dark matter originating as a thermal relic\nfrom the early Universe is arguably one of the most compelling\nparadigm\, and WIMP searches have been the main focus of past\nexperimental efforts. Not as extensively explored\, the possibility of\nlight (sub-GeV) thermal dark matter could arise naturally if it is\npart of a dark sector neutral under all Standard Model forces. The\n“Light Dark Matter eXperiment” (LDMX) proposes to explore light\nthermal dark matter using an electron fixed-target missing momentum\napproach with a low current\, high-repetition beam. The expected\nsensitivity would surpassing by orders of magnitude the reach of any\nprevious or currently envisioned experiment\, and decisively test many\nsub-GeV thermal dark matter scenarios.
URL:https://rpm.physics.lbl.gov/event/bertrand-echenard-caltech-tba/
LOCATION:HYBRID 50A-5132 (Sessler Conference Room)\, https://lbnl.zoom.us/j/91782268585\, 50A-5132
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20170921T160000
DTEND;TZID=America/Los_Angeles:20170921T170000
DTSTAMP:20260413T231642
CREATED:20170621T152537Z
LAST-MODIFIED:20170621T152537Z
UID:557-1506009600-1506013200@rpm.physics.lbl.gov
SUMMARY:Kev Abazajian (UC\, Irvine) "Candidate Signals and Stringent Constraints from Dark Matter in the Sky"
DESCRIPTION:Abstract:\nI will discuss analyses leading to two recent candidate detections of photons from dark matter. Specifically\, these are: first\, gamma rays in a continuum “bump” at a few GeV which can be due to WIMP-like dark matter annihilation in the Galactic Center; and\, second\, X-rays from clusters of galaxies and Andromeda consistent with monoenergetic 3.55 keV photons from dark matter decay such as that predicted from sterile neutrino dark matter. Commensurately\, there are also stringent constraints on these signals. I will discuss the particle and cosmological model implications of both.
URL:https://rpm.physics.lbl.gov/event/kev-abazajian-uc-irvine-tba/
LOCATION:HYBRID 50A-5132 (Sessler Conference Room)\, https://lbnl.zoom.us/j/91782268585\, 50A-5132
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20170914T160000
DTEND;TZID=America/Los_Angeles:20170914T170000
DTSTAMP:20260413T231642
CREATED:20170424T155049Z
LAST-MODIFIED:20170424T155049Z
UID:538-1505404800-1505408400@rpm.physics.lbl.gov
SUMMARY:Cora Dvorkin (Harvard) "Discovering New Physics Beyond the Standard Model with Cosmological Data Sets"
DESCRIPTION:Abstract:\nCosmological observations have provided us with answers to age-old questions\, involving the age\, geometry\, and composition of the universe. However\, there are profound questions that still remain unanswered. I will describe ongoing efforts to shed light on some of these questions.\nIn the first part of this talk\, I will explain how we can use measurements of the CMB and the large-scale structure of the universe to reconstruct the detailed physics of much earlier epochs\, when the universe was only a tiny fraction of a second old. In particular\, I will show how we can probe the shape of the inflationary potential\, extra degrees of freedom during inflation\, and the signature of possible particles with mass and spin during this period.\nIn the last part of the talk\, I will discuss how we can use observations at large scales and sub-galactic scales (through strong gravitational lensing) to improve our understanding of another open question in fundamental physics: the particle nature of dark matter.
URL:https://rpm.physics.lbl.gov/event/cora-dvorkin-harvard-tba/
LOCATION:70A-3377\, 70A-3377
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20170831T160000
DTEND;TZID=America/Los_Angeles:20170831T170000
DTSTAMP:20260413T231642
CREATED:20170824T081430Z
LAST-MODIFIED:20170824T081430Z
UID:620-1504195200-1504198800@rpm.physics.lbl.gov
SUMMARY:Ben Nachman (LBNL) and Mateus Ploskon (LBNL) "Jet Substructure"
DESCRIPTION:ABSTRACT:\nThe LBNL xTalk (“cross-talk”) series provides a forum for the exchange of ideas between groups and across lab divisions.  Each seminar is focused on a theme which is confronted from two perspectives.  In particular\, the talks are given by two presenters from different domains. The format is informal (chalk talk!) and is designed to be entertaining and engaging.  Come prepared to learn and ask about details with the experts in order to stimulate collaborations between groups.  We hope that this will strengthen the program at the lab and spread new ideas.\nFor the first xTalk\, we will have Mateusz Ploskon from Nuclear Science and Benjamin Nachman from the Physics Division to discuss how jet substructure is used in ALICE/STAR and in ATLAS. Jets are collimated sprays of particles resulting from quarks and gluons produced at high energy. The radiation pattern within jets encodes a wealth of information about the parton that initiated it. Jet substructure is a hot topic in pp for tagging boosted W/Z/H bosons and also recently for precision probes of Quantum Chromodynamics (QCD); in heavy ion collisions\, jet substructure is an exciting new probe of medium modifications. Please join us for this comparative discussion of how jet substructure is used in two very different environments!\n \n\n 
URL:https://rpm.physics.lbl.gov/event/ben-nachman-lbnl-crosscut-seminar-jet-substructure/
LOCATION:HYBRID 50A-5132 (Sessler Conference Room)\, https://lbnl.zoom.us/j/91782268585\, 50A-5132
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20170817T160000
DTEND;TZID=America/Los_Angeles:20170817T170000
DTSTAMP:20260413T231642
CREATED:20170724T084928Z
LAST-MODIFIED:20170724T084928Z
UID:567-1502985600-1502989200@rpm.physics.lbl.gov
SUMMARY:Larry Lee (Harvard) "Searches for Sneaky SUSY at the ATLAS Experiment"
DESCRIPTION:ABSTRACT:\nDespite the lack of a sparticle discovery at the Large Hadron Collider\, and despite the fact that most of the discovery potential has shriveled to an upsetting size\, supersymmetry (SUSY) remains the most motivated solution to the Standard Model’s inadequacies. Because of this (and a large dose of stubbornness)\, we are forced to consider ways the nominal search strategy may have missed a discovery. Must SUSY present itself with lots of high-momentum objects and large missing transverse energy just because it’d be easy to find? This talk will discuss recent SUSY searches at ATLAS targeting signatures without large missing transverse energy as well as those sensitive to long-lived sparticles.
URL:https://rpm.physics.lbl.gov/event/larry-lee-harvard-tba/
LOCATION:HYBRID 50A-5132 (Sessler Conference Room)\, https://lbnl.zoom.us/j/91782268585\, 50A-5132
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20170815T160000
DTEND;TZID=America/Los_Angeles:20170815T170000
DTSTAMP:20260413T231642
CREATED:20170724T085023Z
LAST-MODIFIED:20170724T085023Z
UID:569-1502812800-1502816400@rpm.physics.lbl.gov
SUMMARY:Tova Holmes (ATLAS) "The FTK: Global Tracking for the ATLAS Trigger"
DESCRIPTION:Abstract: \nThe ATLAS Detector is in the process of upgrading its Trigger and Data Acquisition system to include global processing of tracks using the FastTracKer (FTK). The FTK uses a parallelized structure to identify and reconstruct the properties of tracks from the 98 million channels of the the ATLAS silicon detectors. With the use of hardware-level pattern matching and a two-tiered track-fitting system\, this reconstruction can be performed on all events passing the first-stage ATLAS trigger\, with a rate up to 100 kHz and requiring less than 100 µs per event. These capability opens new doors for b-jet and tau triggering\, allows for the suppression of pile-up effects on missing energy triggers\, and can even be used to isolate BSM signatures involving long-lived particles. This talk will discuss the physics case for the FTK\, an overview of its design\, and its integration status.
URL:https://rpm.physics.lbl.gov/event/tova-holmes-atlas-tba/
LOCATION:HYBRID 50A-5132 (Sessler Conference Room)\, https://lbnl.zoom.us/j/91782268585\, 50A-5132
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20170713T080000
DTEND;TZID=America/Los_Angeles:20170713T160000
DTSTAMP:20260413T231642
CREATED:20170612T123408Z
LAST-MODIFIED:20170612T123408Z
UID:552-1499932800-1499961600@rpm.physics.lbl.gov
SUMMARY:Zachary Marshall (LBNL) "Title: Searching for SUSY in Big Data at the LHC"
DESCRIPTION:ABSTRACT:\nOne of the most enticing and popular additions to the Standard Model of particle physics\, Supersymmetry\, is the target of a wide range of searches at the Large Hadron Collider at CERN.  The ATLAS and CMS experiments have produced an incredible variety of searches\, but Supersymmetry remains elusive.  We will discuss the results of some of the recent searches that demonstrate the dexterity of both experiments\, and point out which assumptions might be playing an important role in the interpretation of those results.  There are still many ways Supersymmetry could have escaped detection up to now\, and we will also point towards some of the next directions for searches for Supersymmetry at the LHC.  Along the way\, we will discuss some of the software and computing challenges that come with world-wide analysis of tens of billions of events\, and how the
URL:https://rpm.physics.lbl.gov/event/zachary-marshall-lbnl-tba/
LOCATION:HYBRID 50A-5132 (Sessler Conference Room)\, https://lbnl.zoom.us/j/91782268585\, 50A-5132
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20170622T160000
DTEND;TZID=America/Los_Angeles:20170622T170000
DTSTAMP:20260413T231642
CREATED:20170426T090514Z
LAST-MODIFIED:20170426T090514Z
UID:542-1498147200-1498150800@rpm.physics.lbl.gov
SUMMARY:Marcel Vos (CERN) "Prospects for Top Physics at the LHC and Beyond"
DESCRIPTION:ABSTRACT:\nExperiments at the Large Hadron Collider are characterizing the top quark and its interactions to unexpected precision. The combination of direct searches for new particles and indirect constraints from precision measurements provides powerful limits on extensions of the Standard Model. I start the seminar with a brief overview of top physics today and of the prospects for precision top physics of future LHC runs. This sets a high bar for future colliders that are to continue the programme initiated by Tevatron and LHC. In the second half of the seminar I discuss the potential of the future facilities envisaged in Asia and Europe. Powerful electron-positron machines have exquisite potential for key measurements such as the top quark mass and electro-weak couplings. Hadron colliders with a center-of-mass energy that significantly exceeds that of the LHC can probe the QCD interactions of the top quark an order of magnitude deeper and can provide a precise measurement of the top Yukawa coupling.
URL:https://rpm.physics.lbl.gov/event/marcel-vos-cern-tba/
LOCATION:HYBRID 50A-5132 (Sessler Conference Room)\, https://lbnl.zoom.us/j/91782268585\, 50A-5132
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20170601T080000
DTEND;TZID=America/Los_Angeles:20170601T170000
DTSTAMP:20260413T231642
CREATED:20170530T074927Z
LAST-MODIFIED:20170530T074927Z
UID:547-1496304000-1496336400@rpm.physics.lbl.gov
SUMMARY:Florian Beutler (Portsmouth) "On the reliability of Baryon Acoustic Oscillation (BAO) measurements"
DESCRIPTION:Abstract:\n\nIn this talk I will discuss the reliability of the Baryon Acoustic Oscillation (BAO) signal in the distribution of galaxies. The solid theoretical understanding of this observable means that it represents one of only a few cosmological observables that are not yet dominated by systematic errors. This is one reason why BAO are one of the main science drivers for future galaxy surveys like DESI and Euclid.\n\nI will discuss my recent work on the relative velocity effect as one potential systematic for BAO. The relative velocity effect originates from the same physical effects which imprinted the BAO signal and therefore acts on the same scale. I will introduce this effect in detail\, discuss how we can include it in our modeling and present current constraints from the Baryon Oscillation Spectroscopic Survey (BOSS).
URL:https://rpm.physics.lbl.gov/event/florian-beutler-portsmouth-tba/
LOCATION:HYBRID 50A-5132 (Sessler Conference Room)\, https://lbnl.zoom.us/j/91782268585\, 50A-5132
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20170523T080000
DTEND;TZID=America/Los_Angeles:20170525T170000
DTSTAMP:20260413T231642
CREATED:20170405T145537Z
LAST-MODIFIED:20170405T145537Z
UID:530-1495526400-1495731600@rpm.physics.lbl.gov
SUMMARY:Physical Sciences Institution Review
DESCRIPTION:
URL:https://rpm.physics.lbl.gov/event/physical-sciences-institution-review/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20170511T160000
DTEND;TZID=America/Los_Angeles:20170511T170000
DTSTAMP:20260413T231642
CREATED:20170118T111120Z
LAST-MODIFIED:20170118T111120Z
UID:441-1494518400-1494522000@rpm.physics.lbl.gov
SUMMARY:Prof. Rouven Essig (TBA) " Direct Detection of sub-GeV Dark Matter"
DESCRIPTION:Abstract:\nDark matter makes up 85% of the matter in our Universe\, but we have yet to learn its identity.  A broad array of search strategies are needed to probe for non-gravitational interactions between dark matter and ordinary matter.  While most searches focus on Weakly Interacting Massive Particles (WIMPs) with masses between 1 GeV and 1 TeV\, it is imperative to also consider other motivated dark matter candidates.  In this talk\, I will discuss dark matter with MeV-to-GeV masses\, which is a theoretically and phenomenologically appealing possibility and presents a new frontier in the search for dark matter.  I will highlight novel dark matter direct-detection strategies that can probe this under-explored mass range.  I will review how XENON10 data already probes dark matter with masses as low as a few MeV\, and present recent constraints using XENON100 data.  I will then discuss improvements expected from near-future experiments\, focusing on xenon\, semiconductor\, and scintillator targets.  This includes\, for example\, SENSEI\, which is a new ultra-low-threshold silicon CCD detector that is poised to probe vast new regions of parameter space in the next few years.  I will also present a few simple benchmark models of MeV-to-GeV dark matter\, and contrast direct-detection probes with searches at colliders and fixed-target experiments.
URL:https://rpm.physics.lbl.gov/event/prof-rouven-essig-tba-tba/
LOCATION:Zoom Talk\, 50A-5132\, Berkeley\, ca\, 94720
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20170504T160000
DTEND;TZID=America/Los_Angeles:20170504T170000
DTSTAMP:20260413T231642
CREATED:20170424T155005Z
LAST-MODIFIED:20170424T155005Z
UID:536-1493913600-1493917200@rpm.physics.lbl.gov
SUMMARY:Manoj Kaplighat (UC\, Irvine) "The self-interacting dark matter paradigm: motivations and tests"
DESCRIPTION:Abstract:\n\nI will describe how a simple model where dark matter has large elastic self-interactions (cross section over mass of order barns per GeV) can fully explain the observed diversity of all galactic rotation curves. I will summarize the constraints imposed on model building by observations of clusters of galaxies and end with an outline of tests of this paradigm.
URL:https://rpm.physics.lbl.gov/event/manoj-kaplighat-uc-irvine-tba/
LOCATION:HYBRID 50A-5132 (Sessler Conference Room)\, https://lbnl.zoom.us/j/91782268585\, 50A-5132
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20170427T160000
DTEND;TZID=America/Los_Angeles:20170427T170000
DTSTAMP:20260413T231642
CREATED:20170315T234736Z
LAST-MODIFIED:20170315T234736Z
UID:512-1493308800-1493312400@rpm.physics.lbl.gov
SUMMARY:Heather Gray (LBNL) Title: The Art of the Impossible: Probing challenging Higgs channels at the LHC
DESCRIPTION:Abstract: \n\nIn the technical design report of the LHC experiments\, measurements of the Higgs coupling to top and bottom quarks and the width of the Higgs were either predicted to be extremely challenging\, if not impossible at the LHC. Yet\, ATLAS and CMS have both produced interesting results for all these channels. I will highlight selected aspects of these measurements to discuss what allowed ATLAS and CMS to probe the “impossible“.
URL:https://rpm.physics.lbl.gov/event/heather-gray/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20170412T080000
DTEND;TZID=America/Los_Angeles:20170413T170000
DTSTAMP:20260413T231642
CREATED:20170316T151749Z
LAST-MODIFIED:20170316T151749Z
UID:517-1491984000-1492102800@rpm.physics.lbl.gov
SUMMARY:Director's Physics Division Review
DESCRIPTION:
URL:https://rpm.physics.lbl.gov/event/day-2-directors-physics-division-review/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20170330T160000
DTEND;TZID=America/Los_Angeles:20170330T170000
DTSTAMP:20260413T231642
CREATED:20170124T081855Z
LAST-MODIFIED:20170124T081855Z
UID:443-1490889600-1490893200@rpm.physics.lbl.gov
SUMMARY:Professor Sunil Golwala (Caltech) "The SuperCDMS SNOLAB Search for Low-Mass Dark Matter"
DESCRIPTION:Abstract\nThe dark matter problem\, known since the 1930s\, has only grown in importance during the current era of precision cosmology.  We remain unable to answer the question: what is the matter that makes of 5/6 of the universe’s matter density?  Yet we are also in an era of unparalleled theoretical creativity and experimental opportunity.  Theorists have vastly expanded the parameter space for weakly interacting massive particle dark matter in the last decade.  New experimental constraints and candidates have emerged from the LHC\, other accelerator experiments\, and direct and indirect detection dark matter searches.  I will summarize the current state of experimental searches for particle dark matter and focus on the upcoming search at low mass with the SuperCDMS  SNOLAB experiment.
URL:https://rpm.physics.lbl.gov/event/professor-sunil-golwala-caltech-tba/
LOCATION:Zoom Talk\, 50A-5132\, Berkeley\, ca\, 94720
END:VEVENT
END:VCALENDAR