BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//LBNL Physics Division Research Progress Meetings - ECPv6.8.3//NONSGML v1.0//EN
CALSCALE:GREGORIAN
METHOD:PUBLISH
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
REFRESH-INTERVAL;VALUE=DURATION:PT1H
X-Robots-Tag:noindex
X-PUBLISHED-TTL:PT1H
BEGIN:VTIMEZONE
TZID:America/Los_Angeles
BEGIN:DAYLIGHT
TZOFFSETFROM:-0800
TZOFFSETTO:-0700
TZNAME:PDT
DTSTART:20150308T100000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:-0700
TZOFFSETTO:-0800
TZNAME:PST
DTSTART:20151101T090000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:-0800
TZOFFSETTO:-0700
TZNAME:PDT
DTSTART:20160313T100000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:-0700
TZOFFSETTO:-0800
TZNAME:PST
DTSTART:20161106T090000
END:STANDARD
TZID:UTC
BEGIN:STANDARD
TZOFFSETFROM:+0000
TZOFFSETTO:+0000
TZNAME:UTC
DTSTART:20160101T000000
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20160421T160000
DTEND;TZID=America/Los_Angeles:20160421T170000
DTSTAMP:20260414T213540
CREATED:20160405T142753Z
LAST-MODIFIED:20160405T142753Z
UID:241-1461254400-1461258000@rpm.physics.lbl.gov
SUMMARY:Chris Marshall (Univ. of Rochester) "Measurement of $K^{+}$ production by neutrinos at MINERvA"
DESCRIPTION:Abstract:\nCharged kaon production by atmospheric neutrinos is a background in searches for the proton decay $p \rightarrow K^{+} \bar{\nu}$. Measurements of neutrino-induced $K^{+}$ production are important inputs for current and future proton decay searches at Super-K\, Hyper-K and DUNE. The MINERvA neutrino-nucleus cross section experiment at Fermilab uses timing information to isolate a sample of $K^{+}$ decay-at-rest events. I will present the first differential cross section measurements for both charged- and neutral-current $K^{+}$ production by neutrinos\, and discuss how these measurements can be used to constrain background predictions for proton decay. I will also show the first experimental evidence for coherent $K^{+}$ production by neutrinos.
URL:https://rpm.physics.lbl.gov/event/chris-marshall-univ-of-rochester-measurement-of-k-production-by-neutrinos-at-minerva/
LOCATION:Zoom Talk\, 50A-5132\, Berkeley\, ca\, 94720
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20160331T160000
DTEND;TZID=America/Los_Angeles:20160331T170000
DTSTAMP:20260414T213540
CREATED:20160322T084936Z
LAST-MODIFIED:20160322T084936Z
UID:238-1459440000-1459443600@rpm.physics.lbl.gov
SUMMARY:Andrea Gabrielli\, Michele Papucci\, Zoltan Ligeti (LBNL) "Highlights from Morion EW and QCD"
DESCRIPTION:Abstract:  \n\nA brief overview of the main highlights discussed at Moriond 2016 is presented\, with particular focus on LHC results\, neutrino and flavour physics. One of the main topic of the conference is the first look at the results from LHC after its first run of 13 TeV proton-proton collisions ended last year. The experimental data confirm the Standard Model expectation concerning the vector boson\, top and Higgs production rates. Searches for new resonances decaying into two photons in the ATLAS and CMS experiments have shown that the most significant deviation from the background prediction is observed at a diphoton invariant mass around 750 GeV. At the same time\, the negative searches for signals of new phenomena decaying into other final state tightly constrained many new-physics scenarios\, challenging previous theoretical wisdom and opening new perspectives in fundamental physics.
URL:https://rpm.physics.lbl.gov/event/andrea-gabrielli-michele-papucci-zoltan-ligeti-lbnl-highlights-from-morion-ew-and-qcd/
LOCATION:Zoom Talk\, 50A-5132\, Berkeley\, ca\, 94720
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20160324T160000
DTEND;TZID=America/Los_Angeles:20160324T170000
DTSTAMP:20260414T213540
CREATED:20160127T103249Z
LAST-MODIFIED:20160127T103249Z
UID:211-1458835200-1458838800@rpm.physics.lbl.gov
SUMMARY:Simone Pagan Griso (LBNL) "Search for Supersymmetric Long-Lived Particles with the ATLAS Experiment"
DESCRIPTION:Abstract:\nSupersymmetry is a well motivated extension of the Standard Model of particle physics\,\nalthough its realization in nature has yet to be proven.\nThe main efforts at the Large Hadron Collider to probe for supersymmetry\nat the electroweak mass scale focus on the so-called “prompt” signatures.\nIn these cases\, the super-symmetric partners of the known Standard Model particles\neither decay close to the production point\, within the detector resolution\, or\ntraverse the detector with no strong interaction\, leaving usually a large imbalance\nof momentum in the transverse plane.\nIn this seminar I will focus on searches for supersymmetric particles\nwith a significant lifetime\, that could be either directly or indirectly measured.\nSuch particles can easily evade current constraints based on prompt signatures.\nAfter a brief introduction on the main mechanisms leading to long-lived\nparticles in supersymmetric theories\, I will review the experimental techniques\nemployed in these searches using the ATLAS detector.\nI will then present an overview of the data analysis results\, with a particular focus on\nthe most recent ones.
URL:https://rpm.physics.lbl.gov/event/simone-pagan-griso-lbnl-tba/
LOCATION:Zoom Talk\, 50A-5132\, Berkeley\, ca\, 94720
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20160317T160000
DTEND;TZID=UTC:20160317T170000
DTSTAMP:20260414T213540
CREATED:20150916T161356Z
LAST-MODIFIED:20150916T161356Z
UID:128-1458230400-1458234000@rpm.physics.lbl.gov
SUMMARY:Michael Kagan (Stanford) "Exploring the TeV Energy Regime with Double Higgs Production at the LHC"
DESCRIPTION:Abstract:\n\nThe discovery of the Higgs boson by the ATLAS and CMS experiments at the Large Hadron Collider provides a novel tool to search for signs of physics beyond the Standard Model at the LHC. The Higgs boson is central to two frontiers in high energy physics today: the fundamental understanding of the mechanism for Electroweak Symmetry Breaking and for the generation of particle masses\, and the exciting prospect of discovering new heavy TeV-scale particles interacting with the Higgs boson.  Such new particles are predicted in theories of physics beyond the Standard Model which may incorporate  additional symmetries or extra dimensions of space-time.   In this talk\, I will focus on how the search for di-Higgs boson production using the four bottom quark decay channel is central to probing both of these frontiers. I will discuss the critical developments in bottom quark identification that have enabled such searches for the first time.  I will also discuss key advancements in high performance silicon pixel detectors and in new pattern recognition techniques inspired by cutting-edge machine learning and computer vision methods that are extending the future discovery potential at the LHC.
URL:https://rpm.physics.lbl.gov/event/reserved-12/
LOCATION:Zoom Talk\, 50A-5132\, Berkeley\, ca\, 94720
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20160315T160000
DTEND;TZID=America/Los_Angeles:20160315T170000
DTSTAMP:20260414T213540
CREATED:20160121T171034Z
LAST-MODIFIED:20160121T171034Z
UID:207-1458057600-1458061200@rpm.physics.lbl.gov
SUMMARY:Dominick Olivito (CERN) "Searches for Dark Matter and Supersymmetry at 13 TeV with CMS"
DESCRIPTION:Abstract: \n\nResults will be presented from searches looking for a large transverse momentum imbalance motivated by dark matter and supersymmetry\, using a sample of proton-proton collisions collected at a center-of-mass energy of 13 TeV in 2015 with the CMS detector at the LHC.  An inclusive analysis for hadronic jets and missing transverse momentum (MET)\, measured using the MT2 variable\, will be covered\, as well as an analysis searching for a pair of leptons with opposite-sign and the same flavor\, hadronic jets\, and MET.  The latter analysis looks for one of two features in the mass spectrum of the lepton pair: either a resonance compatible with the Z boson mass or a kinematic edge.  The results of each search are interpreted in simplified models of supersymmetry.
URL:https://rpm.physics.lbl.gov/event/dominick-olivito/
LOCATION:Zoom Talk\, 50A-5132\, Berkeley\, ca\, 94720
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20160310T160000
DTEND;TZID=UTC:20160310T170000
DTSTAMP:20260414T213540
CREATED:20150916T161334Z
LAST-MODIFIED:20150916T161334Z
UID:127-1457625600-1457629200@rpm.physics.lbl.gov
SUMMARY:Shirley Ho (Carnegie Mellon University) " Joining Forces Against the Dark Universe: From the Cosmic Microwave Background to the Large Scale Structure"
DESCRIPTION:Abstract: \n\nDespite tremendous recent progress\, gaps remain in our knowledge of our understanding of the Universe. We have not yet pinned down the properties of dark energy\, nor have we confirmed Einstein’s theory of Gravity at the largest scales.Current and upcoming large sky surveys of the Cosmic Microwave Background (CMB)\, Large Scale Structure (LSS) in galaxies\, quasars and Lyman-alpha forest present us with the best opportunity to understand  properties of the Universe.\n\nI will first review recent cosmology results from CMB and LSS\, concentrating on BOSS results using Baryon Acoustic Oscillations and Redshift Space Distortions. I will then introduce novel cosmological probes which combine CMB with LSS directly. These novel probes will open new windows into the momentum field of the Universe and Gravity at the largest scales. I will finally put these into the context of upcoming surveys such as Dark Energy Spectroscopic Instrument (DESI)\, Wide Field Infrared Survey Telescope (WFIRST) and CMB S4.
URL:https://rpm.physics.lbl.gov/event/reserved-11/
LOCATION:Zoom Talk\, 50A-5132\, Berkeley\, ca\, 94720
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20160308T160000
DTEND;TZID=America/Los_Angeles:20160308T170000
DTSTAMP:20260414T213540
CREATED:20160303T131221Z
LAST-MODIFIED:20160303T131221Z
UID:227-1457452800-1457456400@rpm.physics.lbl.gov
SUMMARY:Sho Uemura (Stanford) "The Heavy Photon Search Experiment at Jefferson Lab"
DESCRIPTION:Abstract:\nThe Heavy Photon Search (HPS) is a new experiment at Jefferson Lab searching for massive U(1) vector bosons (also known as heavy photons\, dark photons\, or A prime with a weak effective coupling to electric charge. The heavy photon is motivated as part of a hidden sector” model of dark matter\, where it would mediate the self-interaction of dark matter and the interaction of dark and ordinary matter. HPS is sensitive to heavy photons of mass 10-500 MeV with coupling strength episilon squared of 1e-5 to 1e-10. The HPS experiment is designed to produce heavy photons in a process analoguous to bremsstrahlung using an electron beam on a fixed target\, and detect decays to e+e pairs with two signatures (invariant mass resonance and displaced decay vertex). The detector is a compact\, large-acceptance forward spectrometer comprising a silicon microstrip tracker for momentum measurement and vertexing and an electromagnetic calorimeter for triggering on e+e. Precise beamline controls\, high-rate trigger and DAQ\, and good time resolution are needed for a detector that comes within 0.5 mm of the beam and is sensitive down to  15 mrad from the beam plane\, and must cope with the intense beam background in this environment. A low-mass tracker and clean track reconstruction are needed for the best sensitivity. This talk will describe the HPS experiment and its current status after test\, commissioning\, and engineering runs.
URL:https://rpm.physics.lbl.gov/event/sho-uemura-stanford-the-heavy-photon-search-experiment-at-jefferson-lab/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20160303T160000
DTEND;TZID=UTC:20160303T170000
DTSTAMP:20260414T213540
CREATED:20150916T161312Z
LAST-MODIFIED:20150916T161312Z
UID:126-1457020800-1457024400@rpm.physics.lbl.gov
SUMMARY:Julien Guy (LPNHE) " The Prospects and Challenges of the Dark Energy Spectroscopic Instrument
DESCRIPTION:Abstract :\nI will present the prospects of DESI for the measurement of Dark\nEnergy in light of a decade of efforts to unveil its nature\, from the\ndiscovery of cosmic acceleration with type Ia supernovae\, to the most\nrecent results with supernovae and baryon acoustic oscillations (BAO).\nDESI will map cosmic expansion up to redshifts of 3\, anchoring\ndistances at low redshift to the era of past deceleration with an\norder of magnitude gain in precision compared to current surveys.\nDESI data will offer a stringent test of the standard model of\ncosmology\, with important possibilities for discovery.\nThe project\, however\, is not free from experimental challenges. I will\nreview the analysis efforts needed to extract the whole potential of\nthe BAO probe\, from the optimization and calibration of the efficiency\nof the redshift survey\, to the characterization of the instrumental\nnoise in the Lyman-alpha forests.
URL:https://rpm.physics.lbl.gov/event/reserved-10/
LOCATION:Zoom Talk\, 50A-5132\, Berkeley\, ca\, 94720
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20160301T160000
DTEND;TZID=America/Los_Angeles:20160301T170000
DTSTAMP:20260414T213540
CREATED:20160120T144308Z
LAST-MODIFIED:20160120T144308Z
UID:205-1456848000-1456851600@rpm.physics.lbl.gov
SUMMARY:Mariarosaria D'Alfonso (CERN) "New Physics at LHC: Energy and Precision Frontiers"
DESCRIPTION:Abstract:\n\nThe evidence for the existence of dark matter in the universe is overwhelming; yet its exact nature\, its mass(es) and coupling constants\, are completely unknown. If kinematically accessible at colliders\, these particles are expected to be produced directly or in the cascade of other new hypothetical particles. At the same time\, the global fit to electroweak precision data impressively demonstrates the predictive power of Standard Model. Increasing the theoretical and experimental precision on electroweak observables may reveal inconsistencies between measurements and predictions due to the presence of new particles in the loop corrections. I will discuss a discovery physics program to take the full advantage of the ability of the LHC to probe the energy and the precision frontiers. I will highlight how improved scientific instruments with new possibilities will enable these searches.
URL:https://rpm.physics.lbl.gov/event/mariarosaria-dalfonso-tba/
LOCATION:Zoom Talk\, 50A-5132\, Berkeley\, ca\, 94720
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20160225T160000
DTEND;TZID=America/Los_Angeles:20160225T170000
DTSTAMP:20260414T213540
CREATED:20160120T144041Z
LAST-MODIFIED:20160120T144041Z
UID:204-1456416000-1456419600@rpm.physics.lbl.gov
SUMMARY:Heather Gray (CERN) " Chasing Beauty: Probing the Higgs Using B-Quarks
DESCRIPTION:Abstract: \nIn the Standard Model\, the Higgs has the highest probability to decay to b-quarks\, yet this is one of the most challenging channels to observe at the LHC. I will explain the importance of measuring the coupling to the Higgs b-quarks\, outline the ATLAS Run-1 H->bb analysis and review the current status of our knowledge of the coupling of the Higgs to b-quarks. I will also discuss how we might expect to observe the coupling of the Higgs to b-quarks during Run-2 of the LHC or in the future.  Finally\, I will discuss future measurements towards the Higgs self-coupling to explore the mechanism of electroweak symmetry breaking.
URL:https://rpm.physics.lbl.gov/event/heather-gray-tba/
LOCATION:Zoom Talk\, 50A-5132\, Berkeley\, ca\, 94720
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20160223T160000
DTEND;TZID=UTC:20160223T170000
DTSTAMP:20260414T213540
CREATED:20150916T161251Z
LAST-MODIFIED:20150916T161251Z
UID:125-1456243200-1456246800@rpm.physics.lbl.gov
SUMMARY:Andreu Font-Ribera (LBNL) "Studying the Expansion of the Universe with Quasar Spectra"
DESCRIPTION:Abstract: \nFrom 2009 to 2014\, the Baryon Oscillation Spectroscopic Survey (BOSS) used the SDSS telescope to obtain spectra of 1.5 million galaxies to get very accurate measurements of the Baryon Acoustic Oscillations (BAO) scale at redshift z ~0.5. At the same time\, BOSS observed over 184 000 high redshift quasars (z>2.15) with the goal of detecting the BAO feature in the clustering of the intergalactic medium\, using a technique known as the Lyman alpha forest (LyaF).\nIn this talk I will overview several results from the LyaF working group in BOSS\, including the measurement of BAO at z=2.4 both from the auto-correlation of the LyaF (Delubac et al. 2015)\, and from its cross-correlation with quasars (Font-Ribera et al. 2014). From the combination of these studies we are able to measure the expansion rate of the Universe 11 billion years ago with a 2% uncertainty.\nIn the near future\, the Dark Energy Spectroscopic Instrument (DESI) will increase this data set by an order of magnitude. DESI will provide an exquisite measurement of the expansion over cosmic time\, while at the same time addressing other interesting questions: the sum of the mass of the neutrino species\, properties of dark matter particles\, tests of general relativity and the shape of the primordial power spectrum of density fluctuations.
URL:https://rpm.physics.lbl.gov/event/reserved-9/
LOCATION:Zoom Talk\, 50A-5132\, Berkeley\, ca\, 94720
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20160218T080000
DTEND;TZID=America/Los_Angeles:20160218T170000
DTSTAMP:20260414T213540
CREATED:20160218T104138Z
LAST-MODIFIED:20160218T104138Z
UID:219-1455782400-1455814800@rpm.physics.lbl.gov
SUMMARY:Special RPM | Daniel Holz (U. Chicago) " Observation of Gravitational Waves from a Binary Black Hole Merger"
DESCRIPTION:We will provide an overview of LIGO’s first event. The signal is consistent with the merger of two black holes of ~30 Msun at a distance of ~400 Mpc. We will discuss some aspects of the detection\, including parameter estimation\, tests of general relativity\, and astrophysical constraints.
URL:https://rpm.physics.lbl.gov/event/special-rpm-daniel-holz-u-chicago-observation-of-gravitational-waves-from-a-binary-black-hole-merger/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20160211T160000
DTEND;TZID=UTC:20160211T170000
DTSTAMP:20260414T213540
CREATED:20150916T161135Z
LAST-MODIFIED:20150916T161135Z
UID:122-1455206400-1455210000@rpm.physics.lbl.gov
SUMMARY:Neal Dalal (Univ. Illinois at Urbana-Champaign) "Detecting Dark Matter Substructure Using ALMA"
DESCRIPTION:Abstract: \nDark matter halos surrounding galaxies are expected to contain copious substructure\, in the form of gravitationally bound subhalos.  Local Group observations suggest that our Galaxy has a deficit of substructure (the Missing Satellites Problem)\, possibly indicating new physics in the dark sector.  I will describe how gravitational lensing may be used to measure the amount of dark substructure that exists in typical galaxy halos.  In particular\, I will explain how observations by the newly commissioned ALMA observatory of dusty galaxies from CMB surveys can probe halo substructure.  I will show first results from our ALMA Cycle 2 observations\, and argue that ALMA should be able to answer the Missing Satellites Problem in upcoming years.
URL:https://rpm.physics.lbl.gov/event/reserved-6/
LOCATION:Zoom Talk\, 50A-5132\, Berkeley\, ca\, 94720
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20160204T160000
DTEND;TZID=UTC:20160204T170000
DTSTAMP:20260414T213540
CREATED:20150916T161107Z
LAST-MODIFIED:20150916T161107Z
UID:121-1454601600-1454605200@rpm.physics.lbl.gov
SUMMARY:Frank Golf (UCSB) "Searching for New Physics with the Large Hadron Collider"
DESCRIPTION:Abstract:\nAfter a two-year shutdown\, the LHC restarted proton-proton collisions in 2015 with an increase in center-of-mass energy to 13 TeV.  I describe some early results with data from the first year of running and plans for the significantly larger datasets that we expect to collect in the coming years.
URL:https://rpm.physics.lbl.gov/event/reserved-5/
LOCATION:Zoom Talk\, 50A-5132\, Berkeley\, ca\, 94720
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20160126T160000
DTEND;TZID=America/Los_Angeles:20160126T170000
DTSTAMP:20260414T213540
CREATED:20160119T143133Z
LAST-MODIFIED:20160119T143133Z
UID:201-1453824000-1453827600@rpm.physics.lbl.gov
SUMMARY:Gaosong Li (Shanghai Jiao Tong University) - "Daya Bay Experiment"
DESCRIPTION:Abstract:\nThe Daya Bay Reactor Neutrino Experiment is designed to measure the neutrino mixing angle  with unprecedented precision. The experiment utilizes multiple pairs of identical antineutrino detectors (ADs) at different baselines from three pairs of reactor cores to minimize systematic uncertainties. In 2012\, Daya Bay made the first definitive measurement of a non-zero value for $\theta_{13}$ using the first 55 days of data collected with six ADs by measuring the antineutrino rate deficit. With the final two ADs installed\, Daya Bay resumed data taking in full 8-AD configuration in late 2012. More than 1 (0.15) million electron antineutrino candidates had been collected with the near (far) site detectors by the end of 2013\, significantly improving the precision on . In addition to precision measurement of neutrino oscillation parameters\, analyses exploring various other physics potential are carried out.\nIn this talk\, I will focus on the calibration system. I will present calibration related works I have been working on to improve the detector absolute efficiency and neutrino oscillation analysis. I will also present the results on neutrino oscillation parameters from an independent analysis.
URL:https://rpm.physics.lbl.gov/event/gaosong-li-shanghai-jiao-tong-university-daya-bay-experiment/
LOCATION:Zoom Talk\, 50A-5132\, Berkeley\, ca\, 94720
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20160121T160000
DTEND;TZID=UTC:20160121T170000
DTSTAMP:20260414T213540
CREATED:20150916T161019Z
LAST-MODIFIED:20150916T161019Z
UID:119-1453392000-1453395600@rpm.physics.lbl.gov
SUMMARY:Walter Pettus (YALE/WISCONSIN) "The DM-Ice Dark Matter Experiment"
DESCRIPTION:Abstract:\nDM-Ice is a phased program towards the first direct detection search for dark matter in the Southern Hemisphere with a quarter ton scale NaI(Tl) crystal array.  It will provide an understanding of the modulation signal reported by DAMA by running arrays at both Northern and Southern Hemisphere sites.  A first generation experiment with 17-kg of active mass\, DM-Ice17\, was deployed in December 2010 at a depth of 2457 m under the ice at the geographic South Pole and has concluded its 3.5-yr primary physics run.  An active R&D program is ongoing at the Boulby Underground Laboratory to investigate clean crystals and optimize detector components.  A worldwide consortium of sodium iodide experiments is now preparing two 100-kg arrays to start data taking in 2016.  I will report on the successes of the DM-Ice program and how the stage is set for definitively testing the DAMA signal anomaly.
URL:https://rpm.physics.lbl.gov/event/reserved-3/
LOCATION:Zoom Talk\, 50A-5132\, Berkeley\, ca\, 94720
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20160119T160000
DTEND;TZID=America/Los_Angeles:20160119T170000
DTSTAMP:20260414T213540
CREATED:20160112T113837Z
LAST-MODIFIED:20160112T113837Z
UID:192-1453219200-1453222800@rpm.physics.lbl.gov
SUMMARY:Shawn Westerdale (PRINCETON) "Detecting Dark Matter with DarkSide-50"
DESCRIPTION:Abstract:\nDark matter constitutes 85% of the matter in the universe\, yet despite its abundance\, very little is known about it. One popular theory is that dark matter is made of Weakly Interacting Massive Particles\, or WIMPs. Due to the low cross section for WIMP-nucleus interactions\, the event rate of WIMPs in a detector is expected to be very low. This means that detectors must have extraordinarily low background rates and good background rejection in order to be able to detect these rare events above their background.\nDarkSide-50 is a 50 kg liquid argon time project chamber\, nested inside of a 30 tonne boron-loaded liquid scintillator neutron veto\, which is inside a 1000 tonne water Cherenkov muon veto. Since neutrons can leave a signal identical to what is expected from WIMPs\, neutrons are the most dangerous background to such an experiment. I will talk about the latest results from the DarkSide-50 detector\, which recently published results from 120 days of running background free. This talk will also have a focus on the design and performance of the neutron veto system that enables the detector to remain free of neutron backgrounds by vetoing neutrons with > 99.2% efficiency.
URL:https://rpm.physics.lbl.gov/event/shawn-westerdale-princeton-detecting-dark-matter-with-darkside-50/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20160114T160000
DTEND;TZID=America/Los_Angeles:20160114T170000
DTSTAMP:20260414T213540
CREATED:20151211T144416Z
LAST-MODIFIED:20151211T144416Z
UID:183-1452787200-1452790800@rpm.physics.lbl.gov
SUMMARY:Franz Elsner (UCL) "Parameter estimation in cosmology - The Planck likelihood"
DESCRIPTION:Abstract:\nThe inference of cosmological parameters requires the construction of a likelihood function that acts as an interface between theory and observational data. Using the CMB experiment Planck as a worked example\, I provide an overview of the challenges associated with the analysis of high-resolution\, state of the art experiments. In particular\, I will discuss the approximations necessary to make an analysis feasible in practice\, the role of nuisance parameters\, and tests used to assess the robustness of the results. Reviewing the most important cosmological implications of Planck\, I will conclude with an outlook of what we can expect to learn from future experiments.
URL:https://rpm.physics.lbl.gov/event/lungu-u-penn-tba/
LOCATION:Zoom Talk\, 50A-5132\, Berkeley\, ca\, 94720
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20160112T160000
DTEND;TZID=UTC:20160112T170000
DTSTAMP:20260414T213540
CREATED:20150916T160945Z
LAST-MODIFIED:20150916T160945Z
UID:118-1452614400-1452618000@rpm.physics.lbl.gov
SUMMARY:Tomo Lazovich (Harvard) "One Higgs\, Two Higgs\, Old Higgs\, New Higgs: the Higgs boson from discovery to new physics with the ATLAS experiment"
DESCRIPTION:Abstract:\n\n\nThe discovery of the Higgs in Run 1 of the LHC provided a more complete picture of the Standard Model and also gave particle physicists a new tool to use in the search for Beyond the Standard Model physics. With center of mass energy now at 13 TeV in LHC Run 2\, we are poised to produce new resonances and probe higher energy scales. I will first discuss the challenging WW decay channel of the Higgs and how we went from discovery to the current best measurement of the Higgs cross section and observation of the vector boson fusion production mode. I will then discuss searches for new physics in both resonant and non-resonant production of two Higgs bosons in the 4b final state in Run 2\, detailing the advantages and difficulties of using this final state to search for new physics over a wide range of masses.
URL:https://rpm.physics.lbl.gov/event/reserved-2/
LOCATION:Zoom Talk\, 50A-5132\, Berkeley\, ca\, 94720
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20151216T160000
DTEND;TZID=America/Los_Angeles:20151216T170000
DTSTAMP:20260414T213540
CREATED:20151210T083404Z
LAST-MODIFIED:20151210T083404Z
UID:175-1450281600-1450285200@rpm.physics.lbl.gov
SUMMARY:Special RPM - Rachel Mandelbaum (CMU) "Recent Progress and Future Prospects for Weak Lensing Cosmology""
DESCRIPTION:Abstract:\nMeasurements of weak gravitational lensing (coherent shape distortions of distant galaxies due to the lensing effect of mass between us and those galaxies) and are among the most promising ways to learn about the equation of state of dark energy\, the theory of gravity on cosmological scales\, and the connection between galaxies and the dark matter density field.  In this talk\, I will review the state of the field of weak lensing\, including recent cosmological analysis and prospects with future surveys.  I will then discuss some of the obstacles to robust weak lensing cosmology\, such as the difficulty in estimating coherent galaxy shape distortions in real data\, or in removing the effect of coherent galaxy shape alignments that arise due to (for example) large-scale tidal fields.  After presenting recent progress on both of these sources of systematic uncertainty\, I will conclude with future prospects for reducing them to below the statistical error and enabling robust cosmological constraints with future large surveys such as LSST\, Euclid\, and WFIRST.
URL:https://rpm.physics.lbl.gov/event/special-rpm-rachel-mandelbaum-cmu-tba/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20151215T160000
DTEND;TZID=America/Los_Angeles:20151215T170000
DTSTAMP:20260414T213540
CREATED:20151124T085546Z
LAST-MODIFIED:20151124T085546Z
UID:165-1450195200-1450198800@rpm.physics.lbl.gov
SUMMARY:Ben Nachman (SLAC) "Measuring and Exploiting the Quantum Properties of Jets with the ATLAS Detector"
DESCRIPTION:Abstract:\nQuarks and gluons hadronize before their properties can be directly measured.  However\, information about the origin\, electric charge\, and color charge of high energy quarks and gluons is embedded in the resulting collimated sprays of hadrons known as jets.  This information defines the quantum properties of jets: the observable consequences of the quantum properties of quarks and gluons on the jets they form.  Such properties are often subtle\, but the ATLAS collaboration has recently demonstrated that even the electric and color charge can be extracted with high precision.  These measurements have important implications for probing the emergent properties of the strong force at the highest available energies and for searching for physics beyond the Standard Model.
URL:https://rpm.physics.lbl.gov/event/ben-nachman-tba-measuring-and-exploiting-the-quantum-properties-of-jets-with-the-atlas-detector/
LOCATION:Zoom Talk\, 50A-5132\, Berkeley\, ca\, 94720
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20151210T080000
DTEND;TZID=America/Los_Angeles:20151210T170000
DTSTAMP:20260414T213540
CREATED:20150812T171236Z
LAST-MODIFIED:20150812T171236Z
UID:1028-1449734400-1449766800@rpm.physics.lbl.gov
SUMMARY:Lene Bryngemark (Lund U.) " Searches for Physics Beyond the Standard Model Using Dijets in ATLAS"
DESCRIPTION:Abstract:\nThe LHC gives us access to the highest collider energies\, at the highest intensities\, providing a unique opportunity to thoroughly examine the constituents of matter and their interactions at ever smaller distances and higher mass scales. Jets are produced in the highest momentum transfer collisions and are thus at the energy frontier. With the recent increase in LHC beam energy\, ATLAS makes use of this sensitivity to make its first statements of what physics looks like in a new energy regime. In this presentation\, I show the results from both the 8 and the more recent 13 TeV analysis of dijet mass and angular distributions. I also mention some possible extensions of this analysis to further enhance its discovery potential for physics beyond the Standard Model.
URL:https://rpm.physics.lbl.gov/event/chamberlain-fellow-search-8/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20151203T160000
DTEND;TZID=America/Los_Angeles:20151203T170000
DTSTAMP:20260414T213540
CREATED:20150812T171156Z
LAST-MODIFIED:20150812T171156Z
UID:1027-1449158400-1449162000@rpm.physics.lbl.gov
SUMMARY:Hongtao Yang (CERN) "ATLAS Measurement of Higgs Boson Production in the Diphoton Decay Channel and ATLAS-CMS Combined Measurement of the Higgs Boson Mass"
DESCRIPTION:Abstract:\nUnderstanding the properties of the newly-discovered Higgs boson has been one of the priorities of the LHC physics program. In this talk\, I will present the measurement of Higgs boson production processes in the diphoton decay channel using 4.5/fb of pp collisions at 7 TeV and 20.3/fb at 8 TeV collected by the ATLAS experiment at the LHC\, and discuss the essential role of this decay channel in the Higgs boson coupling studies. I will also cover the measurement of Higgs boson mass based on the combined data samples of the ATLAS and CMS experiments in the high resolution diphoton and four-lepton decay channels.
URL:https://rpm.physics.lbl.gov/event/chamberlain-fellow-search-6/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20151124T160000
DTEND;TZID=America/Los_Angeles:20151124T170000
DTSTAMP:20260414T213540
CREATED:20151020T132905Z
LAST-MODIFIED:20151020T132905Z
UID:152-1448380800-1448384400@rpm.physics.lbl.gov
SUMMARY:Sheldon Stone (Syracuse Univ.) "Pentaquarks and Tetraquarks at LHCb"
DESCRIPTION:Abstract: \nI will discuss the discovery of two pentaquark states both decaying into a J/ψ meson and a proton. The decay mode defines the quark content as c cbar\, u\, u\, d\, and thus are called charmonium pentaquarks. These exotic structures are found in Λb→J/ψ K- p decays whose existence and properties are determined from a full amplitude analysis using 7 and 8 TeV pp collision data corresponding to an integrated luminosity of 3/fb collected by the LHCb experiment. The two states will be shown to be of opposite parity and have spins 3/2 and 5/2. I will also present a determination of spin parity of the the Z(4430) tetraquark meson\, also a charmonium state. Finally different models of pentaquark structure will be discussed.
URL:https://rpm.physics.lbl.gov/event/sheldon-stone-syracuse-univ-tba/
LOCATION:Zoom Talk\, 50A-5132\, Berkeley\, ca\, 94720
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20151119T160000
DTEND;TZID=America/Los_Angeles:20151119T170000
DTSTAMP:20260414T213540
CREATED:20151105T092142Z
LAST-MODIFIED:20151105T092142Z
UID:159-1447948800-1447952400@rpm.physics.lbl.gov
SUMMARY:Sara Simon (Princeton) "The Atacama B-Mode Search: Cosmic Microwave Background Polarimetry at 17\,000 Feet"
DESCRIPTION:Abstract:\nThe Atacama B-mode Search (ABS) was a crossed-Dragone telescope located at an elevation of 5200 m in the Atacama Desert in Chile that observed the cosmic microwave background (CMB) from February 2012 until October 2014. ABS searched for the primordial B-mode polarization signal at large angular scales from multipole moments of l~40 to l~500\, where it is expected to peak. The ABS focal plane consisted of 240 pixels sensitive to 145 GHz\, each containing two transition-edge sensor bolometers coupled to orthogonal polarizations. Cold optics and a warm\, rapidly rotating half-wave plate made the ABS instrument unique. I will discuss the ABS instrument and its contributions to the field of CMB cosmology.
URL:https://rpm.physics.lbl.gov/event/s-simon-princeton-the-atacama-b-mode-search-cosmic-microwave-background-polarimetry-at-17000-feet/
LOCATION:Zoom Talk\, 50A-5132\, Berkeley\, ca\, 94720
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20151117T160000
DTEND;TZID=America/Los_Angeles:20151117T170000
DTSTAMP:20260414T213540
CREATED:20151026T161718Z
LAST-MODIFIED:20151026T161718Z
UID:155-1447776000-1447779600@rpm.physics.lbl.gov
SUMMARY:Anna Patej (Harvard) "Distributions of Baryons from the Virial Radius of Galaxy Clusters to Large Scales"
DESCRIPTION:Abstract:\nI will discuss my recent work on the distributions of baryonic matter on various scales\, from the gas and galaxies in galaxy clusters to the clustering of massive galaxies on large scales. Near the virial radius of galaxy clusters\, long-standing analytical models of structure formation as well as recent simulations predict the existence of steep density jumps in the gas and dark matter profiles. I will describe a new method for deriving models for the gas distribution in galaxy clusters\, which relies on a few basic assumptions — including the existence of such density jumps — and show a resulting profile for the gas that is in good agreement with X-ray observations of cluster interiors and simulations of the outskirts.\nSince cluster member galaxies are expected to follow similar collisionless dynamics as the dark matter\, the galaxy density profile should show a steep density jump as well. I will address the question of whether we can find evidence for a feature consistent with a density jump with current observations\, and will additionally discuss avenues for probing the density jumps with future data sets.\nMoving to larger scales where massive galaxies of different types are expected to roughly trace the same large-scale structure\, I will present a test of this prediction by measuring the clustering of red and blue galaxies at z~0.6 using the CMASS sample of galaxies from DR12 of SDSS-III. The stochasticity between these two samples can be quantified via the correlation coefficient r\, which can be constructed from two different statistics\, both of which indicate that on intermediate scales (20 < R < 100 Mpc/h) there is low stochasticity between the two samples of galaxies.\nLastly\, I will describe some ongoing and future observational efforts\, focusing on my involvement with the DECam Legacy Survey (DECaLS)\, a pathfinder imaging survey for the upcoming Dark Energy Spectroscopic Instrument (DESI) galaxy redshift survey.\nSlides
URL:https://rpm.physics.lbl.gov/event/reserved-7/
LOCATION:Zoom Talk\, 50A-5132\, Berkeley\, ca\, 94720
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20151112T160000
DTEND;TZID=America/Los_Angeles:20151112T170000
DTSTAMP:20260414T213540
CREATED:20150812T171044Z
LAST-MODIFIED:20150812T171044Z
UID:1026-1447344000-1447347600@rpm.physics.lbl.gov
SUMMARY:C.M. Delitzsch (U. of Geneva) "Jet substructure techniques at the LHC: a probe of physics beyond the Standard Model"
DESCRIPTION:
URL:https://rpm.physics.lbl.gov/event/chamberlain-fellow-search-3/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20151110T160000
DTEND;TZID=America/Los_Angeles:20151110T170000
DTSTAMP:20260414T213540
CREATED:20150812T170933Z
LAST-MODIFIED:20150812T170933Z
UID:1024-1447171200-1447174800@rpm.physics.lbl.gov
SUMMARY:J. Duarte (Caltech) "Naturalness Confronts Nature: Searches for Superparticles at CMS"
DESCRIPTION:
URL:https://rpm.physics.lbl.gov/event/chamberlain-fellow-search/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20151105T160000
DTEND;TZID=America/Los_Angeles:20151105T170000
DTSTAMP:20260414T213540
CREATED:20150812T171016Z
LAST-MODIFIED:20150812T171016Z
UID:1025-1446739200-1446742800@rpm.physics.lbl.gov
SUMMARY:Reserved (TBD)
DESCRIPTION:
URL:https://rpm.physics.lbl.gov/event/chamberlain-fellow-search-2/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20151029T160000
DTEND;TZID=America/Los_Angeles:20151029T170000
DTSTAMP:20260414T213540
CREATED:20150929T101840Z
LAST-MODIFIED:20150929T101840Z
UID:141-1446134400-1446138000@rpm.physics.lbl.gov
SUMMARY:Ken Heller (Univ. Minnesota) "NOνA Begins – First Results from the NOvA Neutrino Oscillation Experiment"
DESCRIPTION:Abstract:\nThe NOνA long baseline neutrino oscillation experiment has just completed its initial data run and the analysis of that data. This run constitutes about 8% of the planned data. The first run resulted in a measurement of the oscillation of muon neutrinos into two modes. One the disappearance of muon neutrinos\, the 2-3 oscillation\, and the other the appearance of electron neutrinos\, the 1-3 oscillation. In addition to describing the results and their impact on the neutrino mass ordering and CP violation\, I will describe the construction and design of this unique 14 kiloton detector.
URL:https://rpm.physics.lbl.gov/event/ken-heller-univ-minnesota-tba/
LOCATION:Zoom Talk\, 50A-5132\, Berkeley\, ca\, 94720
END:VEVENT
END:VCALENDAR