Why Xi(1690) and Xi(2120) are so narrow

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dc.citation.issue3
dc.citation.volume97
dc.contributor.authorKhemchandani, K. P. [UNIFESP]
dc.contributor.authorMartinez Torres, A.
dc.contributor.authorHosaka, A.
dc.contributor.authorNagahiro, H.
dc.contributor.authorNavarra, F. S.
dc.contributor.authorNielsen, M.
dc.coverageCollege Pk
dc.date.accessioned2020-07-08T13:09:41Z
dc.date.available2020-07-08T13:09:41Z
dc.date.issued2018
dc.description.abstractThe Xi baryons are expected to be naturally narrower as compared to their nonstrange and strange counterparts since they have only one light quark and, thus, their decay involves producing either a light meson and doubly strange baryon or both meson and baryon with strangeness which involves, relatively, more energy. In fact, some Xi's have full widths of the order of even 10-20 MeV when, in principle, they have a large phase space to decay to some open channels. Such is the case of Xi(1690), for which the width has been found to be of the order of 10 MeV in the latest BABAR and BELLE data. In this manuscript we study why some Xi's are so narrow. Based on a coupled channel calculation of the pseudoscalar meson-baryon and vector meson-baryon systems with chiral and hidden local symmetry Lagrangians, we find that the answer lies in the intricate hadron dynamics. We find that the known mass, width, spin-parity, and branching ratios of Xi(1690) can be naturally explained in terms of coupled channel meson-baryon dynamics. We find another narrow resonance which can be related to Xi(2120). We also look for exotic states Xi(+) and Xi(--) but find none. In addition we provide the cross sections for (K) over bar Lambda (K) over bar Sigma -> pi Xi which can be useful for understanding the enhanced yield of Xi reported in recent studies of heavy ion collisions.en
dc.description.affiliationUniv Fed Sao Paulo, Dept Ciencias Exatas & Terra, Campus Diadema,Rua Prof Artur Riedel 275, BR-09972270 Sao Paulo, Brazil
dc.description.affiliationUniv Estado Rio de Janeiro, Fac Tecnol, Rodovia Presidente Dutra Km 298, BR-27537000 Rio De Janeiro, Brazil
dc.description.affiliationUniv Sao Paulo, Inst Fis, CP 66318, BR-05314970 Sao Paulo, SP, Brazil
dc.description.affiliationRes Ctr Nucl Phys RCNP, Mihogaoka 10-1, Ibaraki 5670047, Japan
dc.description.affiliationNara Womens Univ, Dept Phys, Nara 6308506, Japan
dc.description.affiliationUnifespUniv Fed Sao Paulo, Dept Ciencias Exatas & Terra, Campus Diadema,Rua Prof Artur Riedel 275, BR-09972270 Sao Paulo, Brazil
dc.description.sourceWeb of Science
dc.description.sponsorshipFAPESP [2012/50984-4]
dc.description.sponsorshipCNPq [310759/2016-1, 311524/2016-8]
dc.description.sponsorship[JP17K05441(C)]
dc.description.sponsorship[JP17K05443(C)]
dc.description.sponsorshipIDFAPESP: 2012/50984-4
dc.description.sponsorshipIDCNPq: 310759/2016-1, 311524/2016-8
dc.description.sponsorshipIDJP17K05441(C)
dc.description.sponsorshipIDJP17K05443(C)
dc.format.extent-
dc.identifierhttp://dx.doi.org/10.1103/PhysRevD.97.034005
dc.identifier.citationPhysical Review D. College Pk, v. 97, n. 3, p. -, 2018.
dc.identifier.doi10.1103/PhysRevD.97.034005
dc.identifier.issn2470-0010
dc.identifier.urihttps://repositorio.unifesp.br/handle/11600/54136
dc.identifier.wosWOS:000424379700003
dc.language.isoeng
dc.publisherAmer Physical Soc
dc.relation.ispartofPhysical Review D
dc.rightsAcesso restrito
dc.titleWhy Xi(1690) and Xi(2120) are so narrowen
dc.typeArtigo
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