Pseudoscalar mesons with symmetric bound state vertex functions on the light front
Autor(a) principal: | |
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Data de Publicação: | 2015 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1103/PhysRevD.92.034017 http://hdl.handle.net/11449/160720 |
Resumo: | We study the electromagnetic form factors, decay constants and charge radii of the pion and kaon within the framework of light-front field theory formalism where we use an ansatz for the quark-meson interaction bound-state function which is symmetric under exchange of quark and antiquark momentum. The above-mentioned observables are evaluated for the + component of the electromagnetic current, J(+), in the Breit frame. We also check the invariance of these observables in other frames, whereby both the valance and the nonvalence contributions have to be taken into account, and study the sensitivity of the electromagnetic form factors and charge radius to the model's parameters; namely, the quark masses, m(u) = m((d) over bar), m((s) over bar), and the regulator mass, m(R). It is found that after a fine-tuning of the regulator mass, i.e. m(R) = 0.6 GeV, the model is suitable to fit the available experimental data within the theoretical uncertainties of both the pion and kaon. |
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Repositório Institucional da UNESP |
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spelling |
Pseudoscalar mesons with symmetric bound state vertex functions on the light frontWe study the electromagnetic form factors, decay constants and charge radii of the pion and kaon within the framework of light-front field theory formalism where we use an ansatz for the quark-meson interaction bound-state function which is symmetric under exchange of quark and antiquark momentum. The above-mentioned observables are evaluated for the + component of the electromagnetic current, J(+), in the Breit frame. We also check the invariance of these observables in other frames, whereby both the valance and the nonvalence contributions have to be taken into account, and study the sensitivity of the electromagnetic form factors and charge radius to the model's parameters; namely, the quark masses, m(u) = m((d) over bar), m((s) over bar), and the regulator mass, m(R). It is found that after a fine-tuning of the regulator mass, i.e. m(R) = 0.6 GeV, the model is suitable to fit the available experimental data within the theoretical uncertainties of both the pion and kaon.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Univ Cruzeiro Sul, Lab Fis Teor & Computac, BR-01506000 Sao Paulo, SP, BrazilNatl Ctr Phys, Islamabad 45320, PakistanNatl Univ Sci & Technol, Sch Nat Sci, Dept Phys, Islamabad 44000, PakistanUniv Estadual Paulista, Inst Fis Teor, BR-01140070 Sao Paulo, SP, BrazilUniv Estadual Paulista, Inst Fis Teor, BR-01140070 Sao Paulo, SP, BrazilAmer Physical SocUniv Cruzeiro SulNatl Ctr PhysNatl Univ Sci & TechnolUniversidade Estadual Paulista (Unesp)Yabusaki, George H. S.Ahmed, IshtiaqParacha, M. AliMelo, J. P. B. C. deEl-Bennich, Bruno [UNESP]2018-11-26T16:16:26Z2018-11-26T16:16:26Z2015-08-18info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article8application/pdfhttp://dx.doi.org/10.1103/PhysRevD.92.034017Physical Review D. College Pk: Amer Physical Soc, v. 92, n. 3, 8 p., 2015.1550-7998http://hdl.handle.net/11449/16072010.1103/PhysRevD.92.034017WOS:000359865700003WOS000359865700003.pdfWeb of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengPhysical Review Dinfo:eu-repo/semantics/openAccess2023-11-21T06:16:24Zoai:repositorio.unesp.br:11449/160720Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T18:23:08.163114Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Pseudoscalar mesons with symmetric bound state vertex functions on the light front |
title |
Pseudoscalar mesons with symmetric bound state vertex functions on the light front |
spellingShingle |
Pseudoscalar mesons with symmetric bound state vertex functions on the light front Yabusaki, George H. S. |
title_short |
Pseudoscalar mesons with symmetric bound state vertex functions on the light front |
title_full |
Pseudoscalar mesons with symmetric bound state vertex functions on the light front |
title_fullStr |
Pseudoscalar mesons with symmetric bound state vertex functions on the light front |
title_full_unstemmed |
Pseudoscalar mesons with symmetric bound state vertex functions on the light front |
title_sort |
Pseudoscalar mesons with symmetric bound state vertex functions on the light front |
author |
Yabusaki, George H. S. |
author_facet |
Yabusaki, George H. S. Ahmed, Ishtiaq Paracha, M. Ali Melo, J. P. B. C. de El-Bennich, Bruno [UNESP] |
author_role |
author |
author2 |
Ahmed, Ishtiaq Paracha, M. Ali Melo, J. P. B. C. de El-Bennich, Bruno [UNESP] |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
Univ Cruzeiro Sul Natl Ctr Phys Natl Univ Sci & Technol Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Yabusaki, George H. S. Ahmed, Ishtiaq Paracha, M. Ali Melo, J. P. B. C. de El-Bennich, Bruno [UNESP] |
description |
We study the electromagnetic form factors, decay constants and charge radii of the pion and kaon within the framework of light-front field theory formalism where we use an ansatz for the quark-meson interaction bound-state function which is symmetric under exchange of quark and antiquark momentum. The above-mentioned observables are evaluated for the + component of the electromagnetic current, J(+), in the Breit frame. We also check the invariance of these observables in other frames, whereby both the valance and the nonvalence contributions have to be taken into account, and study the sensitivity of the electromagnetic form factors and charge radius to the model's parameters; namely, the quark masses, m(u) = m((d) over bar), m((s) over bar), and the regulator mass, m(R). It is found that after a fine-tuning of the regulator mass, i.e. m(R) = 0.6 GeV, the model is suitable to fit the available experimental data within the theoretical uncertainties of both the pion and kaon. |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015-08-18 2018-11-26T16:16:26Z 2018-11-26T16:16:26Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1103/PhysRevD.92.034017 Physical Review D. College Pk: Amer Physical Soc, v. 92, n. 3, 8 p., 2015. 1550-7998 http://hdl.handle.net/11449/160720 10.1103/PhysRevD.92.034017 WOS:000359865700003 WOS000359865700003.pdf |
url |
http://dx.doi.org/10.1103/PhysRevD.92.034017 http://hdl.handle.net/11449/160720 |
identifier_str_mv |
Physical Review D. College Pk: Amer Physical Soc, v. 92, n. 3, 8 p., 2015. 1550-7998 10.1103/PhysRevD.92.034017 WOS:000359865700003 WOS000359865700003.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Physical Review D |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
8 application/pdf |
dc.publisher.none.fl_str_mv |
Amer Physical Soc |
publisher.none.fl_str_mv |
Amer Physical Soc |
dc.source.none.fl_str_mv |
Web of Science reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1808128925433331712 |