A Study of the decay width difference in the $B^0_s - B^0_s$ system using $phi correlations

ALEPH Collaboration, The and Barate, R. and Bowdery, Christopher and Finch, Alexander and Foster, Frank and Hughes, Gareth and Jones, Roger (2000) A Study of the decay width difference in the $B^0_s - B^0_s$ system using $phi correlations. Physics Letters B, 486 (3-4). pp. 286-299. ISSN 0370-2693

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In a data sample of about four million hadronic Z decays recorded with the ALEPH detector from 1991 to 1995, the decay is observed, based on tagging the final state with two φ mesons in the same hemisphere. The final state is mostly CP even and corresponds to the short-lived B0s mass eigenstate. The branching ratio of this decay is measured to be . A measurement of the lifetime of the B0s(short) gives 1.27±0.33±0.08 ps. The lifetime and branching ratio measurements provide two essentially independent methods of estimating the relative decay width difference ΔΓ/Γ in the B0s– system, corresponding to an average value ΔΓ/Γ=(25+21−14)%.

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Journal Article
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Physics Letters B
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08 May 2013 10:24
Last Modified:
21 Nov 2022 23:40