Mixing and CP Violation in the Bd and B s Systems at ATLAS

7th International Conference on Beauty, Charm, and Hyperons in Hadronic Interactions

Barton, A.E.^1

Physics Department, Lancaster University, Lancaster

LA1 4YB, United Kingdom^1

关键词: ATLAS experiment;    CP violations;    Decay parameters;    Decay time;    Decay widths;    Eigenstates;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/770/1/012026/pdf
DOI  :  10.1088/1742-6596/770/1/012026

来源: IOP

【 摘 要 】

This note includes a measurement of the Bosdecay parameters in the Bs→J/ψφ channel and a measurement of the B0meson proper decay time and decay width using the statistics collected by the ATLAS experiment in Run I of the LHC. The first result presents the measurement of the CP -violating phase φs, the decay width Γsand the width difference between the mass eigenstates ΔΓs. The second result presents the measurement of the width difference ΔΓd, which is extracted from the measurement of the lifetime dependence of B0→J/ψKsand B0→J/ψK∗ decays. The obtained results are φs= 0.098 0.084(stat.) 0.040(syst.) rad. and ΔΓd/Γd= (-0.1 1.1(stat.) 0.9(syst.)) 10-2.