Measurement of CP violation and mixing in Bs0 → J/ψφ in ATLAS

被引：0
|
作者：
Jakoubek, Tomas [1 ]
机构：
[1] Czech Acad Sci, Inst Phys, Na Slovance 1999-2, Prague 18221, Czech Republic
来源：
NUCLEAR AND PARTICLE PHYSICS PROCEEDINGS | 2020年 / 309卷
关键词：
CP Violation; Bs J/psi Phi; ATLAS; CERN; B Physics; Flavour Physics;
D O I：
10.1016/j.nuclphysbps.2019.11.025
中图分类号：
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号：
摘要：
An overview of a measurement of time-dependent CP asymmetry parameters in B-s(0 )-> J/psi(mu(+) mu(-))phi(K+ K-) decays using 80.5 fb(-1) of integrated luminosity collected with the ATLAS detector from 13 TeV pp collisions at the LHC is presented. A manifestation of the CP violation is an interference between direct and mixing-mediated B-s(0) decays, producing a common final state. In the Standard Model, it is characterized by a phase shift phi(s) related to the CKM matrix. In the case of B-s(0) -> J/psi phi, this shift is predicted to be small, phi(s) = -0.0363(-0.0015)(+0.0016) rad. New physics can enhance phi(s) whilst satisfying all existing constraints. Results presented in this talk are compatible with those obtained from 19.2 fb(-1) of 7 TeV and 8 TeV data as well as with the Standard Model predictions and other LHC measurements.
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收藏
页码：148 / 151
页数：4
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