Abstract: This paper presents the measurement of the relative width difference ΔΓd/Γd 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 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.[Figure not available: see fulltext.]
CITATION STYLE
The ATLAS collaboration, Aaboud, M., Aad, G., Abbott, B., Abdallah, J., Abdinov, O., … Zwalinski, L. (2016). Measurement of the relative width difference of the B0‐ B¯ 0 system with the ATLAS detector. Journal of High Energy Physics, 2016(6). https://doi.org/10.1007/JHEP06(2016)081
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