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Observation of excited Λ(b)(0) baryons.

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 Λ(b)(0)π(+)π(-) spectrum with masses 5911.97±0.12(stat)±0.02(syst)±0.66(Λ(b)(0) mass) MeV/c(2) and 5919.77±0.08(stat)±0.02(syst)±0.66(Λ(b)(0) mass) MeV/c(2). The significances of the observations are 5.2 and 10.2 standard deviations, respectively. These states are interpreted as the orbitally excited Λ(b)(0) baryons, Λ(b)(*0)(5912) and Λ(b)(*0)(5920).
Publication status:
Published

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Journal:
Physical review letters
Volume:
109
Issue:
17
Pages:
172003
Publication date:
2012-10-26
DOI:
EISSN:
1079-7114
ISSN:
0031-9007
URN:
uuid:02b7f122-a394-49f6-836d-61bb705ecda4
Source identifiers:
359686
Local pid:
pubs:359686
Language:
English
Keywords:

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