Bulletin of the American Physical Society
82nd Annual Meeting of the APS Southeastern Section
Volume 60, Number 18
Wednesday–Saturday, November 18–21, 2015; Mobile, Alabama
Session C2: Hadronic Physics I |
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Chair: Simonetta Luiti, University of Virginia Room: Riverview Plaza Hotel Mobile Bay Ballroom II |
Thursday, November 19, 2015 1:30PM - 1:42PM |
C2.00001: New Physics Search with Bottomonium Decays at BABAR Experiment Romulus Godang Motivated by the recent astrophysical observations, the searches for the light Higgs boson and dark matter have been performed at the BABAR experiment by studying the radiative decays of the Upsilon(nS) resonances, with n$=$1,2,3 and the multi particle production in e$+$e- annihilation processes. In this presentation I will summarize the stringent limit on the production of a light Higgs boson and the dark matter. [Preview Abstract] |
Thursday, November 19, 2015 1:42PM - 1:54PM |
C2.00002: The Radiative Decay of B Meson to K*0 Gamma at the Belle II Experiment Steven Hinson, Romulus Godang We report a study of the radiative decay of B meson to K*0 Gamma at the Belle II Experiment. The study is based on a simulated Monte Carlo data sample containing B meson pairs on the Upsilon(4S) resonance collected by the Belle II detector. Belle II detector is located at the collision of electron-positron asymmetry-energy collider at the SuperKEKB storage ring in Tsukuba, Japan. [Preview Abstract] |
Thursday, November 19, 2015 1:54PM - 2:06PM |
C2.00003: Quadrupole Doublet Channel and Septa Emittance Exchange for Muon Collider Final Cooling John Acosta, Donald Summers, Terrence Hart, Lucien Cremaldi, Sandra Oliveros, David Neuffer The Muon Collider requires a low emittance $\epsilon_{6D}=0.044mm^{3}$ muon beam to get a luminosity of $\mathcal{L} \simeq10^{34}cm^{-2}s^{-1}$ to produce enough rare events. The muons are generated from pion decays that produce a muon beam with a very high emittance. To reduce the emittance two ionization cooling channels have been simulated that reduce the 6D normalized emittance to as low as $\epsilon_{6D}=0.123mm^{3}$, almost a factor of a million. However, the 6D emittance required by a muon collider is $\epsilon_{6D}=0.044mm^{3}$. We propose a final cooling channel composed of quadrupole doublets limited to 14 Tesla that provide strong focusing. The low $\beta^{*}$ regions, as low as 5 mm, are occupied by dense, low Z absorbers that cool the beam. Quadrupole channel emittances are based on calculations rather than full simulations at this point. After final cooling, normalized xyz emittances of (0.071, 0.141, 2.4) mm-rad are exchanged into (0.025, 0.025, 70) mm-rad as required by a collider. The beam is divided by 16 electrostatic septa into 17 channels.After that, a series of RF deflector cavities, as used in CLIC tests, form a 3.7 m long bunch train. Snap bunch coalescence combines the 17 bunches into one in a 21 GeV ring in 55 microseconds. [Preview Abstract] |
Thursday, November 19, 2015 2:06PM - 2:18PM |
C2.00004: Results of stress tests for the Belle II conditions database Mwangi Edward, Joffe David Belle II is a high-energy physics experiment that is aimed at the discovery of new physics in the decays of b quarks produced through electron-positron annihilation events produced at the KEK laboratory in Tsukuba, Japan. The conditions database for the experiment stores and makes accessible information related to the calibration of the detectors at the time of each event. When the Belle II experiment begins running, many simultaneous connections to the conditions database are likely to be initiated. This raises the need to run stress tests against the conditions database to establish its robustness at the expected rates of access. In order to carry out the stress tests a series of cases were formulated and used to observe the behavior of the database when they were applied. Scripts to run the test were coded and run, and the resulting metrics are presented. [Preview Abstract] |
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