Measurement of the CP-violating phase ϕ<inf>s</inf>and the B<inf>s</inf><sup>0</sup>meson decay width difference with B<inf>s</inf><sup>0</sup>→ J/ψϕ decays in ATLAS

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.]

Metadata

Item Type:	Article
Authors/Creators:	The, ATLASC Aad, G Abbott, B Abdallah, J Abdinov, O Aben, R Abolins, M AbouZeid, OS Abramowicz, H Abreu, H Abreu, R Abulaiti, Y Acharya, BS Adamczyk, L Adams, DL Adelman, J Adomeit, S Adye, T Affolder, AA Agatonovic-Jovin, T Agricola, J Aguilar-Saavedra, JA Ahlen, SP Ahmadov, F Aielli, G Akerstedt, H Åkesson, TPA Akimov, AV Alberghi, GL Albert, J Albrand, S Alconada Verzini, MJ Aleksa, M Aleksandrov, IN Alexa, C Alexander, G Alexopoulos, T Alhroob, M Alimonti, G Alio, L Alison, J Alkire, SP Allbrooke, BMM Allport, PP Aloisio, A Alonso, A Alonso, F Alpigiani, C Altheimer, A Alvarez Gonzalez, B Álvarez Piqueras, D Alviggi, MG Amadio, BT Amako, K Amaral Coutinho, Y Amelung, C Amidei, D Amor Dos Santos, SP Amorim, A Amoroso, S Amram, N Amundsen, G Anastopoulos, C Ancu, LS Andari, N Andeen, T Anders, CF Anders, G Anders, JK Anderson, KJ Andreazza, A Andrei, V Angelidakis, S Angelozzi, I Anger, P Angerami, A Anghinolfi, F Anisenkov, AV Anjos, N Annovi, A Antonelli, M Antonov, A
Copyright, Publisher and Additional Information:	© The Author(s) 2016. JHEP is an open-access journal funded by SCOAP3 and licensed under CC BY 4.0
Keywords:	B physics; CP violation; Flavor physics; Hadron-Hadron scattering (experiments)
Dates:	Published: 24 August 2016 Published (online): 24 August 2016 Accepted: 20 August 2016
Institution:	The University of Sheffield
Academic Units:	The University of Sheffield > Faculty of Science (Sheffield) > Department of Physics and Astronomy (Sheffield)
Depositing User:	Symplectic Sheffield
Date Deposited:	28 Sep 2016 14:30
Last Modified:	28 Sep 2016 14:30
Published Version:	http://dx.doi.org/10.1007/JHEP08(2016)147
Status:	Published
Publisher:	Springer Verlag
Refereed:	Yes
Identification Number:	10.1007/JHEP08(2016)147
Open Archives Initiative ID (OAI ID):	oai:eprints.whiterose.ac.uk:105240

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Measurement of the CP-violating phase ϕ<inf>s</inf>and the B<inf>s</inf><sup>0</sup>meson decay width difference with B<inf>s</inf><sup>0</sup>→ J/ψϕ decays in ATLAS

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