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.

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

Capriotti, L.;
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.
File in questo prodotto:
File Dimensione Formato  
2021-AR-39-Obs_of_Exc_Omegac0_Baryons_in_Omegabm_to_Xicp_Km_pim-PRD.pdf

accesso aperto

Tipologia: Published (Publisher's Version of Record)
Licenza: Creative commons
Dimensione 523.19 kB
Formato Adobe PDF
523.19 kB Adobe PDF Visualizza/Apri
Pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11577/3582739
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 47
  • ???jsp.display-item.citation.isi??? 28
  • OpenAlex ND
social impact