Bulletin of the American Physical Society
APS April Meeting 2020
Volume 65, Number 2
Saturday–Tuesday, April 18–21, 2020; Washington D.C.
Session J02: Special Session for the Sakurai, Panofsky and Primakoff Award WinnersInvited Live Prize/Award
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Sponsoring Units: DPF Chair: Young-Kee Kim, University of Chicago Room: Washington 1 |
Sunday, April 19, 2020 1:30PM - 2:06PM Live |
J02.00001: Improving the Sensitivity of Photon and Athermal Phonon Sensors to Search for Dark Matter throughout the Mass Range from 50meV through 500MeV Invited Speaker: Matt Pyle Substantial astronomical observations have established that approximately 25% of the energy density of the universe is composed of cold non-baryonic dark matter, whose detection and characterization could be key to improving our understanding of the laws of physics. Over the past three decades, physicists have largely focused on searching for dark matter within the 10 GeV-1 TeV range (WIMPs), unfortunately without success. These failures motivated a successful theoretical effort to develop well motivated dark matter models throughout a much larger mass range, and now we need to develop the necessary experimental detector technology that is necessary to search for these light mass dark matter candidates. In this talk, we’ll discuss the experimental requirements when searching for dark matter throughout the mass range from 50meV- 500 MeV. We’ll also discuss recent R&D breakthroughs in photon sensor and athermal phonon sensor technology that will enable experiments that are being proposed using silicon, polar crystals, superfluid He, and periodic photonic materials as the detector material. [Preview Abstract] |
Sunday, April 19, 2020 2:06PM - 2:42PM Live |
J02.00002: Encounters with the Axion Invited Speaker: Pierre Sikivie The notion of Peccei-Quinn symmetry with its concomitant axion has been astonishingly fertile, with surprising connections to most subfields of physics. A personal account is given of events, insights and experiments that contributed to its history so far. [Preview Abstract] |
Sunday, April 19, 2020 2:42PM - 3:18PM Live |
J02.00003: The Challenge of Triggering Collider Experiments Invited Speaker: Wesley Smith The data taken by a particle physics collider detector consists of events, which are snapshots of the detector data at specific intervals in time. Usually these snapshots are taken at the frequency of the crossing of the colliding beams. For HERA this was 96 ns, for the Tevatron Run II this was 396 ns and for the LHC this is 25 ns. An individual bunch crossing may contain either no, one or many interactions between the particles in the colliding beams. Not all of the detector data from an individual crossing is available immediately. The selection of bunch crossings by the detector trigger system is a highly complex function that involves a series of levels which take increasing amounts of time, process increasing amounts of data, use increasingly complex algorithms and make increasingly more precise determinations to reject increasing numbers of crossings. The first level(s) of the series usually involve(s) specific custom high-speed electronics. The subsequent level(s) involve more general CPU farms that run code similar to that found in the offline reconstruction. The trigger is the start of the physics event selection process. The challenges, development and evolution of collider detector trigger systems are described. [Preview Abstract] |
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