Flavor tagged time-dependent angular analysis of the Bs0 →J/ψφ decay and extraction of ΔΓs and the weak phase φs in ATLAS

Atlas Collaboration

研究成果: Contribution to journalArticle査読

43 被引用数 (Scopus)

抄録

A measurement of the Bs0→J/ψφ decay parameters, updated to include flavor tagging is reported using 4.9fb-1 of integrated luminosity collected by the ATLAS detector from s=7TeV pp collisions recorded in 2011 at the LHC. The values measured for the physical parameters are φs=0.12±0.25(stat)±0.05(syst)radΔΓs=0.053±0.021(stat)±0.010(syst)ps-1Γs=0.677±0.007(stat)±0.004(syst)ps-1|A (0)|2=0.220±0.008(stat)±0.009(syst)|A0(0)|2=0.529±0.006(stat)±0.012(syst)δ=3.89±0.47(stat)±0.11(syst)radwhere the parameter ΔΓs is constrained to be positive. The S-wave contribution was measured and found to be compatible with zero. Results for φs and ΔΓs are also presented as 68% and 95% likelihood contours, which show agreement with the Standard Model expectations.

本文言語英語
論文番号052007
ジャーナルPhysical Review D - Particles, Fields, Gravitation and Cosmology
90
5
DOI
出版ステータス出版済み - 9 23 2014

All Science Journal Classification (ASJC) codes

  • 核物理学および高エネルギー物理学
  • 物理学および天文学(その他)

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