Bulletin of the American Physical Society
2013 Annual Fall Meeting of the APS Prairie Section
Volume 58, Number 15
Thursday–Saturday, November 7–9, 2013; Columbia, Missouri
Session B1: Particle Physics I |
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Chair: Bahram Mashhoon, University of Missouri Room: Memorial Union Benton Bingham |
Friday, November 8, 2013 8:30AM - 9:06AM |
B1.00001: Higgs Boson Properties and Prospects Invited Speaker: Mark Neubauer In this talk, I will present what is known about the Higgs boson from measurements at the Large Hadron Collider. I will also discuss searches for other Higgs bosons and prospects for improved understanding of the Higgs boson properties. [Preview Abstract] |
Friday, November 8, 2013 9:06AM - 9:18AM |
B1.00002: Observation of a Z boson produced in association with a charm quark at the Fermilab Tevatron Jessica Seckler, Keith Matera, Kevin Pitts The production of W and Z bosons in conjunction with heavy quarks has been the object of study at the Tevatron and LHC. In addition to testing the standard model, understanding these processes is relevant to studies of the Higgs boson as well as searches for new physics. We present a new analysis of Z boson plus charm production with the CDF detector at the Fermilab Tevatron using fully reconstructed D* decays. [Preview Abstract] |
Friday, November 8, 2013 9:18AM - 9:30AM |
B1.00003: Particle Assignment in the ttH Production Channel of the Higgs Boson Emma Molden Even though the Large Hadron Collider has been shut down for improvements since February 2013, there is still an abundance of data to investigate. We focused on looking for the Higgs boson in a production channel where it is produced in association with two top quarks. When searching for the Higgs boson in a collision it is necessary to reconstruct the mass of the Higgs boson to improve the signal-to-noise ratio, which requires correct particle assignment. I present a method of particle assignment for the ttH production channel, used on simulated data from the ATLAS detector. This production channel could reveal information about this newly-discovered particle that has potential to open new doors in the search for new physics beyond our current understanding. [Preview Abstract] |
Friday, November 8, 2013 9:30AM - 9:42AM |
B1.00004: The Complete Test Results of 1800 Multi-Anode Photomultiplier Tubes for CMS-HF Calorimeter Upgrade Emrah Tiras The Compact Muon Solenoid (CMS) is one of the two large general-purpose particle detectors used with the Large Hadron Collider (LHC) project at CERN. The Hadronic Forward (HF) calorimeters cover the polar angles from 0.78$^{\circ}$ to 5.70$^{\circ}$ with respect to the beam direction at each end of the CMS detector. The HF plays important roles in identifying tagging jets, measuring the luminosity and determining the missing transverse energy. Currently, the HF undergoes upgrades (2013 and 2014) to deal with larger beam currents and higher center-of-mass energy collisions expected in the LHC Run-II starting in 2015. The High Energy Physics (HEP) group at the University of Iowa is responsible for characterization and installation of 1800 multi-anode photo-multiplier tubes (PMT), testing of readout boxes and light guide systems and the replacement of the front-end electronics. We are also participating in simulation studies to understand the expected performance of the upgraded HF. In this talk, the complete test results of multi-anode PMTs for several different parameters are presented. These results can provide insights about the expected performance of the upgraded CMS-HF detector. [Preview Abstract] |
Friday, November 8, 2013 9:42AM - 9:54AM |
B1.00005: Proposal to search for $D^{0}\rightarrow\mu^{+}\mu^{-}$ decay at CMS Suleyman Durgut We propose to use $D^{0}\rightarrow\varphi\rho$ as the normalization for search of $D^{0}\rightarrow\mu^{+}\mu^{-}$ at CMS. The branching fraction of flavor changing natural current decay (FCNC) $D^{0}\rightarrow\mu^{+}\mu^{-}$ is about $10^{-13}$ by SM. They decay via box diagrams in the short distance limit, but SUSY quarks and wino can contribute to the box diagrams can significantly enhance it. The charm meson decays are constraining couplings to up-type quarks not necessarily constrained by B decays, thus presents and immaculate and unexplored region to search for new physics. The current BF limit is $6\times10^{-9}$ at $90\%$ confidence level by LHCb. CMS PAS paper (BPH-11-017) sets limit to $5\times10^{-7}$ at $90\%$ confidence limit based on $90pb^{-1}$ of data. This is certainly an important channel to search for new physics. [Preview Abstract] |
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