Measurement of the Λb0 Lifetime in Λb0 -&gt; J/ψΛ0 in pp Collisions at s√=1.96  TeV

CDF Collaboration

doi:10.1103/PhysRevLett.98.122001

Scientific article

English

Measurement of the Λ_b⁰ Lifetime in Λ_b⁰ -> J/ψΛ⁰ in pp Collisions at s√=1.96 TeV

ContributorsCDF Collaboration

CollaboratorsCampanelli, Mario; Clark, Allan Geoffrey; Donega, Mauro; Moed, Shulamit; Sfyrla, Anna; Vallecorsa, Sofia; Wu, Xin

Published inPhysical review letters, vol. 98, no. 12, 122001

Publication date2007

Abstract

We report a measurement of the Λ0b lifetime in the exclusive decay Λ0b→J/ψΛ0 in pp collisions at s√=1.96 TeV using an integrated luminosity of 1.0 fb−1 of data collected by the CDF II detector at the Fermilab Tevatron. Using fully reconstructed decays, we measure τ(Λ0b)=1.593+0.083−0.078(stat)±0.033(syst) ps. This is the single most precise measurement of τ(Λ0b) and is 3.2σ higher than the current world average.

Affiliation entities

Faculté des sciences / Section de physique / Département de physique nucléaire et corpusculaire

Citation (ISO format)

CDF Collaboration. Measurement of the Λ_b⁰ Lifetime in Λ_b⁰ -> J/ψΛ⁰ in pp Collisions at s√=1.96 TeV. In: Physical review letters, 2007, vol. 98, n° 12, p. 122001. doi: 10.1103/PhysRevLett.98.122001

Article (Published version)

Identifiers

PID : unige:38378
DOI : 10.1103/PhysRevLett.98.122001

Additional URL for this publicationhttp://journals.aps.org/prl/abstract/10.1103/PhysRevLett.98.122001

Journal ISSN0031-9007

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Measurement of the Λb0 Lifetime in Λb0 -> J/ψΛ0 in pp Collisions at s√=1.96 TeV

Technical informations

Measurement of the Λ_b⁰ Lifetime in Λ_b⁰ -> J/ψΛ⁰ in pp Collisions at s√=1.96 TeV