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  • 學位論文

在8 TeV質心能量的質子對撞實驗中尋找Bc介子至Bs介子衰變事件

Search for B c to Bs pi decay from proton-proton colisions at sqrt(s) = 8 TeV

指導教授 : 張寶棣
共同指導教授 : 陳凱風(Kai-Feng Chen)

摘要


本論文經由分析在質心能量8 TeV、累計亮度20.65 fb^(-1)之質子—質子對撞事件下,測量B c to Bs pi衰變。經由分析,我們共觀測到81+-19個事件,此衰變相對於B c to J/psi pi 衰變之衰變比例為(1.7+0.5-0.7(stat.)+-0.5(syst.))x10^3。

並列摘要


We report a search of the decay B c to Bs pi with a data sample of 20.65 fb^(-1) in proton-proton collisions at sqrt(s) = 8 TeV collected by the CMS experiment at the LHC. With 81+- 19 events observed, the ratio of branching fraction, B(B c to Bs pi)/B(B c to J/psi pi) is measured to be (1.7+0.5-0.7(stat.)+-0.5(syst.))x10^3.

並列關鍵字

Standard Model LHC CMS Bc meson B physics

參考文獻


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[5] Chao-Hsi Chang, Chafik Driouichi, Paula Eerola, and Xing-Gang Wu. Bcvegpy: an event generator for hadronic production of the bc meson. Computer Physics Communications, 159(3):192 – 224, 2004.
[6] Chao-Hsi Chang, Jian-Xiong Wang, and Xing-Gang Wu. Bcvegpy2.0: An upgraded version of the generator bcvegpy with the addition of hadroproduction of the p-wave states. Computer Physics Communications, 174(3):241 – 251, 2006.
[7] Measurement of the Bs lifetime difference. Technical Report CMS-PAS-BPH-11-006, CERN, Geneva, 2012.

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