We report a measurement of the lifetime of the Ω0c 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− → Ω0c μ− anti-ν_μ X signal decays, where the Ω0c baryon is detected in the p K− K− π+ final state and X represents possible additional undetected particles in the decay. The Ω0c lifetime is measured to be τ_Ω0c = 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 Ω0c Baryon Lifetime. PHYSICAL REVIEW LETTERS, 121(9), 1-10 [10.1103/PhysRevLett.121.092003].

Measurement of the Ω0c Baryon Lifetime

Betti, F.;Capriotti, L.;Carbone, A.;Ferrari, F.;Galli, D.;Marconi, U.;Patrignani, C.;Perazzini, S.;Pisani, F.;Vagnoni, V.;Zucchelli, S.
2018

Abstract

We report a measurement of the lifetime of the Ω0c 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− → Ω0c μ− anti-ν_μ X signal decays, where the Ω0c baryon is detected in the p K− K− π+ final state and X represents possible additional undetected particles in the decay. The Ω0c lifetime is measured to be τ_Ω0c = 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.
2018
Aaij, R., Adeva, B., Adinolfi, M., Aidala, C., Ajaltouni, Z., Akar, S., et al. (2018). Measurement of the Ω0c Baryon Lifetime. PHYSICAL REVIEW LETTERS, 121(9), 1-10 [10.1103/PhysRevLett.121.092003].
Aaij, R.; Adeva, B.; Adinolfi, M.; Aidala, C.A.; Ajaltouni, Z.; Akar, S.; Albicocco, P.; Albrecht, J.; Alessio, F.; Alexander, M.; Alfonso Albero, A.;...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/641962
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