CP Violation at ATLAS Tatjana Jovin on behalf of the ATLAS collaboration
CP Violation at ATLAS Tatjana Jovin on behalf of the ATLAS collaboration
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ATLAS 违反 CP 行为 Tatjana Jovin 代表 ATLAS 合作团队
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
T. Jovin
中科院分区：
文献类型：
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作者：
T. Jovin
The Standard Model predicts a tiny CP-violating effect in the Bs-meson system that can be experimentally determined by the ATLAS experiment at LHC, employing a time-dependent analysis of the ‘golden’ φ J/ψ B0 s decay channel to extract the weak mixing phase φ φJ/ψ s . Precise measurement of the mass and lifetime of the B-hadron is crucial for the measurement of the CP-violating quantities. To validate this we test the performance of the ATLAS detector by measuring the mass and lifetime of the 0 s B meson using the φ J/ψ B0 s decay. In parallel, the measurement of the mass and lifetime of the 0 d B meson is performed using the decay channel *0 0 d K J/ψ B , as it represents an excellent control channel. The final state particles from φ J/ψ B0 s and *0 0 d K J/ψ B decays are reconstructed in the ATLAS detector using proton-proton collision data at a center-of-mass energy of 7 TeV corresponding to an integrated luminosity of 40 pb. Within the statistical uncertainties, the fitted masses and lifetimes of both B mesons are consistent with the world average values.
