Bulletin of the American Physical Society
APS April Meeting 2010
Volume 55, Number 1
Saturday–Tuesday, February 13–16, 2010; Washington, DC
Session Y12: Searches for New Physics |
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Sponsoring Units: DPF Chair: Sarah Eno, University of Maryland Room: Virginia A |
Tuesday, February 16, 2010 1:30PM - 1:42PM |
Y12.00001: Search for trilepton chargino-neutralino signal at CDF Marcelo Vogel, Michael Gold, John Strologas The production of chargino-neutralino and their subsequent leptonic decay is one of the most promising supersymmetry (SUSY) signatures at the Tevatron collider. We present the status of a CDF search for trilepton and missing transverse energy final states. To increase our sensitivity to SUSY signals (or any other new phenomena) we include low-$p_T$ electrons and muons ($p_T>5$~GeV/$c$), low dilepton masses ($M_{\ell\ell}>10$~GeV/$c^2$), forward leptons ($|\eta|>1$), isolated tracks, and tau-jets from hadronic tau decays. Special care is taken for the light-flavor and heavy-flavor QCD background that is significant in some of the kinematic regions we explore. [Preview Abstract] |
Tuesday, February 16, 2010 1:42PM - 1:54PM |
Y12.00002: ABSTRACT WITHDRAWN |
Tuesday, February 16, 2010 1:54PM - 2:06PM |
Y12.00003: Search for Hadronic Resonances in Multijet Final States Tim Lou, Eva Halkiadakis, Dean Hidas, Amitabh Lath We describe an analysis to search for a new hadronic resonance using the CDF detector at Fermilab. Although the search is intended to be model independent, we model the signal using R-parity violating supersymmetry with gluino pair production in a six jet final state. We make use of final state correlations and create an ensemble of jet combinations to distinguish the signal from the multi-jet QCD backgrounds. We also apply this technique to ``search'' for top quark pairs in the all hadronic channel. Successfully applying this method on a known process such as top provides a convincing demonstration of the method, as well as a control sample for our heavy resonance search. [Preview Abstract] |
Tuesday, February 16, 2010 2:06PM - 2:18PM |
Y12.00004: ABSTRACT WITHDRAWN |
Tuesday, February 16, 2010 2:18PM - 2:30PM |
Y12.00005: Search for Stopped Gluinos during Beam-off Periods at CMS Kenneth Rossato Several models of new physics, including split supersymmetry, predict the existence of a heavy particle which is long-lived on timescales of the bunch spacing of the LHC. Such particles may be slowed through $dE/dx$ losses and stop in the volume of the CMS detector before ultimately decaying. We describe a search strategy that employs a special jet trigger to look for energy depositions in the hadronic calorimeter during time periods without $pp$ collisions. We examine the potential for discovery and exclusion of gluinos in split supersymmetry in early running of the LHC. [Preview Abstract] |
Tuesday, February 16, 2010 2:30PM - 2:42PM |
Y12.00006: Searching for High Speed CHAMPs at the LHC Todd Adams, Jie Chen Charged, massive particles with long lifetimes (CHAMPs) are predicted by many new theories that extend the standard model. Traditional searches involve looking for slow moving, highly ionizing particles. However, we show that the large center of mass energy of the LHC allows for CHAMPs that that are fast. We have developed a method to separate fast CHAMPs from fast muons, thereby increasing the discovery potential of early LHC data. [Preview Abstract] |
Tuesday, February 16, 2010 2:42PM - 2:54PM |
Y12.00007: A Search for Charged Massive Long-Lived Particles at the Fermilab Tevatron Sungwoong Cho We report on an updated search for Charged Massive Long-Lived Particles (CMLLPs) by the DZero Experiment at the Fermilab Tevatron Collider. CMLLPs are predicted in many theories beyond the Standard Model. The search is based on the signature of two particles reconstructed as muons but with speed and invariant mass of the two particles inconsistent with muons produced in beam-beam collisions. This analysis updates a previous DZero analysis with a larger data sample and improved analysis methods. We present limits for a variety of possible CMLLP models. [Preview Abstract] |
Tuesday, February 16, 2010 2:54PM - 3:06PM |
Y12.00008: ABSTRACT WITHDRAWN |
Tuesday, February 16, 2010 3:06PM - 3:18PM |
Y12.00009: Search for High-Mass Resonance in the Vector Boson + Jets Channel with 5.4 fb-1 of Data Seth Caughron A search for heavy resonances is performed in the vector boson + jets channel using 5.4 fb$^{-1}$ of data collected by the D0 experiment in $p\bar{p}$ collisionsepat a center-of-mass energy of 1.96 TeV. This dataset contains millions of W boson events and the invariant mass distributions of various combinations of objects are studied to search for new resonances. [Preview Abstract] |
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