Measurement of the Λ^0_b lifetime in pp collisions at √s = 7 TeV

S. Chatrchyan, A. Apresyan,A. Bornheim, J. Bunn, Y. Chen,E. Di Marco,J. Duarte,D. Kcira,Y. Ma, A. Mott,H. B. Newman, C. Rogan,M. Spiropulu,V. Timciuc,J. Veverka,R. Wilkinson, S. Xie, Y. Yang,R. Y. Zhu, F. A. Dias,M. Dubinin

user-5da93e5d530c70bec9508e2b（2013）

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摘要

A measurement of the Λ^0_b lifetime using the decay Λ^0_b → J/ψΛ in proton-proton collisions at √s = 7TeV is presented. The data set, corresponding to an integrated luminosity of about 5 fb^(-1), was recorded with the CMS experiment at the Large Hadron Collider using triggers that selected dimuon events in the J/ψ mass region. The Λ^0_b lifetime is measured to be 1.503 ± 0.052 (stat.) ± 0.031 (syst.) ps.

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关键词

Luminosity (scattering theory),Large Hadron Collider,Nuclear physics,Physics

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