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Measurement of the $Ξ_b^-$ and $Ω_b^-$ baryon lifetimes

Abstract:

Using a data sample of pp collisions corresponding to an integrated luminosity of $3~ \rm fb^{-1}$, the $\Xi_b^-$ and $\Omega_b^-$ baryons are reconstructed in the $\Xi_b^- \rightarrow J/\psi \Xi^-$ and $\Omega_b^- \rightarrow J/\psi \Omega^-$ decay modes and their lifetimes measured to be $\tau (\Xi_b^-) = 1.55\, ^{+0.10}_{-0.09}~{\rm(stat)} \pm 0.03\,{\rm(syst)}$ ps, $\tau (\Omega_b^-) = 1.54\, ^{+0.26}_{-0.21}~{\rm(stat)} \pm 0.05\,{\rm(syst)}$ ps. These are the most precise determin...

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Publication status:
Published

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Journal:
Phys. Lett. B
Volume:
736
Issue:
4
Pages:
154-162
Publication date:
2014-05-07
DOI:
ISSN:
0370-2693
URN:
uuid:5cdf0ce1-9f41-413a-b4b2-f44d170fc657
Source identifiers:
21618
Local pid:
pubs:21618
Keywords:

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