Mixing and CP Violation in the Bd and Bs Systems at ATLAS

Barton, Adam Edward (2016) Mixing and CP Violation in the Bd and Bs Systems at ATLAS. Journal of Physics: Conference Series, 770 (1): 012026. ISSN 1742-6588

Abstract

This note includes a measurement of the Bos decay parameters in the Bs→J/ψØ channel and a measurement of the B0 meson 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 Øs, the decay width Γs and 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/ψKs and B0→J/ψK*° decays. The obtained results are Øs = 0.098 ± 0.084(stat.) ± 0.040(syst.) rad. and ΔΓd/Γd = (-0.1 ± 1.1(stat.) ± 0.9(syst.)) × 10-2.