Masses of magnetized pseudoscalar and vector mesons in an extended NJL model: The role of axial vector mesons

We study the mass spectrum of light pseudoscalar and vector mesons in the presence of an external uniform magnetic field B→, considering the effects of the mixing with the axial-vector meson sector. The analysis is performed within a two-flavor NJL-like model which includes isoscalar and isovector c...

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Detalles Bibliográficos
Autores: Coppola, M., Gómez Dumm, D., Noguera, Santiago, Scoccola, N.N.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2024
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/364876
Acceso en línea:http://hdl.handle.net/10261/364876
Access Level:acceso abierto
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spelling Masses of magnetized pseudoscalar and vector mesons in an extended NJL model: The role of axial vector mesonsCoppola, M.Gómez Dumm, D.Noguera, SantiagoScoccola, N.N.We study the mass spectrum of light pseudoscalar and vector mesons in the presence of an external uniform magnetic field B→, considering the effects of the mixing with the axial-vector meson sector. The analysis is performed within a two-flavor NJL-like model which includes isoscalar and isovector couplings together with a flavor mixing 't Hooft-like term. The effect of the magnetic field on charged particles is taken into account by retaining the Schwinger phases carried by quark propagators, and expanding the corresponding meson fields in proper Ritus-like bases. The spin-isospin and spin-flavor decomposition of meson mass states is also analyzed. For neutral pion masses it is shown that the mixing with axial vector mesons improves previous theoretical results, leading to a monotonic decreasing behavior with B that is in good qualitative agreement with lattice QCD (LQCD) calculations, both for the case of constant or B-dependent couplings. Regarding charged pions, it is seen that the mixing softens the enhancement of their mass with B. As a consequence, the energy becomes lower than the one corresponding to a pointlike pion, improving the agreement with LQCD results. The agreement is also improved for the magnetic behavior of the lowest ρ+ energy state, which does not vanish for the considered range of values of B - a fact that can be relevant in connection with the occurrence of meson condensation for strong magnetic fields.American Physical SocietyEuropean CommissionMinisterio de Ciencia e Innovación (España)Generalitat ValencianaAgencia Estatal de Investigación (España)SCOAPConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2024202420242024info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/364876reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE##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/PID2019-105439GB-C21info:eu-repo/grantAgreement/EC/H2020/824093info:eu-repo/grantAgreement/GVA//PROMETEOhttp://dx.doi.org/10.1103/PhysRevD.109.054014Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3648762026-05-22T06:33:51Z
dc.title.none.fl_str_mv Masses of magnetized pseudoscalar and vector mesons in an extended NJL model: The role of axial vector mesons
title Masses of magnetized pseudoscalar and vector mesons in an extended NJL model: The role of axial vector mesons
spellingShingle Masses of magnetized pseudoscalar and vector mesons in an extended NJL model: The role of axial vector mesons
Coppola, M.
title_short Masses of magnetized pseudoscalar and vector mesons in an extended NJL model: The role of axial vector mesons
title_full Masses of magnetized pseudoscalar and vector mesons in an extended NJL model: The role of axial vector mesons
title_fullStr Masses of magnetized pseudoscalar and vector mesons in an extended NJL model: The role of axial vector mesons
title_full_unstemmed Masses of magnetized pseudoscalar and vector mesons in an extended NJL model: The role of axial vector mesons
title_sort Masses of magnetized pseudoscalar and vector mesons in an extended NJL model: The role of axial vector mesons
dc.creator.none.fl_str_mv Coppola, M.
Gómez Dumm, D.
Noguera, Santiago
Scoccola, N.N.
author Coppola, M.
author_facet Coppola, M.
Gómez Dumm, D.
Noguera, Santiago
Scoccola, N.N.
author_role author
author2 Gómez Dumm, D.
Noguera, Santiago
Scoccola, N.N.
author2_role author
author
author
dc.contributor.none.fl_str_mv European Commission
Ministerio de Ciencia e Innovación (España)
Generalitat Valenciana
Agencia Estatal de Investigación (España)
SCOAP
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
description We study the mass spectrum of light pseudoscalar and vector mesons in the presence of an external uniform magnetic field B→, considering the effects of the mixing with the axial-vector meson sector. The analysis is performed within a two-flavor NJL-like model which includes isoscalar and isovector couplings together with a flavor mixing 't Hooft-like term. The effect of the magnetic field on charged particles is taken into account by retaining the Schwinger phases carried by quark propagators, and expanding the corresponding meson fields in proper Ritus-like bases. The spin-isospin and spin-flavor decomposition of meson mass states is also analyzed. For neutral pion masses it is shown that the mixing with axial vector mesons improves previous theoretical results, leading to a monotonic decreasing behavior with B that is in good qualitative agreement with lattice QCD (LQCD) calculations, both for the case of constant or B-dependent couplings. Regarding charged pions, it is seen that the mixing softens the enhancement of their mass with B. As a consequence, the energy becomes lower than the one corresponding to a pointlike pion, improving the agreement with LQCD results. The agreement is also improved for the magnetic behavior of the lowest ρ+ energy state, which does not vanish for the considered range of values of B - a fact that can be relevant in connection with the occurrence of meson condensation for strong magnetic fields.
publishDate 2024
dc.date.none.fl_str_mv 2024
2024
2024
2024
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/10261/364876
url http://hdl.handle.net/10261/364876
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#
#PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2019-105439GB-C21
info:eu-repo/grantAgreement/EC/H2020/824093
info:eu-repo/grantAgreement/GVA//PROMETEO
http://dx.doi.org/10.1103/PhysRevD.109.054014
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
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