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Scientific article
Open access
English

Measurement of the CP-violating phase ϕ s and the B s 0 meson decay width difference with B s 0 → J

ContributorsATLAS Collaboration
Published inThe journal of high energy physics, vol. 1608, p. 147-192
Collection
  • Open Access - SCOAP3
Publication date2016
Abstract

A measurement of the B s 0 decay parameters in the B s 0 → J / ψϕ channel using an integrated luminosity of 14.3 fb −1 collected by the ATLAS detector from 8 TeV pp collisions at the LHC is presented. The measured parameters include the CP -violating phase ϕ s , the decay width Γ s and the width difference between the mass eigenstates ΔΓ s . The values measured for the physical parameters are statistically combined with those from 4.9 fb −1 of 7 TeV data, leading to the following: ϕ s = − 0.090 ± 0.078 stat . ± 0.041 syst . rad Δ Γ s = 0.085 ± 0.011 stat . ± 0.007 syst . ps − 1 Γ s = 0.675 ± 0.003 stat . ± 0.003 syst . ps − 1 . $$ \begin{array}{l}{\phi}_s=-0.090\pm 0.078\left(\mathrm{stat}.\right)\pm 0.041\left(\mathrm{syst}.\right)\mathrm{rad}\\ {}\varDelta {\varGamma}_s=0.085\pm 0.011\left(\mathrm{stat}.\right)\pm 0.007\left(\mathrm{syst}.\right){\mathrm{ps}}^{-1}\\ {}{\varGamma}_s=0.675\pm 0.003\left(\mathrm{stat}.\right)\pm 0.003\left(\mathrm{syst}.\right){\mathrm{ps}}^{-1}.\end{array} $$

Keywords
  • B physics
  • CP violation
  • Flavor physics
  • Hadron-Hadron scattering (experiments)
Citation (ISO format)
ATLAS Collaboration. Measurement of the CP-violating phase ϕ s and the B s 0 meson decay width difference with B s 0 → J. In: The journal of high energy physics, 2016, vol. 1608, p. 147–192. doi: 10.1007/JHEP08(2016)147
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Article (Published version)
Identifiers
ISSN of the journal1029-8479
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Creation10/12/2016 12:01:56 PM
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