The first observation of the Ωb− → Ξc+ K− π− decay is reported using pp collision data at center of mass energies of 7, 8, and 13 TeV collected by the LHCb experiment, corresponding to an integrated luminosity of 9 fb^−1. Four excited Ωc0 baryons are observed in the Ξc+ K− mass projection of the Ωb− → Ξc+ K− π− decays with the significance of each exceeding five standard deviations. They coincide with the states previously observed in prompt pp and e+ e− production. Relative production rates, masses, and natural widths of the states are measured, and a test of spin hypotheses is performed. Moreover, the branching ratio of Ωb− → Ξc+ K− π− is measured relative to the Ωb− → Ωc0 π− decay mode and a precise measurement of the Ωb− mass of 6044.3 ± 1.2 ± 1.1{−0.22}{+0.19} MeV is obtained.

Aaij, R., Abellán Beteta, C., Ackernley, T., Adeva, B., Adinolfi, M., Afsharnia, H., et al. (2021). Observation of Excited Ωc0 Baryons in Ωb− → Ξc+ K− π− Decays. PHYSICAL REVIEW D, 104(9), 1-14 [10.1103/PhysRevD.104.L091102].

Observation of Excited Ωc0 Baryons in Ωb− → Ξc+ K− π− Decays

Capriotti, L.;Carbone, A.;Ferrari, F.;Galli, D.;Maccolini, S.;Manuzzi, D.;Patrignani, C.;Pisani, F.;Villa, A.;Zucchelli, S.;
2021

Abstract

The first observation of the Ωb− → Ξc+ K− π− decay is reported using pp collision data at center of mass energies of 7, 8, and 13 TeV collected by the LHCb experiment, corresponding to an integrated luminosity of 9 fb^−1. Four excited Ωc0 baryons are observed in the Ξc+ K− mass projection of the Ωb− → Ξc+ K− π− decays with the significance of each exceeding five standard deviations. They coincide with the states previously observed in prompt pp and e+ e− production. Relative production rates, masses, and natural widths of the states are measured, and a test of spin hypotheses is performed. Moreover, the branching ratio of Ωb− → Ξc+ K− π− is measured relative to the Ωb− → Ωc0 π− decay mode and a precise measurement of the Ωb− mass of 6044.3 ± 1.2 ± 1.1{−0.22}{+0.19} MeV is obtained.
2021
Aaij, R., Abellán Beteta, C., Ackernley, T., Adeva, B., Adinolfi, M., Afsharnia, H., et al. (2021). Observation of Excited Ωc0 Baryons in Ωb− → Ξc+ K− π− Decays. PHYSICAL REVIEW D, 104(9), 1-14 [10.1103/PhysRevD.104.L091102].
Aaij, R.; Abellán Beteta, C.; Ackernley, T.; Adeva, B.; Adinolfi, M.; Afsharnia, H.; Aidala, C.A.; Aiola, S.; Ajaltouni, Z.; Akar, S.; Albrecht, J.; A...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/849181
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