publication . Article . 2016

Measurement of the relative width difference of the B-0-(B)over-bar(0) system with the ATLAS detector

Aaboud, M.; Aad, G.; Abbott, B.; Abdallah, J.; Abdinov, O.; Abeloos, B.; Aben, R.; AbouZeid, O. S.; Abraham, N. L.; Abramowicz, H.; ...
Open Access English
  • Published: 14 Jun 2016
  • Publisher: SPRINGER
Abstract
This paper presents the measurement of the relative width difference ΔΓd/Γd of the B0-B¯¯¯¯0B0-B¯0 system using the data collected by the ATLAS experiment at the LHC in pp collisions at s√=7s=7 TeV and s√=8s=8 TeV and corresponding to an integrated luminosity of 25.2 fb−1. The value of ΔΓd/Γd is obtained by comparing the decay-time distributions of B0 → J/ψKS and 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.
Funded by
NSERC
Project
  • Funder: Natural Sciences and Engineering Research Council of Canada (NSERC)
Download from
UCL Discovery
Article . 2016

[5] Particle Data Group collaboration, K.A. Olive et al., Review of particle physics, Chin.

[6] C. Bobeth, U. Haisch, A. Lenz, B. Pecjak and G. Tetlalmatzi-Xolocotzi, On new physics in

[8] I. Dunietz, R. Fleischer and U. Nierste, In pursuit of new physics with Bs decays, Phys. Rev.

Abstract
This paper presents the measurement of the relative width difference ΔΓd/Γd of the B0-B¯¯¯¯0B0-B¯0 system using the data collected by the ATLAS experiment at the LHC in pp collisions at s√=7s=7 TeV and s√=8s=8 TeV and corresponding to an integrated luminosity of 25.2 fb−1. The value of ΔΓd/Γd is obtained by comparing the decay-time distributions of B0 → J/ψKS and 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.
Funded by
NSERC
Project
  • Funder: Natural Sciences and Engineering Research Council of Canada (NSERC)
Download from
UCL Discovery
Article . 2016

[5] Particle Data Group collaboration, K.A. Olive et al., Review of particle physics, Chin.

[6] C. Bobeth, U. Haisch, A. Lenz, B. Pecjak and G. Tetlalmatzi-Xolocotzi, On new physics in

[8] I. Dunietz, R. Fleischer and U. Nierste, In pursuit of new physics with Bs decays, Phys. Rev.

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