We report a measurement of the lifetime of the Ωc0 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 Ωb- → Ωc0 μ- νˉ(μ)X signal decays, where the Ωc0 baryon is detected in the pK-K-π+ final state and X represents possible additional undetected particles in the decay. The Ωc0 lifetime is measured to be τ(Ωc0) = 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.

Aaij, R., Adeva, B., Adinolfi, M., Aidala, C., Ajaltouni, Z., Akar, S., et al. (2018). Measurement of the Ωc0 Baryon Lifetime. PHYSICAL REVIEW LETTERS, 121(9), 092003 [10.1103/PhysRevLett.121.092003].

Measurement of the Ωc0 Baryon Lifetime

Belloli, N.;Borsato, M.;Calvi, M.;Carniti, P.;Cassina, L.;Fazzini, D.;Gotti, C.;Martinelli, M.;Matteuzzi, C.;Petruzzo, M.;
2018

Abstract

We report a measurement of the lifetime of the Ωc0 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 Ωb- → Ωc0 μ- νˉ(μ)X signal decays, where the Ωc0 baryon is detected in the pK-K-π+ final state and X represents possible additional undetected particles in the decay. The Ωc0 lifetime is measured to be τ(Ωc0) = 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.
Articolo in rivista - Articolo scientifico
Physics and Astronomy (all)
English
2018
121
9
092003
092003
none
Aaij, R., Adeva, B., Adinolfi, M., Aidala, C., Ajaltouni, Z., Akar, S., et al. (2018). Measurement of the Ωc0 Baryon Lifetime. PHYSICAL REVIEW LETTERS, 121(9), 092003 [10.1103/PhysRevLett.121.092003].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/215445
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