Phys. Rev. Lett. 76, 4462–4467 (1996)

Measurement of the B^- and B̅ ⁰ Meson Lifetimes Using Semileptonic Decays

Abstract

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F. Abe et al. (CDF Collaboration)
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Received 20 February 1995; published in the issue dated 10 June 1996

The lifetimes of the B^- and B̅ ⁰ mesons are measured using the partially reconstructed semileptonic decays B̅ →Dℓ^-ν̅ X, where D is either a D⁰ or D^*+ meson. The data were collected by the CDF detector at the Fermilab Tevatron collider during 1992–1993 and correspond to 19.3 pb^-1 of p̅ p collisions at √s = 1.8 TeV. We measure the decay length distributions and find the lifetimes to be τ(B^-) = 1.56±0.13±0.06 ps and τ(B̅ ⁰) = 1.54±0.08±0.06 ps, and the ratio of lifetimes to be τ(B^-)/τ(B̅ ⁰) = 1.01±0.11±0.02, where the first uncertainties are statistical and the second are systematic.

URL:

http://link.aps.org/doi/10.1103/PhysRevLett.76.4462

DOI:

10.1103/PhysRevLett.76.4462

PACS:

13.20.He, 14.40.Nd

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Phys. Rev. Lett. 76, 4462–4467 (1996)

Measurement of the B- and B̅ 0 Meson Lifetimes Using Semileptonic Decays

Measurement of the B^- and B̅ ⁰ Meson Lifetimes Using Semileptonic Decays