Volume 390 -
40th International Conference on High Energy physics (ICHEP2020) -
Parallel: Quark and Lepton Flavour Physics
Measurement of the weak mixing phase $\phi_s$ through time-dependent $CP$ violation in $B_s^0 \to J/\psi\phi$ decay in ATLAS
Full text:
pdf
Pre-published on:
February 25, 2021
Published on:
April 15, 2021
Abstract
An updated measurement of time-dependent $CP$ asymmetry parameters in $B_s^0 \to J/\psi(\mu^+\mu^-)\phi(K^+K^-)$ decays using 80.5 fb$^{-1}$ of integrated luminosity collected with the ATLAS detector during 2015-2017 from 13 TeV $pp$ collisions at the LHC is presented. In the Standard Model, $CP$ violation arises due to a single complex phase in the CKM quark mixing matrix. Precise measurements of the CKM parameters therefore constrain the Standard Model, and may reveal new physics effects. Results presented in this talk are compatible with those obtained from 19.2 fb$^{-1}$ of 7 TeV and 8 TeV ATLAS data as well as with the Standard Model predictions and other LHC experiments. The measurement of the weak mixing phase $\phi_s$ improves on the precision of the previous ATLAS result by a factor of two.
DOI: https://doi.org/10.22323/1.390.0387
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
Copyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
Copyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.