Partial restoration of chiral symmetry in cold nuclear matter: the phi-meson case
Autor(a) principal: | |
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Data de Publicação: | 2017 |
Outros Autores: | , , , |
Tipo de documento: | Artigo de conferência |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1088/1742-6596/912/1/012009 http://hdl.handle.net/11449/163531 |
Resumo: | The work presented at this workshop is divided into two parts. In the first part, the mass and decay width of the phi-meson in cold nuclear matter are computed in an effective Lagrangian approach. The medium dependence of these properties are obtained by evaluating kaon-antikaon loop contributions to the phi-meson self-energy, employing medium-modified kaon masses calculated using the quark-meson coupling model. The loop integral is regularized with a dipole form factor, and the sensitivity of the results to the choice of cutoff mass in the form factor is investigated. At normal nuclear matter density, we find a downward shift of the phi mass by a few percent, while the decay width is enhanced by an order of magnitude. Our results support the literature which suggest that one should observe a small downward mass shift and a large broadening of the decay width. In the second part, we present phi-meson-nucleus bound state energies and absorption widths for four selected nuclei, calculated by solving the Klein-Gordon equation with complex optical potentials. The attractive potential for the phi-meson in the nuclear medium originates from the in-medium enhanced K (K) over bar loop in the phi-meson self-energy. The results suggest that the phi-meson should form bound states with all the nuclei considered. However, the identification of the signal for these predicted bound states will need careful investigation because of their sizable absorption widths. |
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Partial restoration of chiral symmetry in cold nuclear matter: the phi-meson caseThe work presented at this workshop is divided into two parts. In the first part, the mass and decay width of the phi-meson in cold nuclear matter are computed in an effective Lagrangian approach. The medium dependence of these properties are obtained by evaluating kaon-antikaon loop contributions to the phi-meson self-energy, employing medium-modified kaon masses calculated using the quark-meson coupling model. The loop integral is regularized with a dipole form factor, and the sensitivity of the results to the choice of cutoff mass in the form factor is investigated. At normal nuclear matter density, we find a downward shift of the phi mass by a few percent, while the decay width is enhanced by an order of magnitude. Our results support the literature which suggest that one should observe a small downward mass shift and a large broadening of the decay width. In the second part, we present phi-meson-nucleus bound state energies and absorption widths for four selected nuclei, calculated by solving the Klein-Gordon equation with complex optical potentials. The attractive potential for the phi-meson in the nuclear medium originates from the in-medium enhanced K (K) over bar loop in the phi-meson self-energy. The results suggest that the phi-meson should form bound states with all the nuclei considered. However, the identification of the signal for these predicted bound states will need careful investigation because of their sizable absorption widths.Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)University of AdelaideAustralian Research Council through the ARC Centre of Excellence for Particle Physics at the TerascaleAustralian Research CouncilRed-FAE-CONACyT (Mexico)Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Catedra CONACyT, Apartado Postal 14-740, Mexico City 07000, DF, MexicoUniv Cruzeiro Sul, LFTC, BR-01506000 Sao Paulo, SP, BrazilUniv Estadual Paulista, Inst Fis Teor, Rua Dr Bento Teobaldo Ferraz,271-Bloco II, BR-01140070 Sao Paulo, SP, BrazilUniv Adelaide, ARC Ctr Excellence Particle Phys Terascale, Adelaide, SA 5005, AustraliaUniv Adelaide, CSSM, Dept Phys, Adelaide, SA 5005, AustraliaUniv Estadual Paulista, Inst Fis Teor, Rua Dr Bento Teobaldo Ferraz,271-Bloco II, BR-01140070 Sao Paulo, SP, BrazilCNPq: 152348/2016-6CNPq: 400826/2014-3CNPq: 308088/2015-8CNPq: 305894/2009-9CNPq: 313800/2014-6FAPESP: 2015/17234-0FAPESP: 2013/01907-0Australian Research Council through the ARC Centre of Excellence for Particle Physics at the Terascale: CE110001104Australian Research Council: DP151103101Iop Publishing LtdInst Politecn NaclUniv Cruzeiro SulUniversidade Estadual Paulista (Unesp)Univ AdelaideCobos-Martinez, J. J.Tsushima, K.Krein, G. [UNESP]Thomas, A. W.IOP2018-11-26T17:42:24Z2018-11-26T17:42:24Z2017-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObject10application/pdfhttp://dx.doi.org/10.1088/1742-6596/912/1/01200931st Annual Meeting Of The Division Of Particles And Fields (dpyc) Of The Mexican Physical Society. Bristol: Iop Publishing Ltd, v. 912, 10 p., 2017.1742-6588http://hdl.handle.net/11449/16353110.1088/1742-6596/912/1/012009WOS:000416372100009WOS000416372100009.pdfWeb of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPeng31st Annual Meeting Of The Division Of Particles And Fields (dpyc) Of The Mexican Physical Society0,241info:eu-repo/semantics/openAccess2024-01-17T06:28:09Zoai:repositorio.unesp.br:11449/163531Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-01-17T06:28:09Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Partial restoration of chiral symmetry in cold nuclear matter: the phi-meson case |
title |
Partial restoration of chiral symmetry in cold nuclear matter: the phi-meson case |
spellingShingle |
Partial restoration of chiral symmetry in cold nuclear matter: the phi-meson case Cobos-Martinez, J. J. |
title_short |
Partial restoration of chiral symmetry in cold nuclear matter: the phi-meson case |
title_full |
Partial restoration of chiral symmetry in cold nuclear matter: the phi-meson case |
title_fullStr |
Partial restoration of chiral symmetry in cold nuclear matter: the phi-meson case |
title_full_unstemmed |
Partial restoration of chiral symmetry in cold nuclear matter: the phi-meson case |
title_sort |
Partial restoration of chiral symmetry in cold nuclear matter: the phi-meson case |
author |
Cobos-Martinez, J. J. |
author_facet |
Cobos-Martinez, J. J. Tsushima, K. Krein, G. [UNESP] Thomas, A. W. IOP |
author_role |
author |
author2 |
Tsushima, K. Krein, G. [UNESP] Thomas, A. W. IOP |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
Inst Politecn Nacl Univ Cruzeiro Sul Universidade Estadual Paulista (Unesp) Univ Adelaide |
dc.contributor.author.fl_str_mv |
Cobos-Martinez, J. J. Tsushima, K. Krein, G. [UNESP] Thomas, A. W. IOP |
description |
The work presented at this workshop is divided into two parts. In the first part, the mass and decay width of the phi-meson in cold nuclear matter are computed in an effective Lagrangian approach. The medium dependence of these properties are obtained by evaluating kaon-antikaon loop contributions to the phi-meson self-energy, employing medium-modified kaon masses calculated using the quark-meson coupling model. The loop integral is regularized with a dipole form factor, and the sensitivity of the results to the choice of cutoff mass in the form factor is investigated. At normal nuclear matter density, we find a downward shift of the phi mass by a few percent, while the decay width is enhanced by an order of magnitude. Our results support the literature which suggest that one should observe a small downward mass shift and a large broadening of the decay width. In the second part, we present phi-meson-nucleus bound state energies and absorption widths for four selected nuclei, calculated by solving the Klein-Gordon equation with complex optical potentials. The attractive potential for the phi-meson in the nuclear medium originates from the in-medium enhanced K (K) over bar loop in the phi-meson self-energy. The results suggest that the phi-meson should form bound states with all the nuclei considered. However, the identification of the signal for these predicted bound states will need careful investigation because of their sizable absorption widths. |
publishDate |
2017 |
dc.date.none.fl_str_mv |
2017-01-01 2018-11-26T17:42:24Z 2018-11-26T17:42:24Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/conferenceObject |
format |
conferenceObject |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1088/1742-6596/912/1/012009 31st Annual Meeting Of The Division Of Particles And Fields (dpyc) Of The Mexican Physical Society. Bristol: Iop Publishing Ltd, v. 912, 10 p., 2017. 1742-6588 http://hdl.handle.net/11449/163531 10.1088/1742-6596/912/1/012009 WOS:000416372100009 WOS000416372100009.pdf |
url |
http://dx.doi.org/10.1088/1742-6596/912/1/012009 http://hdl.handle.net/11449/163531 |
identifier_str_mv |
31st Annual Meeting Of The Division Of Particles And Fields (dpyc) Of The Mexican Physical Society. Bristol: Iop Publishing Ltd, v. 912, 10 p., 2017. 1742-6588 10.1088/1742-6596/912/1/012009 WOS:000416372100009 WOS000416372100009.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
31st Annual Meeting Of The Division Of Particles And Fields (dpyc) Of The Mexican Physical Society 0,241 |
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info:eu-repo/semantics/openAccess |
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openAccess |
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10 application/pdf |
dc.publisher.none.fl_str_mv |
Iop Publishing Ltd |
publisher.none.fl_str_mv |
Iop Publishing Ltd |
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Web of Science reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
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Universidade Estadual Paulista (UNESP) |
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UNESP |
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Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
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