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Measurement of the Lambda(b) lifetime in the exclusive decay Lambda(b) ---> J / psi Lambda [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy, 2007.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description
7 pages : digital, PDF file
Additional Creators
Fermi National Accelerator Laboratory, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
We have measured the λ{sub b} lifetime using the exclusive decay λ{sub b}→J/ψλ, based on 1.2 fb⁻¹ of data collected with the D0 detector during 2002-2006. From 171 reconstructed λ{sub b} decays, where the J/ψ and λ are identified via the decays J/ψ→μ⁺μ⁻ and λ→pπ, we measured the λ{sub b} lifetime to be τ(λ{sub b})=1.218{sub -0.115}{sup +0.130}(stat)±0.042(syst) ps. We also measured the B° lifetime in the decay B°→J/ψ(μ⁺μ⁻)K{sub S}°(π⁺π⁻) to be τ(B°)=1.501{sub -0.074}{sup +0.078}(stat)±0.050(syst) ps, yielding a lifetime ratio of τ(λ{sub b})/τ(B°)=0.811{sub -0.087}{sup +0.096}(stat)±0.034(syst = )
Report Numbers
E 1.99:fermilab-pub-07-094-e
fermilab-pub-07-094-e
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Note
Published through SciTech Connect.
04/01/2007.
"fermilab-pub-07-094-e"
"arXiv eprint number arXiv:0704.3909"
Phys.Rev.Lett.99:142001,2007 AC
Abbott, B.; Abolins, M.; Acharya, B.S.; Adams, M.; Aguilo, E.; Ahsan, M.; Abazov, V.M.; Adams, T.; Alexeev, G.D.; Alkhazov, G.; Ahn, S.H.
Funding Information
AC02-07CH11359
View MARC record | catkey: 14706930