The first search for the doubly heavy Ωbc0 baryon and a search for the Ξbc0 baryon are performed using pp collision data collected via the LHCb experiment from 2016 to 2018 at a centre-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 5.2 fb - 1. The baryons are reconstructed via their decays to Λc+ π- and Ξc+ π-. No significant excess is found for invariant masses between 6700 and 7300, in a rapidity range from 2.0 to 4.5 and a transverse momentum range from 2 to 20 MeV/c2. Upper limits are set on the ratio of the Ωbc0 and Ξbc0 production cross-section times the branching fraction to Λc+ π- (Ξc+ π-) relative to that of the Λb0 (Ξb0) baryon, for different lifetime hypotheses, at 95% confidence level. The upper limits range from 0.5 × 10-4 to 2.5 × 10-4 for the Ωbc0 → Λc+ π- (Ξbc0 → Λc+ π-) decay, and from 1.4 × 10-3 to 6.9 × 10-3 for the Ωbc0 → Ξc+ π- (Ξbc0 → Λc+ π-) decay, depending on the considered mass and lifetime of the Ωbc0 (Ξbc0) baryon.

Search for the doubly heavy baryons Ωbc0and Ξbc0decaying to Λc+π- And Ξc+π- And c

Neri N.;Petrolini A.;Spadaro Norella E.;
2021-01-01

Abstract

The first search for the doubly heavy Ωbc0 baryon and a search for the Ξbc0 baryon are performed using pp collision data collected via the LHCb experiment from 2016 to 2018 at a centre-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 5.2 fb - 1. The baryons are reconstructed via their decays to Λc+ π- and Ξc+ π-. No significant excess is found for invariant masses between 6700 and 7300, in a rapidity range from 2.0 to 4.5 and a transverse momentum range from 2 to 20 MeV/c2. Upper limits are set on the ratio of the Ωbc0 and Ξbc0 production cross-section times the branching fraction to Λc+ π- (Ξc+ π-) relative to that of the Λb0 (Ξb0) baryon, for different lifetime hypotheses, at 95% confidence level. The upper limits range from 0.5 × 10-4 to 2.5 × 10-4 for the Ωbc0 → Λc+ π- (Ξbc0 → Λc+ π-) decay, and from 1.4 × 10-3 to 6.9 × 10-3 for the Ωbc0 → Ξc+ π- (Ξbc0 → Λc+ π-) decay, depending on the considered mass and lifetime of the Ωbc0 (Ξbc0) baryon.
File in questo prodotto:
Non ci sono file associati a questo prodotto.

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/11567/1160076
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 26
  • ???jsp.display-item.citation.isi??? 25
social impact