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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:UTC
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TZOFFSETFROM:+0000
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TZNAME:UTC
DTSTART:20160101T000000
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TZID:America/Los_Angeles
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DTSTART:20160313T100000
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DTSTART;TZID=UTC:20160112T160000
DTEND;TZID=UTC:20160112T170000
DTSTAMP:20260528T193453
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:20160114T160000
DTEND;TZID=America/Los_Angeles:20160114T170000
DTSTAMP:20260528T193453
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=America/Los_Angeles:20160119T160000
DTEND;TZID=America/Los_Angeles:20160119T170000
DTSTAMP:20260528T193453
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=UTC:20160121T160000
DTEND;TZID=UTC:20160121T170000
DTSTAMP:20260528T193453
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:20160126T160000
DTEND;TZID=America/Los_Angeles:20160126T170000
DTSTAMP:20260528T193453
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
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