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Volume 377 - 18th International Conference on B-Physics at Frontier Machines (Beauty2019) - CPV B mesons
CP violation in $B_s^0\rightarrow J/\psi \phi$ in the ATLAS experiment
R. Novotny
Full text: pdf
Pre-published on: 2020 January 27
Published on:
Abstract
The measurement of the $CP$-violation and other physics parameters in the $B_s^0\rightarrow J/\psi(\mu^+\mu^-)\phi(K^+ K^-)$ channel using data collected by the ATLAS detector from 13 TeV $pp$ collisions at the LHC with integrated luminosity of 80.5 fb$^{-1}$ is presented.
In addition to the $CP$-violating phase $\phi_s$ and the width difference $\Delta\Gamma_s$ between the $B_s^0$ meson mass eigenstates, the average decay width $\Gamma_s$ and the transversity amplitudes including corresponding strong phases are measured. The measured values are then combined with those from 19.2 fb$^{-1}$ of 7 TeV and 8 TeV data. All measurements are in agreement with the Standard Model predictions and other LHC measurements.
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