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Observation of a New Excited Beauty Strange Baryon Decaying to Ξb- π+π-

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dc.contributor.authorSirunyan, A. M.
dc.contributor.authorTumasyan, A.
dc.contributor.authorAdam, W.
dc.contributor.authorAndrejkovic, J. W.
dc.contributor.authorMatveev, V.
dc.contributor.authorChistov, R.
dc.contributor.authorDanilov, M.
dc.contributor.authorOskin, A.
dc.contributor.authorParygin, P.
dc.contributor.authorPolikarpov, S.
dc.contributor.authorМатвеев, Виктор Анатольевич
dc.contributor.authorЧистов, Руслан Николаевич
dc.contributor.authorДанилов, Михаил Владимирович
dc.contributor.authorПоликарпов, Сергей Михайлович
dc.date.accessioned2024-11-29T17:12:27Z
dc.date.available2024-11-29T17:12:27Z
dc.date.issued2021
dc.description.abstract© 2021 CERN.The Ξb-π+π- invariant mass spectrum is investigated with an event sample of proton-proton collisions at s=13 TeV, collected by the CMS experiment at the LHC in 2016-2018 and corresponding to an integrated luminosity of 140 fb-1. The ground state Ξb- is reconstructed via its decays to J/ψΞ- and J/ψΛK-. A narrow resonance, labeled Ξb(6100)-, is observed at a Ξb-π+π- invariant mass of 6100.3±0.2(stat)±0.1(syst)±0.6(Ξb-) MeV, where the last uncertainty reflects the precision of the Ξb- baryon mass. The upper limit on the Ξb(6100)- natural width is determined to be 1.9 MeV at 95% confidence level. The low Ξb(6100)- signal yield observed in data does not allow a measurement of the quantum numbers of the new state. However, following analogies with the established excited Ξc baryon states, the new Ξb(6100)- resonance and its decay sequence are consistent with the orbitally excited Ξb- baryon, with spin and parity quantum numbers JP=3/2-.
dc.identifier.citationObservation of a New Excited Beauty Strange Baryon Decaying to Ξb- π+π- / Sirunyan, A.M. [et al.] // Physical Review Letters. - 2021. - 126. - № 25. - 10.1103/PhysRevLett.126.252003
dc.identifier.doi10.1103/PhysRevLett.126.252003
dc.identifier.urihttps://www.doi.org/10.1103/PhysRevLett.126.252003
dc.identifier.urihttps://www.scopus.com/record/display.uri?eid=2-s2.0-85108915377&origin=resultslist
dc.identifier.urihttp://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000669051600004
dc.identifier.urihttps://openrepository.mephi.ru/handle/123456789/24312
dc.relation.ispartofPhysical Review Letters
dc.titleObservation of a New Excited Beauty Strange Baryon Decaying to Ξb- π+π-
dc.typeArticle
dspace.entity.typePublication
oaire.citation.issue25
oaire.citation.volume126
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