Title
Measurement of the CP-violating weak phase <tex>$\phi_{s}$</tex> and the decay width difference <tex>$\Delta\Gamma_{s}$</tex> using the <tex>$B_{s}^{0}\rightarrow J/\psi\phi(1020)$</tex> decay channel in pp collisions at <tex>$\sqrt{s}$</tex>=8 TeV Measurement of the CP-violating weak phase <tex>$\phi_{s}$</tex> and the decay width difference <tex>$\Delta\Gamma_{s}$</tex> using the <tex>$B_{s}^{0}\rightarrow J/\psi\phi(1020)$</tex> decay channel in pp collisions at <tex>$\sqrt{s}$</tex>=8 TeV
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
Amsterdam ,
Subject
Physics
Source (journal)
Physics letters: B. - Amsterdam, 1967, currens
Volume/pages
757(2016) , p. 97-120
ISSN
0370-2693
ISI
000376800300014
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
The CP-violating weak phase phi(s) of the B-s(0) meson and the decay width difference Delta Gamma(s) of the B-s(0) light and heavy mass eigenstates are measured with the CMS detector at the LHC using a data sample of B-s(0)-> J/psi phi(1020) -> mu(+)mu-K+K- decays. The analysed data set corresponds to an integrated luminosity of 19.7 fb(-1) collected in pp collisions at a centre-of-mass energy of 8 TeV. A total of 49200 reconstructed B-s(0) decays are used to extract the values of phi(s) and Delta Gamma(s) by performing a time dependent and flavour-tagged angular analysis of the mu(+)mu-K+K- final state. The weak phase is measured to be phi(s) =-0.075 +/- 0.097 (stat) +/- 0.031 (syst) rad, and the decay width difference is Delta Gamma(s) = 0.095 +/- 0.013 (stat) +/- 0.007 (syst) ps(-1). (C) 2016 CERN for the benefit of the CMS Collaboration. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). Funded by SCOAP(3).
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Full text (open access)
https://repository.uantwerpen.be/docman/irua/dbcad4/134195.pdf
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