Strange and nonstrange quark mass dependence of elastic light resonances from SU(3) unitarized chiral perturbation theory to one loop

We study the light quark mass dependence of the f _0(600), к(800), ρ(770), and K*(892) resonance parameters generated from elastic meson-meson scattering using unitarized one-loop chiral perturbation theory. First, we show that it is possible to fit simultaneously all experimental scattering data up...

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Detalles Bibliográficos
Autores: Nebreda Manjón, Jenifer, Peláez Sagredo, José Ramón
Tipo de recurso: artículo
Fecha de publicación:2010
País:España
Institución:Universidad Complutense de Madrid (UCM)
Repositorio:Docta Complutense
Idioma:inglés
OAI Identifier:oai:docta.ucm.es:20.500.14352/44844
Acceso en línea:https://hdl.handle.net/20.500.14352/44844
Access Level:acceso abierto
Palabra clave:51-73
π-π scattering
Phase-shift analysis
Gev-c
K scattering
Momentum-transfer
Scalar mesons
π&π
Qcd
Particles
A(0)(980)
Física-Modelos matemáticos
Física matemática
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oai_identifier_str oai:docta.ucm.es:20.500.14352/44844
network_acronym_str ES
network_name_str España
repository_id_str
spelling Strange and nonstrange quark mass dependence of elastic light resonances from SU(3) unitarized chiral perturbation theory to one loopNebreda Manjón, JeniferPeláez Sagredo, José Ramón51-73π-π scatteringPhase-shift analysisGev-cK scatteringMomentum-transferScalar mesonsπ&πQcdParticlesA(0)(980)Física-Modelos matemáticosFísica matemáticaWe study the light quark mass dependence of the f _0(600), к(800), ρ(770), and K*(892) resonance parameters generated from elastic meson-meson scattering using unitarized one-loop chiral perturbation theory. First, we show that it is possible to fit simultaneously all experimental scattering data up to 0.8-1 GeV together with lattice results on decay constants and scattering lengths up to a pion mass of 400 MeV, using chiral parameters compatible with existing determinations. Then, the strange and nonstrange quark masses are varied from the chiral limit up to values of interest for lattice studies. In these amplitudes, the mass and width of the ρ(770) and K*(892) present a similar and smooth quark mass dependence. In contrast, both scalars present a similar nonanalyticity at high quark masses. Nevertheless, the f_0(600) dependence on the nonstrange quark mass is stronger than for the к(800) and the vectors. We also confirm the lattice assumption of quark mass independence of the vector two-meson coupling that, in contrast, is violated for scalars. As a consequence, vector widths are very well approximated by the Kawarabayashi-Suzuki-Riazuddin- Fayyazuddin relation, and their masses are shown to scale like their corresponding meson decay constants.Amer Physical SocUniversidad Complutense de Madrid20102010-03-0120102010-03-01journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/44844reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/448442026-06-02T12:44:21Z
dc.title.none.fl_str_mv Strange and nonstrange quark mass dependence of elastic light resonances from SU(3) unitarized chiral perturbation theory to one loop
title Strange and nonstrange quark mass dependence of elastic light resonances from SU(3) unitarized chiral perturbation theory to one loop
spellingShingle Strange and nonstrange quark mass dependence of elastic light resonances from SU(3) unitarized chiral perturbation theory to one loop
Nebreda Manjón, Jenifer
51-73
π-π scattering
Phase-shift analysis
Gev-c
K scattering
Momentum-transfer
Scalar mesons
π&π
Qcd
Particles
A(0)(980)
Física-Modelos matemáticos
Física matemática
title_short Strange and nonstrange quark mass dependence of elastic light resonances from SU(3) unitarized chiral perturbation theory to one loop
title_full Strange and nonstrange quark mass dependence of elastic light resonances from SU(3) unitarized chiral perturbation theory to one loop
title_fullStr Strange and nonstrange quark mass dependence of elastic light resonances from SU(3) unitarized chiral perturbation theory to one loop
title_full_unstemmed Strange and nonstrange quark mass dependence of elastic light resonances from SU(3) unitarized chiral perturbation theory to one loop
title_sort Strange and nonstrange quark mass dependence of elastic light resonances from SU(3) unitarized chiral perturbation theory to one loop
dc.creator.none.fl_str_mv Nebreda Manjón, Jenifer
Peláez Sagredo, José Ramón
author Nebreda Manjón, Jenifer
author_facet Nebreda Manjón, Jenifer
Peláez Sagredo, José Ramón
author_role author
author2 Peláez Sagredo, José Ramón
author2_role author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv 51-73
π-π scattering
Phase-shift analysis
Gev-c
K scattering
Momentum-transfer
Scalar mesons
π&π
Qcd
Particles
A(0)(980)
Física-Modelos matemáticos
Física matemática
topic 51-73
π-π scattering
Phase-shift analysis
Gev-c
K scattering
Momentum-transfer
Scalar mesons
π&π
Qcd
Particles
A(0)(980)
Física-Modelos matemáticos
Física matemática
description We study the light quark mass dependence of the f _0(600), к(800), ρ(770), and K*(892) resonance parameters generated from elastic meson-meson scattering using unitarized one-loop chiral perturbation theory. First, we show that it is possible to fit simultaneously all experimental scattering data up to 0.8-1 GeV together with lattice results on decay constants and scattering lengths up to a pion mass of 400 MeV, using chiral parameters compatible with existing determinations. Then, the strange and nonstrange quark masses are varied from the chiral limit up to values of interest for lattice studies. In these amplitudes, the mass and width of the ρ(770) and K*(892) present a similar and smooth quark mass dependence. In contrast, both scalars present a similar nonanalyticity at high quark masses. Nevertheless, the f_0(600) dependence on the nonstrange quark mass is stronger than for the к(800) and the vectors. We also confirm the lattice assumption of quark mass independence of the vector two-meson coupling that, in contrast, is violated for scalars. As a consequence, vector widths are very well approximated by the Kawarabayashi-Suzuki-Riazuddin- Fayyazuddin relation, and their masses are shown to scale like their corresponding meson decay constants.
publishDate 2010
dc.date.none.fl_str_mv 2010
2010-03-01
2010
2010-03-01
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/20.500.14352/44844
url https://hdl.handle.net/20.500.14352/44844
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 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 reponame:Docta Complutense
instname:Universidad Complutense de Madrid (UCM)
instname_str Universidad Complutense de Madrid (UCM)
reponame_str Docta Complutense
collection Docta Complutense
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869420413493182464
score 15.300724

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