publication . Article . 2016

Measurement of the relative width difference of the B0‐ B¯0system with the ATLAS detector

The ATLAS collaboration,; Aaboud, M; Aad, G; Abbott, B; Abdallah, J; Abdinov, O; Abeloos, B; Aben, R; AbouZeid, OS; Abraham, NL; ...
Open Access English
  • Published: 01 Jun 2016
  • Publisher: eScholarship, University of California
© 2016, The Author(s). Abstract: This paper presents the measurement of the relative width difference ΔΓd/Γdof the B0‐ B¯0system using the data collected by the ATLAS experiment at the LHC in pp collisions at s=7 TeV and s=8 TeV and corresponding to an integrated luminosity of 25.2 fb−1. The value of ΔΓd/Γdis obtained by comparing the decay-time distributions of B0→ J/ψKSand B0→ J/ψK*0(892) decays. The result is ΔΓd/Γd= (−0.1±1.1 (stat.)± 0.9 (syst.)) × 10−2. Currently, this is the most precise single measurement of ΔΓd/Γd. It agrees with the Standard Model prediction and the measurements by other experiments.[Figure not available: see fulltext.]
free text keywords: B physics, Hadron-Hadron scattering (experiments)
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