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PRODID:-//LBNL Physics Division Research Progress Meetings - ECPv6.8.3//NONSGML v1.0//EN
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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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TZID:America/Los_Angeles
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TZOFFSETFROM:-0800
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TZNAME:PDT
DTSTART:20160313T100000
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DTSTART:20161106T090000
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DTSTART:20160101T000000
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BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20160301T160000
DTEND;TZID=America/Los_Angeles:20160301T170000
DTSTAMP:20260528T182312
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=UTC:20160303T160000
DTEND;TZID=UTC:20160303T170000
DTSTAMP:20260528T182312
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:20160308T160000
DTEND;TZID=America/Los_Angeles:20160308T170000
DTSTAMP:20260528T182312
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:20160310T160000
DTEND;TZID=UTC:20160310T170000
DTSTAMP:20260528T182312
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:20160315T160000
DTEND;TZID=America/Los_Angeles:20160315T170000
DTSTAMP:20260528T182312
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:20160317T160000
DTEND;TZID=UTC:20160317T170000
DTSTAMP:20260528T182312
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:20160324T160000
DTEND;TZID=America/Los_Angeles:20160324T170000
DTSTAMP:20260528T182312
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=America/Los_Angeles:20160331T160000
DTEND;TZID=America/Los_Angeles:20160331T170000
DTSTAMP:20260528T182312
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
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