Observation of Excited Λ0b Baryons

Calvo Gómez, Míriam; Camboni, Alessandro; Vilasís Cardona, Xavier; LHCb Collaboration - CERN

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Author

Calvo Gómez, Míriam

Camboni, Alessandro

Vilasís Cardona, Xavier

LHCb Collaboration - CERN

Other authors

Universitat Ramon Llull. La Salle

CERN

Publication date

2012-10-26

URI http://hdl.handle.net/20.500.14342/3293

DOI

https://doi.org/10.1103/PhysRevLett.109.172003

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).

Document Type

Article

Published version

Language

English

Keywords

Gran col·lisionador d'hadrons (França i Suïssa)

Partícules (Física nuclear)

Col·lisions (Física nuclear)

Pages

8 p.

Publisher

American Physical Society

Is part of

Physical Review Letters, 2012, Vol. 109, No. 7 (Octubre)

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Except where otherwise noted, this item's license is described as http://creativecommons.org/licenses/by/4.0/