Spin-1 particle in the light-front approach
Autor(a) principal: | |
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Data de Publicação: | 2004 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1590/S0103-97332004000500047 http://hdl.handle.net/11449/29743 |
Resumo: | The electromagnetic current of spin-1 composite particles does not transform properly under rotations if only the valence contribution is considered in the light-front model. In particular, the plus component of the current, evaluated only for the valence component of the wave function, in the Drell-Yan frame violates rotational symmetry, which does not allow a unique calculation of the electromagnetic form-factors. The prescription suggested by Grach and Kondratyuk [Sov. J. Nucl. Phys. 38, 198 (1984)] to extract the form factors from the plus component of the current, eliminates contributions from pair diagrams or zero modes, which if not evaluated properly cause the violation of the rotational symmetry. We address this problem in an analytical and covariant model of a spin-1 composite particle. |
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Spin-1 particle in the light-front approachThe electromagnetic current of spin-1 composite particles does not transform properly under rotations if only the valence contribution is considered in the light-front model. In particular, the plus component of the current, evaluated only for the valence component of the wave function, in the Drell-Yan frame violates rotational symmetry, which does not allow a unique calculation of the electromagnetic form-factors. The prescription suggested by Grach and Kondratyuk [Sov. J. Nucl. Phys. 38, 198 (1984)] to extract the form factors from the plus component of the current, eliminates contributions from pair diagrams or zero modes, which if not evaluated properly cause the violation of the rotational symmetry. We address this problem in an analytical and covariant model of a spin-1 composite particle.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Universidade Estadual Paulista Instituto de Física TeóricaCentro Técnico Aeroespacial Instituto Tecnológico de Aeronáutica Departamento de FísicaUniversidade Estadual Paulista Instituto de Física TeóricaSociedade Brasileira de FísicaUniversidade Estadual Paulista (Unesp)Centro Técnico Aeroespacial Instituto Tecnológico de Aeronáutica Departamento de FísicaMelo, J. P. B. C. de [UNESP]Frederico, T.2014-05-20T15:15:41Z2014-05-20T15:15:41Z2004-09-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article881-884application/pdfhttp://dx.doi.org/10.1590/S0103-97332004000500047Brazilian Journal of Physics. Sociedade Brasileira de Física, v. 34, n. 3a, p. 881-884, 2004.0103-9733http://hdl.handle.net/11449/2974310.1590/S0103-97332004000500047S0103-97332004000500047S0103-97332004000500047.pdfSciELOreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengBrazilian Journal of Physics1.0820,276info:eu-repo/semantics/openAccess2023-11-26T06:11:17Zoai:repositorio.unesp.br:11449/29743Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462023-11-26T06:11:17Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Spin-1 particle in the light-front approach |
title |
Spin-1 particle in the light-front approach |
spellingShingle |
Spin-1 particle in the light-front approach Melo, J. P. B. C. de [UNESP] |
title_short |
Spin-1 particle in the light-front approach |
title_full |
Spin-1 particle in the light-front approach |
title_fullStr |
Spin-1 particle in the light-front approach |
title_full_unstemmed |
Spin-1 particle in the light-front approach |
title_sort |
Spin-1 particle in the light-front approach |
author |
Melo, J. P. B. C. de [UNESP] |
author_facet |
Melo, J. P. B. C. de [UNESP] Frederico, T. |
author_role |
author |
author2 |
Frederico, T. |
author2_role |
author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Centro Técnico Aeroespacial Instituto Tecnológico de Aeronáutica Departamento de Física |
dc.contributor.author.fl_str_mv |
Melo, J. P. B. C. de [UNESP] Frederico, T. |
description |
The electromagnetic current of spin-1 composite particles does not transform properly under rotations if only the valence contribution is considered in the light-front model. In particular, the plus component of the current, evaluated only for the valence component of the wave function, in the Drell-Yan frame violates rotational symmetry, which does not allow a unique calculation of the electromagnetic form-factors. The prescription suggested by Grach and Kondratyuk [Sov. J. Nucl. Phys. 38, 198 (1984)] to extract the form factors from the plus component of the current, eliminates contributions from pair diagrams or zero modes, which if not evaluated properly cause the violation of the rotational symmetry. We address this problem in an analytical and covariant model of a spin-1 composite particle. |
publishDate |
2004 |
dc.date.none.fl_str_mv |
2004-09-01 2014-05-20T15:15:41Z 2014-05-20T15:15:41Z |
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/10.1590/S0103-97332004000500047 Brazilian Journal of Physics. Sociedade Brasileira de Física, v. 34, n. 3a, p. 881-884, 2004. 0103-9733 http://hdl.handle.net/11449/29743 10.1590/S0103-97332004000500047 S0103-97332004000500047 S0103-97332004000500047.pdf |
url |
http://dx.doi.org/10.1590/S0103-97332004000500047 http://hdl.handle.net/11449/29743 |
identifier_str_mv |
Brazilian Journal of Physics. Sociedade Brasileira de Física, v. 34, n. 3a, p. 881-884, 2004. 0103-9733 10.1590/S0103-97332004000500047 S0103-97332004000500047 S0103-97332004000500047.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Brazilian Journal of Physics 1.082 0,276 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
881-884 application/pdf |
dc.publisher.none.fl_str_mv |
Sociedade Brasileira de Física |
publisher.none.fl_str_mv |
Sociedade Brasileira de Física |
dc.source.none.fl_str_mv |
SciELO 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_ |
1799965073627676672 |