Bulletin of the American Physical Society
APS April Meeting 2016
Volume 61, Number 6
Saturday–Tuesday, April 16–19, 2016; Salt Lake City, Utah
Session R17: Quark Flavor |
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Sponsoring Units: DPF Chair: Alexey Petrov, Wayne University Room: 251E |
Monday, April 18, 2016 10:45AM - 10:57AM |
R17.00001: Muon g-2 at Fermilab: Magnetic Field Preparations for a New Physics Search Brendan Kiburg The Muon $g-2$ experiment at Fermilab will measure the muon’s anomalous magnetic moment, $a_{\mu}$, to 140 parts-per-billion. Modern calculations for $a_{\mu}$ differ from the current experimental value by 3.6$\sigma$. Our effort will test this discrepancy by collecting 20 times more muons and implementing several upgrades to the well-established storage ring technique. The experiment utilizes a superconducting electromagnet with a 7-meter radius and a uniform 1.45-Tesla magnetic field to store $\approx 10^{4}$ muons at a time. The times, energies, and locations of the subsequent decay positrons are determined and combined with magnetic field measurements to extract $a_{\mu}$. This talk will provide a brief snapshot of the current discrepancy. The role and requirements of the precision magnetic field will be described. Recent progress to establish the required magnetic field uniformity will be highlighted. [Preview Abstract] |
Monday, April 18, 2016 10:57AM - 11:09AM |
R17.00002: ABSTRACT WITHDRAWN |
Monday, April 18, 2016 11:09AM - 11:21AM |
R17.00003: Higher-Order Systematic Effects in the Muon Beam-Spin Dynamics for Muon g-2 Jason Crnkovic, Hugh Brown, Brandon Krouppa, Eric Metodiev, William Morse, Yannis Semertzidis, Vladimir Tishchenko The BNL Muon g-2 Experiment (E821) produced a precision measurement of the muon anomalous magnetic moment, where as the Fermilab Muon g-2 Experiment (E989) is an upgraded version of E821 that has a goal of producing a measurement with approximately 4 times more precision. Improving the precision requires a more detailed understanding of the experimental systematic effects, and so three higher-order systematic effects in the muon beam-spin dynamics have recently been found and estimated for E821. The beamline systematic effect originates from muon production in beamline spectrometers, as well as from muons traversing beamline bending magnets. The kicker systematic effect comes from a combination of the variation in time spent inside the muon storage ring across a muon bunch and the temporal structure of the storage ring kicker waveform. Finally, the detector systematic effect arises from a combination of the energy dependent muon equilibrium orbit in the storage ring, muon decay electron drift time, and decay electron detector acceptance effects. [Preview Abstract] |
Monday, April 18, 2016 11:21AM - 11:33AM |
R17.00004: Search for Light Higgs at Belle and Prospects at Belle II Ilsoo Seong The NMSSM theory suggests an additional light CP-odd Higgs boson which can be produced in $\Upsilon $ transitions and decay to invisible particles. We attempt to find evidence for on-shell and off-shell production of the light Higgs in $\Upsilon $(1S) decays via tagged dipion transitions from $\Upsilon $(2S) to $\Upsilon $(1S) at Belle. We investigate final states with a single high energy photon and missing energy. In this talk, we will report on the current status of this search and on future prospect at Belle II which will collect 50 times greater luminosity than Belle. [Preview Abstract] |
Monday, April 18, 2016 11:33AM - 11:45AM |
R17.00005: Exotic heavy-quark states at Belle XiaoLong Wang, Leo Piilonen The search for multi-quark states beyond the meson (quark-antiquark) and baryon (three-quark) has resulted in the discovery of many new exotic states of matter, starting with the X(3872) discovery by Belle in 2003. We report selected recent results on searches for such states at Belle. [Preview Abstract] |
Monday, April 18, 2016 11:45AM - 11:57AM |
R17.00006: Status and prospects for SuperKEKB and BEAST (Commissioning Detector) Igal Jaegle The Belle II experiment at the SuperKEKB collider in Tsukuba, Japan, will start taking physics data in 2018 and will accumulate 50 $\mathrm{ab}^{-1}$ of e+e- collision data, about 50 times larger than the data set of the earlier Belle experiment. The new detector will use GEANT4 for Monte Carlo simulation and an entirely new software and reconstruction system based on modern computing tools. Examples of physics simulation including beam background overlays will be described. [Preview Abstract] |
Monday, April 18, 2016 11:57AM - 12:09PM |
R17.00007: The upgraded KLM detector at Belle II Leo Piilonen We describe the KLM (KLong-Muon) detector for the Belle II detector at the SuperKEKB accelerator located at KEK in Tsukuba, Japan. The endcap RPC (Resistive Plate Chamber) detectors used for Belle have been entirely replaced with a scintillator-based system readout out with Si PMTs. The inner two layers of the barrel have also been replaced. The readout using ``oscilloscope on a chip''-based readout electronics will be discussed, as well as expected physics performance. [Preview Abstract] |
Monday, April 18, 2016 12:09PM - 12:21PM |
R17.00008: The iTOP particle identification detector at Belle II Shawn Dubey We describe the iTOP (imaging Time Of Propagation) detector in the Belle detector at the SuperKEKB accelerator, located at KEK in Tsukuba, Japan. The principle of operation, readout and the expected kaon/pion separation capabilities will be described. Status of the detector construction and integration will be discussed. [Preview Abstract] |
Monday, April 18, 2016 12:21PM - 12:33PM |
R17.00009: Distributed Computing at Belle II Vikas Bansal The Belle II experiment at the SuperKEKB collider in Tsukuba, Japan, will start physics data taking in 2018 and will accumulate 50 $\mathrm{ab}^{-1}$ of e+e- collision data, about 50 times larger than the data set of the earlier Belle experiment. The computing requirements of Belle II are comparable to those of a RUN I high-$p_T$ LHC experiment. Computing will make full use of high speed networking and of the Computing Grids in North America, Asia and Europe. Results of an initial MC simulation campaign with 5 $\mathrm{ab}^{-1}$ equivalent luminosity will be described. [Preview Abstract] |
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