PoS - Proceedings of Science
Volume 364 - European Physical Society Conference on High Energy Physics (EPS-HEP2019) - Flavour Physics and CP Violation
Measurement of the weak mixing phase $\phi_s$ through time-dependent CP violation in $B_s^0\rightarrow J/\psi \phi$ decay in ATLAS
A.E. Barton* on behalf of the ATLAS collaboration
*corresponding author
Full text: Not available
Abstract
In the Standard Model of particle physics, CP violation arises due to a single complex phase in the Cabibbo-Kobayashi-Maskawa (CKM) quark mixing matrix. Testing the validity of the CKM mechanism as a source of CP violation is one of the major experimental challenges in particle physics today. Precise measurement of the CKM parameters therefore constrains the Standard Model, and may reveal effects beyond it. Measurement of the time-dependent decay rates of $B_s^0\rightarrow J/\psi \phi$ provides a theoretically clean method for extracting the CP-violating weak mixing phase $\phi_{s}$. The Standard Model predicts $\phi_s$ to be very small and it is very well constrained, while in many new physics models large $\phi_s$ values are expected. Small deviations in a measurement of $\phi_s$ would be hints for the existence of the new particles.
The most recent results on the CP-violating mixing phase $\phi_s$ and several other parameters describing the $B_s^0$ meson system are presented from ATLAS, using $\sqrt{s}=13$ TeV proton-proton collision data from the LHC, are presented.
How to cite

Metadata are provided both in "article" format (very similar to INSPIRE) as this helps creating very compact bibliographies which can be beneficial to authors and readers, and in "proceeding" format which is more detailed and complete.

Open Access
Creative Commons LicenseCopyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.