CERN Accelerating science

ATLAS Slides
Report number	ATL-PHYS-SLIDE-2020-397
Title	Measurement of the CP violation in Bs ->J/ψϕ decays in pp collisions at √s= 13 TeV with the ATLAS detector
Author(s)	Meshkov, Oleg (M.V.Lomonosov Moscow State University)
Corporate author(s)	The ATLAS collaboration
Collaboration	ATLAS Collaboration
Submitted to	5th International Conference on Particle Physics and Astrophysics (ICPPA), pp.ATL-PHYS-SLIDE-2020-397
Submitted by	oleg.meshkov@cern.ch on 13 Oct 2020
Subject category	Particle Physics - Experiment
Accelerator/Facility, Experiment	CERN LHC ; ATLAS
Free keywords	BPHYS
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. Precise measurements of the CKM parameters therefore constrain the Standard Model, and may reveal new physics effects. The measurement of the time–dependent decay rates of Bs -> J/ψϕ provides a theoretically clean method for extracting CP–violating weak mixing phase phi_s. This poster will present the most recent results from ATLAS on the CP-violating mixing phase phi_s and on several other parameters describing the Bs meson system.