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Effective lifetime measurements in the B0s→K+K−, B0→K+π− and B0s→π+K− decays


LHCb Collaboration; Bernet, R; Müller, K; Steinkamp, O; Straumann, U; Serra, N; Vollhardt, A; et al (2014). Effective lifetime measurements in the B0s→K+K−, B0→K+π− and B0s→π+K− decays. Physics Letters B, 736:446-454.

Abstract

Measurements of the effective lifetimes in the B0s→K+K−, B0→K+π− and B0s→π+K− decays are presented using 1.0 fb−1 of pp collision data collected at a centre-of-mass energy of 7 TeV by the LHCb experiment. The analysis uses a data-driven approach to correct for the decay time acceptance. The measured effective lifetimes are τB0s→K+K− = 1.407 ± 0.016 ± 0.007 ps, τB0→K+π− = 1.524 ± 0.011 ± 0.004 ps, τB0s→π+K− = 1.60 ± 0.06 ± 0.01 ps. This is the most precise determination to date of the effective lifetime in the B0s→K+K− decay and provides constraints on contributions from physics beyond the Standard Model to the B0s mixing phase and the width difference ΔΓs.

Abstract

Measurements of the effective lifetimes in the B0s→K+K−, B0→K+π− and B0s→π+K− decays are presented using 1.0 fb−1 of pp collision data collected at a centre-of-mass energy of 7 TeV by the LHCb experiment. The analysis uses a data-driven approach to correct for the decay time acceptance. The measured effective lifetimes are τB0s→K+K− = 1.407 ± 0.016 ± 0.007 ps, τB0→K+π− = 1.524 ± 0.011 ± 0.004 ps, τB0s→π+K− = 1.60 ± 0.06 ± 0.01 ps. This is the most precise determination to date of the effective lifetime in the B0s→K+K− decay and provides constraints on contributions from physics beyond the Standard Model to the B0s mixing phase and the width difference ΔΓs.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Language:English
Date:2014
Deposited On:20 Feb 2015 22:06
Last Modified:05 Apr 2016 19:00
Publisher:Elsevier
ISSN:0370-2693
Free access at:Publisher DOI. An embargo period may apply.
Publisher DOI:https://doi.org/10.1016/j.physletb.2014.07.051

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