J/ψ→μ+μ reconstruction in the CMS experiment

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YANG Zong-Chang and QIAN Si-Jin. J/ψ→μ+μ reconstruction in the CMS experiment[J]. Chinese Physics C, 2009, 33(3): 161-169. doi: 10.1088/1674-1137/33/3/001
YANG Zong-Chang and QIAN Si-Jin. J/ψ→μ+μ reconstruction in the CMS experiment[J]. Chinese Physics C, 2009, 33(3): 161-169.  doi: 10.1088/1674-1137/33/3/001 shu
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Received: 2008-08-06
Revised: 2008-08-30
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J/ψ→μ+μ reconstruction in the CMS experiment

    Corresponding author: QIAN Si-Jin,

Abstract: 

In this paper the J/ψ→μ+μ reconstruction performance in the CMS experiment at the LHC is studied in detail by using Bs→J/ψ φ→μμKK 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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