Recent ATLAS results Woochun USC Physics Seminar April 13, 2011 The ATLAS detector Heavy Flavor Physics at ATLAS Observation of Charmonium, Upsilon.

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Presentation transcript:

Recent ATLAS results Woochun USC Physics Seminar April 13, 2011 The ATLAS detector Heavy Flavor Physics at ATLAS Observation of Charmonium, Upsilon & Charm Mesons Inclusive differential cross-section of J/  production and Charm Mesons. Measurement of the fraction of non-prompt J/  decays & non- prompt cross sections Exclusive B-meson decays. Higgs Search at ATLAS (not today) Summary and Outlook April 13, 2011W. Park USC Physics Seminar1

April 13, 2011W. Park USC Physics Seminar2

The ATLAS Muon Spectrometer Crucial measurement by CSC before toroidal field and materials. High counting rate area near the beam axis ( > 200Hz/cm 2 ) Excellent track resolution ~60  m. Good two track resolution Good time resolution ~7ns 3 planes of trigger and precision chambers individually o Barrel: sagitta measurement o Endcap: point-angle measurement MDT TGC CSC RPC April 13, 2011W. Park USC Physics Seminar3

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Observation of  cJ (1P) Measurement of the  c cross-section in 7TeV pp collision is interesting topic being actively worked by many theorists. Theoretical prediction of the  c production cross-sections is difficult due to P-wave divergences in the theory. One of the significant uncertainty of J/  cross-section measurement is  c contribution through  J/  Measurement of  c cross-section will benefic J/  cross-section measurement. Two approaches: – Calorimetric Photon Information – Tracking Photon Information (ee pair conversion) W. Park USC Physics Seminar7April 13, 2011 Mass (MeV) Mass-M(J/  BF(%) of  J/   c ± 0.08  c ± 1.5  c ± 0.8

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D *+ Cross-section Measurement using D 0  K3  April 13, 2011 Validated result with independent decay channel. W. Park USC Physics Seminar12

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Evaluate Tracking Performance D *+  D 0  ; D 0  K3  D *+  D 0  ; D 0  K  April 13, 2011W. Park USC Physics Seminar16

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