Using pp collision data corresponding to 1.0  fb−1 integrated luminosity collected by the LHCb detector, two narrow states are observed in the Λ0bπ+π− spectrum with masses 5911.97±0.12(stat)±0.02(syst)±0.66(Λ0b  mass)  MeV/c2 and 5919.77±0.08(stat)±0.02(syst)±0.66(Λ0b  mass)  MeV/c2. The significances of the observations are 5.2 and 10.2 standard deviations, respectively. These states are interpreted as the orbitally excited Λ0b baryons, Λ*0b(5912) and Λ*0b(5920).

Observation of Excited Λ0b Baryons

CARDINALE, ROBERTA;FONTANELLI, FLAVIO;PATRIGNANI, CLAUDIA;PETROLINI, ALESSANDRO;SANNINO, MARIO;
2012-01-01

Abstract

Using pp collision data corresponding to 1.0  fb−1 integrated luminosity collected by the LHCb detector, two narrow states are observed in the Λ0bπ+π− spectrum with masses 5911.97±0.12(stat)±0.02(syst)±0.66(Λ0b  mass)  MeV/c2 and 5919.77±0.08(stat)±0.02(syst)±0.66(Λ0b  mass)  MeV/c2. The significances of the observations are 5.2 and 10.2 standard deviations, respectively. These states are interpreted as the orbitally excited Λ0b baryons, Λ*0b(5912) and Λ*0b(5920).
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/11567/696002
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 110
  • ???jsp.display-item.citation.isi??? 97
social impact