Quantum loops in radiative decays of the a(1) and b(1) axial-vector mesons

10 pages, 4 figures.-- ISI Article Identifier: 000251895400004.-- ArXiv pre-print available at: http://arxiv.org/abs/hep-ph/0611075

Detalhes bibliográficos
Autores: Roca, Luis, Hosaka, A., Oset, Eulogi
Tipo de documento: artigo
Data de publicação:2007
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositório:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/9123
Acesso em linha:http://hdl.handle.net/10261/9123
Access Level:Acceso aberto
Palavra-chave:Chiral perturbation theory
Unitary approach
Scalar mesons
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spelling Quantum loops in radiative decays of the a(1) and b(1) axial-vector mesonsRoca, LuisHosaka, A.Oset, EulogiChiral perturbation theoryUnitary approachScalar mesons10 pages, 4 figures.-- ISI Article Identifier: 000251895400004.-- ArXiv pre-print available at: http://arxiv.org/abs/hep-ph/0611075Printed version published on Dec 13, 2007.A previous model where the low-lying axial-vector mesons are dynamically generated, implementing unitarity in coupled channels in the vector-pseudoscalar (VP) meson interaction, is applied to evaluate the decay widths of the a(1)(1260) and b(1)(1235) axial-vector mesons into πγ. Unlike the case of the a(1), the b(1) radiative decay is systematically underestimated at tree level. In this work we evaluate for the first time the loop contribution coming from an initial VP vertex. Despite the large superficial divergence of the loops, the convergence of the relevant loops can be established by using arguments of gauge invariance. The partial decay widths obtained agree with the experimental values within uncertainties, and we show that the loop contribution is crucial in the b(1) case and also important for the a(1) case.This work is partly supported by DGICYT contract number FIS2006-03438, the Generalitat Valenciana and the JSPS–CSIC Collaboration agreement No. 2005JP0002. This research is part of the EU Integrated Infrastructure Initiative Hadron Physics Project under contract number RII3-CT-2004-506078.Peer reviewedElsevier200820082007info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_65012373 bytestext/plainhttp://hdl.handle.net/10261/9123reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://dx.doi.org/10.1016/j.physletb.2007.10.035info:eu-repo/semantics/openAccessoai:digital.csic.es:10261/91232026-05-22T06:33:51Z
dc.title.none.fl_str_mv Quantum loops in radiative decays of the a(1) and b(1) axial-vector mesons
title Quantum loops in radiative decays of the a(1) and b(1) axial-vector mesons
spellingShingle Quantum loops in radiative decays of the a(1) and b(1) axial-vector mesons
Roca, Luis
Chiral perturbation theory
Unitary approach
Scalar mesons
title_short Quantum loops in radiative decays of the a(1) and b(1) axial-vector mesons
title_full Quantum loops in radiative decays of the a(1) and b(1) axial-vector mesons
title_fullStr Quantum loops in radiative decays of the a(1) and b(1) axial-vector mesons
title_full_unstemmed Quantum loops in radiative decays of the a(1) and b(1) axial-vector mesons
title_sort Quantum loops in radiative decays of the a(1) and b(1) axial-vector mesons
dc.creator.none.fl_str_mv Roca, Luis
Hosaka, A.
Oset, Eulogi
author Roca, Luis
author_facet Roca, Luis
Hosaka, A.
Oset, Eulogi
author_role author
author2 Hosaka, A.
Oset, Eulogi
author2_role author
author
dc.subject.none.fl_str_mv Chiral perturbation theory
Unitary approach
Scalar mesons
topic Chiral perturbation theory
Unitary approach
Scalar mesons
description 10 pages, 4 figures.-- ISI Article Identifier: 000251895400004.-- ArXiv pre-print available at: http://arxiv.org/abs/hep-ph/0611075
publishDate 2007
dc.date.none.fl_str_mv 2007
2008
2008
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/9123
url http://hdl.handle.net/10261/9123
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://dx.doi.org/10.1016/j.physletb.2007.10.035
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 2373 bytes
text/plain
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
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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