Measurement of the Ω<i><sub>c</sub></i><SUP>0</SUP> Baryon Lifetime

Aaij, R, Collaboration, LHCb, Adeva, B, Adinolfi, M, Aidala, CA, Ajaltouni, Z, Akar, S, Albicocco, P, Albrecht, J, Alessio, F
et al (show 829 more authors) (2018) Measurement of the Ω<i><sub>c</sub></i><SUP>0</SUP> Baryon Lifetime. PHYSICAL REVIEW LETTERS, 121 (9). 092003-.

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We report a measurement of the lifetime of the Ω_{c}^{0} baryon using proton-proton collision data at center-of-mass energies of 7 and 8 TeV, corresponding to an integrated luminosity of 3.0  fb^{-1} collected by the LHCb experiment. The sample consists of about 1000  Ω_{b}^{-}→Ω_{c}^{0}μ^{-}ν[over ¯]_{μ}X signal decays, where the Ω_{c}^{0} baryon is detected in the pK^{-}K^{-}π^{+} final state and X represents possible additional undetected particles in the decay. The Ω_{c}^{0} lifetime is measured to be τ_{Ω_{c}^{0}}=268±24±10±2  fs, where the uncertainties are statistical, systematic, and from the uncertainty in the D^{+} lifetime, respectively. This value is nearly four times larger than, and inconsistent with, the current world-average value.

Item Type: Article
Additional Information: 7 pages, 2 figures. All figures and tables, along with any supplementary material and additional information, are available at
Uncontrolled Keywords: LHCb Collaboration
Depositing User: Symplectic Admin
Date Deposited: 03 Dec 2018 10:04
Last Modified: 14 Mar 2024 23:30
DOI: 10.1103/PhysRevLett.121.092003
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