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The SLAC ATLAS group
The ATLAS group at SLAC is large, and rapidly grown as we anticipate the start of LHC physics. ATLAS is supported as a top priority of SLAC, taking over from BaBar as the main high-energy physics activity. We have two professors (Su Dong, Ariel Schwartzman), several senior researchers (Tim Barklow, Rainer Bartoldus, Norman Graf, Richard Mount, Tim Nelson, Charlie Young), a Panofsky Fellow (Andy Haas), 7 postdocs, and 7 students. In addition, there is also a strong team of staff scientists and engineers with computing and detector expertise for our experimental involvement.
Physics
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Our physics activities focus on searches for new physics. Searches are underway for gluinos which have come to rest in the calorimeter and decay during empty bunch crossings, excess like-sign leptons, a 4th generation quark, R-Parity violating Supersymmetry, light pseudoscalar Higgs in the NMSSM, long-lived particles in Hidden Valley models, "lepton-jets" and "quirks". Our SUSY search efforts are concentrating on the b+MET+jets final-state, which also involves the study of top quark pair production as validation for the b+MET reconstruction and estimation of a major background to SUSY to S
USY searches. Another key physics venue is the reconstruction of heavily boosted objects through jet substructure which is a distinctive new high energy playground at the LHC. Many tools are developed for use in these analyses, and for use by the collaboration as a whole, such as an algorithm which matches clusters of tracks with jets in the calorimeter, studies s
tudies of jet calibration, b-tagging, b-jet triggering, and b/c-jet separation. SLAC is a Tier2 computing facility, and provides strong support for data analysis and simulation efforts.
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