Nature of the lowest-lying odd parity charmed baryon Λc (2595) and Λc (2625) resonances

We study the structure of the Λc(2595) and Λc(2625) resonances in the framework of an effective field theory consistent with heavy quark spin and chiral symmetries, which incorporates the interplay between ςc(∗)π-ND(∗) baryon-meson degrees of freedom (d.o.f.) and bare P-wave cūd quark-model states....

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Detalles Bibliográficos
Autores: Nieves, Juan Miguel, Pavao, R.P.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2020
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:dnet:digitalcsic_::2269ee0607ebf7404756c8becf1abc6e
Acceso en línea:http://hdl.handle.net/10261/216056
Access Level:acceso abierto
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spelling Nature of the lowest-lying odd parity charmed baryon Λc (2595) and Λc (2625) resonancesNature of the lowest-lying odd parity charmed baryon Lambda(c)(2595) and Lambda(c)(2625) resonancesNieves, Juan MiguelPavao, R.P.We study the structure of the Λc(2595) and Λc(2625) resonances in the framework of an effective field theory consistent with heavy quark spin and chiral symmetries, which incorporates the interplay between ςc(∗)π-ND(∗) baryon-meson degrees of freedom (d.o.f.) and bare P-wave cūd quark-model states. We show that these two resonances are not heavy quark spin symmetry partners. The JP=3/2- Λc(2625) should be viewed mostly as a dressed three-quark state, whose origin is determined by a bare state, predicted to lie very close to the mass of the resonance. The JP=1/2- Λc(2595) seems to have, however, a predominant molecular structure. This is because it is either the result of the chiral ςcπ interaction, whose threshold is located much closer than the mass of the bare three-quark state, or because the light d.o.f. in its inner structure are coupled to the unnatural 0- quantum numbers. We show that both situations can occur depending on the renormalization procedure used. We find some additional states, but the classification of the spectrum in terms of heavy quark spin symmetry is difficult, despite having used interactions that respect this symmetry. This is because the bare quark-model state and the ςcπ threshold are located extraordinarily close to the Λc(2625) and Λc(2595), respectively, and hence they play totally different roles in each sector.American Physical SocietyMinisterio de Economía y Competitividad (España)Ministerio de Ciencia e Innovación (España)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2020202020202020info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/216056reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/FIS2017-84038-C2-1-Pinfo:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/SEV-2014-0398http://dx.doi.org/10.1103/PhysRevD.101.014018Síinfo:eu-repo/semantics/openAccessoai:dnet:digitalcsic_::2269ee0607ebf7404756c8becf1abc6e2026-05-22T06:33:51Z
dc.title.none.fl_str_mv Nature of the lowest-lying odd parity charmed baryon Λc (2595) and Λc (2625) resonances
Nature of the lowest-lying odd parity charmed baryon Lambda(c)(2595) and Lambda(c)(2625) resonances
title Nature of the lowest-lying odd parity charmed baryon Λc (2595) and Λc (2625) resonances
spellingShingle Nature of the lowest-lying odd parity charmed baryon Λc (2595) and Λc (2625) resonances
Nieves, Juan Miguel
title_short Nature of the lowest-lying odd parity charmed baryon Λc (2595) and Λc (2625) resonances
title_full Nature of the lowest-lying odd parity charmed baryon Λc (2595) and Λc (2625) resonances
title_fullStr Nature of the lowest-lying odd parity charmed baryon Λc (2595) and Λc (2625) resonances
title_full_unstemmed Nature of the lowest-lying odd parity charmed baryon Λc (2595) and Λc (2625) resonances
title_sort Nature of the lowest-lying odd parity charmed baryon Λc (2595) and Λc (2625) resonances
dc.creator.none.fl_str_mv Nieves, Juan Miguel
Pavao, R.P.
author Nieves, Juan Miguel
author_facet Nieves, Juan Miguel
Pavao, R.P.
author_role author
author2 Pavao, R.P.
author2_role author
dc.contributor.none.fl_str_mv Ministerio de Economía y Competitividad (España)
Ministerio de Ciencia e Innovación (España)
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
description We study the structure of the Λc(2595) and Λc(2625) resonances in the framework of an effective field theory consistent with heavy quark spin and chiral symmetries, which incorporates the interplay between ςc(∗)π-ND(∗) baryon-meson degrees of freedom (d.o.f.) and bare P-wave cūd quark-model states. We show that these two resonances are not heavy quark spin symmetry partners. The JP=3/2- Λc(2625) should be viewed mostly as a dressed three-quark state, whose origin is determined by a bare state, predicted to lie very close to the mass of the resonance. The JP=1/2- Λc(2595) seems to have, however, a predominant molecular structure. This is because it is either the result of the chiral ςcπ interaction, whose threshold is located much closer than the mass of the bare three-quark state, or because the light d.o.f. in its inner structure are coupled to the unnatural 0- quantum numbers. We show that both situations can occur depending on the renormalization procedure used. We find some additional states, but the classification of the spectrum in terms of heavy quark spin symmetry is difficult, despite having used interactions that respect this symmetry. This is because the bare quark-model state and the ςcπ threshold are located extraordinarily close to the Λc(2625) and Λc(2595), respectively, and hence they play totally different roles in each sector.
publishDate 2020
dc.date.none.fl_str_mv 2020
2020
2020
2020
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/216056
url http://hdl.handle.net/10261/216056
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
#PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/FIS2017-84038-C2-1-P
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/SEV-2014-0398
http://dx.doi.org/10.1103/PhysRevD.101.014018
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv American Physical Society
publisher.none.fl_str_mv American Physical Society
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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