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PRODID:-//LBNL Physics Division Research Progress Meetings - ECPv6.8.3//NONSGML v1.0//EN
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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:20170312T100000
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TZOFFSETFROM:-0700
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DTSTART:20171105T090000
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BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20170228T160000
DTEND;TZID=America/Los_Angeles:20170228T170000
DTSTAMP:20260422T164921
CREATED:20160922T160641Z
LAST-MODIFIED:20160922T160641Z
UID:351-1488297600-1488301200@rpm.physics.lbl.gov
SUMMARY:Yun-Tse Tsai (SLAC/Stanford) "Exploring ν Territory: Using LArTPC Technology ("ν“ here is a Greek alphabet accounting for neutrinos)"
DESCRIPTION:Abstract:\n\nThe discovery of neutrino oscillation\, which implies neutrinos have non-zero masses\, is the first instance of a conflict with the Standard Model of particle physics.  The fruitful results from neutrino experiments in the past two decades have opened a window into a new territory\, where the unanswered questions in the current theory\, such as the observed matter-antimatter asymmetry\, may be addressed by the upcoming precision measurements.\nIn this talk\, I will introduce the core topics of neutrino physics and the requirements of neutrino experiments\, focusing on the technology of liquid argon time projection chamber (LArTPC).  The outstanding spatial and energy resolution of LArTPC provides us with a promising apparatus for the required precision.  In particular\, I will discuss detection of neutrinos from supernova explosions\, and searches for other weakly interacting particles as well as rare physics processes.  I will talk about the MicroBooNE experiment\, the first large LArTPC in the U.S.\, its recent results\, and the future LArTPC experiments.
URL:https://rpm.physics.lbl.gov/event/reserved-38/
LOCATION:Zoom Talk\, 50A-5132\, Berkeley\, ca\, 94720
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20170302T160000
DTEND;TZID=America/Los_Angeles:20170302T170000
DTSTAMP:20260422T164921
CREATED:20170125T080518Z
LAST-MODIFIED:20170125T080518Z
UID:446-1488470400-1488474000@rpm.physics.lbl.gov
SUMMARY:Javier Tiffenberg (Fermilab) "Things to do with less than one electron: the dawn of the ultimate ionization detector"
DESCRIPTION:Abstract: \n\nSilicon charged coupled devices (CCDs) have proven to be exceptional for the detection and measurement of photons and other ionizing radiation. Their low energy threshold of 50eV (~14 e-) have made them ideal for astronomical aplications and for detectors exploring Neutrino interactions (CONNIE) and searching for Dark Matter particles (DAMIC). However\, the counting of individual photons and energy depositions below 50 eV has proven difficult due to an inability to reduce electronic noise below the level of a single charge carrier. Here I’ll present the results of a collaboration between Fermilab and LBL to build a Sub-Electron Noise Skipper Experimental Instrument (SENSEI) which uses a non-destructive readout technique to achieve stable readout for a thick fully depleted silicon CCD in the far sub-electron regime (∼ 0.05 e − rms/pix). This is the first time that discrete sub-electron counting has been achieved reproducibly over millions of pixels on a stable\, large-area detector (7 cm^2 ) with large dynamic range. This innovative technology has nearly immediate implications for a wide range of scientific disciplines including astronomy and fundamental particle physics.\n\nslides: pdf
URL:https://rpm.physics.lbl.gov/event/reserved-15/
LOCATION:Zoom Talk\, 50A-5132\, Berkeley\, ca\, 94720
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20170307T160000
DTEND;TZID=America/Los_Angeles:20170307T170000
DTSTAMP:20260422T164921
CREATED:20170125T080547Z
LAST-MODIFIED:20170125T080547Z
UID:448-1488902400-1488906000@rpm.physics.lbl.gov
SUMMARY:Elisabetta Pianori (CERN) "Unveiliing the Origin of  Particles' Mass: Higgs Boson Coupling Measurements at the LHC"
DESCRIPTION:Abstract:\nAlthough the Standard Model (SM) of particle physics is a very successful theory\, it fails to explain the origin of particles’ mass. If the Higgs mechanism\, developed in the 60s as a solution to this puzzle\, is the correct theory of Nature\, a new fundamental particle\, the Higgs boson\, must exist. In 2012\, at the LHC\, a particle consistent with the Higgs boson was discovered. The theory prescribes the strength of the Higgs boson interaction with SM particles\, but physics beyond the Standard Model could modify it. In this talk I will present the evidence of direct couplings of the Higgs boson to fermions and compare them with the predictions. I will also discuss the ATLAS+CMS combined measurement of the Higgs boson production and decay rates\, and how they constrains the Higgs boson’s couplings to SM particles and the existence of new physics.
URL:https://rpm.physics.lbl.gov/event/reserved-24/
LOCATION:Zoom Talk\, 50A-5132\, Berkeley\, ca\, 94720
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20170309T160000
DTEND;TZID=America/Los_Angeles:20170309T170000
DTSTAMP:20260422T164921
CREATED:20170125T080617Z
LAST-MODIFIED:20170125T080617Z
UID:450-1489075200-1489078800@rpm.physics.lbl.gov
SUMMARY:Timon Heim (LBNL) “Challenges of the ATLAS Phase 2 Tracker Upgrade”
DESCRIPTION:For the phase 2 upgrade of the ATLAS experiment at the LHC\, its inner detector will be replaced by a new all-silicon tracker\, the Inner Tracker (ITk). This upgrade is necessary both because the inner detector will have reached its intended lifetime and to maintain tracking performance of the ATLAS detector under the demands of a 5 to 7 times higher collision rate after the high luminosity upgrade of the LHC. This presentation will give an overview and status of the ITk Strip and Pixel detector. It will highlight one major challenge for each of the detectors: the on-module DC-DC powering circuit of the ITk Strip detector and the 65nm readout chip of the ITk Pixel detector. Furthermore I will present a readout concept which could be used as a base for a common ITk readout software core. This core can operate with multiple hardware platforms and user interfaces\, an essential feature for the successful transition from prototyping and production to detector commissioning and operation.
URL:https://rpm.physics.lbl.gov/event/reserved-39/
LOCATION:Zoom Talk\, 50A-5132\, Berkeley\, ca\, 94720
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20170316T160000
DTEND;TZID=America/Los_Angeles:20170316T170000
DTSTAMP:20260422T164921
CREATED:20170117T120837Z
LAST-MODIFIED:20170117T120837Z
UID:439-1489680000-1489683600@rpm.physics.lbl.gov
SUMMARY:Prof. Stacy McGaugh (Case Western) "The Radial Acceleration Relation in Rotationally Supported Galaxies"
DESCRIPTION:ABSTRACT:\nWe report a correlation between the radial acceleration traced by rotation curves and that predicted by the observed distribution of baryons. The same relation is followed by 2693 points in 153 galaxies with very different morphologies\, masses\, sizes\, and gas fractions. The correlation persists even when dark matter dominates. Consequently\, the dark matter contribution is fully specified by that of the baryons. The observed scatter is small and largely dominated by observational uncertainties. This radial acceleration relation is tantamount to a natural law for rotating galaxies.
URL:https://rpm.physics.lbl.gov/event/stacy-mcgaugh-case-western-tba/
LOCATION:Zoom Talk\, 50A-5132\, Berkeley\, ca\, 94720
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20170321T160000
DTEND;TZID=America/Los_Angeles:20170321T170000
DTSTAMP:20260422T164921
CREATED:20170125T103235Z
LAST-MODIFIED:20170125T103235Z
UID:454-1490112000-1490115600@rpm.physics.lbl.gov
SUMMARY:Roger O’Brient (JPL) “The Search for Inflationary Gravitational Waves: Current Status of the BICEP Program and Next Generation Instrumentation.”
DESCRIPTION:Abstract:\nFor over a decade\, the BICEP collaboration has been deploying small aperture telescopes to the South Pole Station to map B-mode polarization in the Cosmic Microwave Background and\nsearch for evidence of primordial gravitational waves. If detected\, they would allow physicists\nto constrain physics at energy scales of ~10 16 GeV levels. To date\, this program places the\ntightest constrains on the tensor-scalar ratio of r<0.07 (95% confidence). We are at an\nimportant point in our program as we transition into “Stage-3” instruments with the BICEP-\narray\, which will search to a level of r>0.01. This rapid progress is fueled by the antenna-\ncoupled superconducting bolometers that we have developed at NASA’s Jet Propulsion\nLaboratory. In my talk\, I’ll summarize the science case for these experiments\, describe the\ninstruments themselves with a focus on the detectors\, discuss the recently collected data\, and\ncomment on the future of our program. In particular\, Thermal KIDs\, an emerging bolometer\ntechnology\, will be critical for this next phase. Finally\, I’ll comment on how LBL and DOE can\nand will play a future role in this exciting frontier of fundamental physics.
URL:https://rpm.physics.lbl.gov/event/reserved-41/
LOCATION:Zoom Talk\, 50A-5132\, Berkeley\, ca\, 94720
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20170323T160000
DTEND;TZID=America/Los_Angeles:20170323T170000
DTSTAMP:20260422T164921
CREATED:20170125T103301Z
LAST-MODIFIED:20170125T103301Z
UID:456-1490284800-1490288400@rpm.physics.lbl.gov
SUMMARY:Megan Eckart (NASA) "X-ray Astrophysics Enabled by Microcalorimeters: from Recent Observations to Next-Generation Technologies"
DESCRIPTION:Abstract:\nHigh-resolution imaging spectroscopy in the soft x-ray waveband (0.1-10 keV) is an essential tool for probing the physics of the x-ray universe. Unique line diagnostics available in this waveband allow transformative scientific observations of a wide array of sources. For example\, measurements of turbulence in the intra-cluster medium of galaxy clusters can be used to calibrate hydrodynamic simulations used in cosmology; and measurements of outflow processes from supermassive black holes may identify the key mechanism that regulates the co-evolution of host galaxies and their central black holes. I will introduce the microcalorimeter\, a low-temperature detector capable of x-ray photon counting with high spectral resolution\, and discuss observations of the Perseus Cluster made using our microcalorimeter instrument that launched aboard the Japanese-led Hitomi (Astro-H) mission in 2016. I will discuss our recent advances using transition-edge-sensor (TES) microcalorimeters and identify areas in detector\, readout\, and instrument development that are needed for next-generation instrumentation for space- and laboratory-based experiments. Techniques and challenges will be compared to those of envisaged cryogenic CMB and direct dark matter detection experiments. 
URL:https://rpm.physics.lbl.gov/event/reserved-42/
LOCATION:Zoom Talk\, 50A-5132\, Berkeley\, ca\, 94720
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20170328T160000
DTEND;TZID=America/Los_Angeles:20170328T170000
DTSTAMP:20260422T164921
CREATED:20170314T075823Z
LAST-MODIFIED:20170314T075823Z
UID:503-1490716800-1490720400@rpm.physics.lbl.gov
SUMMARY:Haichen Wang (LBNL) Title: Search for physics beyond the Standard Model using multijet events with the ATLAS detector at the LHC
DESCRIPTION:Abstract:\nSearch for physics beyond the Standard Model (SM) has been one of the most important goals of the physics program at CERN’s Large Hadron Collider (LHC). Among all the final states\, the multijet final state has long been considered as a challenging one for the search of physics beyond the SM due to its large background. Though\, exciting new physics phenomena\, such as the production of black hole as well as massive supersymmetric (SUSY) particles\, may well result in signals in the multijet final state. I present searches for physics beyond the SM using multijet events from 13 TeV collision data taken in 2015 and the first half of 2016 by the ATLAS experiment at the LHC. I focus on a search for the production of black hole and a search for massive supersymmetric particles decaying to many jets via R-Parity Violating (RPV) couplings. The two examples represent searches targeting physics beyond the SM at different mass scales\, and therefore different analysis strategies are employed. These searches have greatly improved the sensitivity of the LHC to the black hole production and RPV SUSY scenarios\, and they are complementary to searches using events of leptons\, photons and missing transverse energy.
URL:https://rpm.physics.lbl.gov/event/reserved-40/
LOCATION:HYBRID 50A-5132 (Sessler Conference Room)\, https://lbnl.zoom.us/j/91782268585\, 50A-5132
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20170330T160000
DTEND;TZID=America/Los_Angeles:20170330T170000
DTSTAMP:20260422T164921
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
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