Measurement of the Ω[superscript 0][subscript c] Baryon Lifetime
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PhysRevLett.121.092003.pdf
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Author(s)
Aaij, R.
Adeva, B.
Adinolfi, M.
Aidala, C. A.
Ajaltouni, Z.
Akar, S.
Albicocco, P.
Albrecht, J.
Alessio, F.
Alexander, M.
Date Issued
August 2018
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Aaij, R. et al. "Measurement of the Ω[superscript 0][subscript c] Baryon Lifetime." Physical Review Letters 121, 9 (August 2018): 092003 © 2018 CERN, for the LHCb Collaboration
Version
Final published version
Abstract
We report a measurement of the lifetime of the Ω[subscript 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[subscript b]⁻→Ω[subscript c]⁰μ⁻ν[over ¯][subscript μ]X signal decays, where the Ω[subscript c]⁰ baryon is detected in the pK⁻K⁻π⁺ final state and X represents possible additional undetected particles in the decay. The Ω[subscript c]⁰ lifetime is measured to be τΩ[subscript 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.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
http://dx.doi.org/10.1103/PhysRevLett.121.092003
