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

The ATLAS Collaboration

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8 Citations (Scopus)


Abstract: This paper presents the measurement of the relative width difference ΔΓdd of the B0‐ B¯ 0 system 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 ΔΓdd is obtained by comparing the decay-time distributions of B0 → J/ψKS and B0 → J/ψK*0(892) decays. The result is ΔΓdd = (−0.1±1.1 (stat.)± 0.9 (syst.)) × 10−2. Currently, this is the most precise single measurement of ΔΓdd. It agrees with the Standard Model prediction and the measurements by other experiments.[Figure not available: see fulltext.]

Original languageEnglish
Article number81
JournalJournal of High Energy Physics
Issue number6
Publication statusPublished - 2016 Jun 1


  • B physics
  • Hadron-Hadron scattering (experiments)

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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