| J/ψ→μ+μ- reconstruction in the CMS experiment |
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| 作者单位： | State Key Laboratory of Nuclear Science and Technology, Peking University, Beijing 100871, China |
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| 基金项目： | 国家自然科学基金，科技部资助项目 |
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| 摘 要： | In this paper the J/ψ→μ+μ- reconstruction performance in the CMS experiment at the LHC is studied in detail by using B5→ J/ψψ →μμКК events. The reconstruction efficiencies of J/ψ mesons and their decay muons are obtained as a function of the transverse momentum PT and the pseudo-rapidity η. We also study the muon trigger efficiency for this channel with the planned Level-1 trigger and High Level Trigger selection criteria. It was observed that the muon reconstruction efficiency decreases when the two decay muons have a small or large 3D angular separation, which further affects the overall J/ψ reconstruction efficiency.
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| 关 键 词： | J/ψ |
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