Measurement of the CP-violating phase ϕsand the Bs0meson decay width difference with Bs 0→ J/ψϕ decays in ATLAS

G Aad; B Abbott; J Abdallah; O Abdinov; R Aben; M Abolins; Torsten Åkesson; Simona Bocchetta; LENE Bryngemark; Caterina Doglioni; Anders Floderus; Anthony Hawkins; Vincent Hedberg; Jenny Ivarsson; Göran Jarlskog; Else Lytken; Ulf Mjörnmark; Oxana Smirnova; Oleksandr Viazlo; ATLAS Collaboration

doi:10.1007/JHEP08(2016)147

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Measurement of the CP-violating phase ϕsand the Bs0meson decay width difference with Bs 0→ J/ψϕ decays in ATLAS

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Measurement of the CP-violating phase ϕsand the Bs0meson decay width difference with Bs 0→ J/ψϕ decays in ATLAS

G Aad, B Abbott, J Abdallah, O Abdinov, R Aben, M Abolins, Torsten Åkesson, Simona Bocchetta, LENE Bryngemark, Caterina Doglioni, …

The journal of high energy physics, Vol.2016(8), 147

2016

DOI: 10.1007/JHEP08(2016)147

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Abstract

A measurement of the Bs0decay parameters in the Bs0→ J/ψϕ channel using an integrated luminosity of 14.3 fb−1collected by the ATLAS detector from 8 TeV pp collisions at the LHC is presented. The measured parameters include the CP -violating phase ϕs, the decay width Γs and the width difference between the mass eigenstates ΔΓs. The values measured for the physical parameters are statistically combined with those from 4.9 fb−1of 7 TeV data, leading to the following: Φs = -0.090 ± 0.078 (stat.) ± (syst.) rad Δ Γs = 0.085 ± 0.011 (stat.) ± 0.007 (syst.) Ps-1 Δ Γs = 0.675 ± 0.003 (stat.) ± 0.03 (syst.) Ps-1 In the analysis the parameter ΔΓs is constrained to be positive. Results for ϕs and ΔΓs are also presented as 68% and 95% likelihood contours in the ϕs-ΔΓs plane. Also measured in this decay channel are the transversity amplitudes and corresponding strong phases. All measurements are in agreement with the Standard Model predictions.[Figure not available: see fulltext.] © 2016, The Author(s).

Natural Sciences

Physical Sciences

B physics

CP violation

Flavor physics

Fysik

Hadron-Hadron scattering (experiments)

Naturvetenskap

Subatomic Physics

Subatomär fysik

Details

Title: Subtitle: Measurement of the CP-violating phase ϕsand the Bs0meson decay width difference with Bs 0→ J/ψϕ decays in ATLAS
Creators: G Aad - Aix-Marseille Université
B Abbott - University of Oklahoma
J Abdallah - Academia Sinica
O Abdinov - Azerbaijan National Academy of Sciences
R Aben - University of Amsterdam
M Abolins - Michigan State University
Torsten Åkesson - Particle Physics
Simona Bocchetta - Particle Physics
LENE Bryngemark - Particle Physics
Caterina Doglioni - Particle Physics
Anders Floderus - Particle Physics
Anthony Hawkins - Particle Physics
Vincent Hedberg - Particle Physics
Jenny Ivarsson - Particle Physics
Göran Jarlskog - Particle Physics
Else Lytken - Particle Physics
Ulf Mjörnmark - Particle Physics
Oxana Smirnova - Particle Physics
Oleksandr Viazlo - Particle Physics
ATLAS Collaboration
Contributors: U Mallik (Contributor) - University of Iowa, Physics and Astronomy
Resource Type: Journal article
Publication Details: The journal of high energy physics, Vol.2016(8), 147
DOI: 10.1007/JHEP08(2016)147
ISSN: 1029-8479
eISSN: 1029-8479
Language: English
Date published: 2016
Academic Unit: Physics and Astronomy
Record Identifier: 9984200053602771

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