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Measurement of the Ξ−b and Ω−b baryon lifetimes


LHCb Collaboration; Bernet, R; Müller, K; Steinkamp, O; Straumann, U; Vollhardt, A; et al (2014). Measurement of the Ξ−b and Ω−b baryon lifetimes. Physics Letters B, 736:154-162.

Abstract

Using a data sample of pp collisions corresponding to an integrated luminosity of 3 fb−1, the Ξ−b and Ω−b baryons are reconstructed in the Ξ−b→J/ψΞ− and Ω−b→J/ψΩ− decay modes and their lifetimes measured to be τ(Ξ−b)=1.55+0.10−0.09 (stat)±0.03(syst) ps, τ(Ω−b)=1.54+0.26−0.21 (stat)±0.05(syst) ps. These are the most precise determinations to date. Both measurements are in good agreement with previous experimental results and with theoretical predictions.

Abstract

Using a data sample of pp collisions corresponding to an integrated luminosity of 3 fb−1, the Ξ−b and Ω−b baryons are reconstructed in the Ξ−b→J/ψΞ− and Ω−b→J/ψΩ− decay modes and their lifetimes measured to be τ(Ξ−b)=1.55+0.10−0.09 (stat)±0.03(syst) ps, τ(Ω−b)=1.54+0.26−0.21 (stat)±0.05(syst) ps. These are the most precise determinations to date. Both measurements are in good agreement with previous experimental results and with theoretical predictions.

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Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Language:English
Date:May 2014
Deposited On:20 Feb 2015 22:34
Last Modified:14 Feb 2018 23:16
Publisher:Elsevier
ISSN:0370-2693
OA Status:Gold
Free access at:Publisher DOI. An embargo period may apply.
Publisher DOI:https://doi.org/10.1016/j.physletb.2014.06.064

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