Exclusive production of pions and the pion distribution amplitude

Detalhes bibliográficos
Autor(a) principal: Fagundes, D. A.
Data de Publicação: 2020
Outros Autores: Luna, E. G.S., Natale, A. A. [UNESP], Peláez, M.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.1088/1361-6471/ab6947
http://hdl.handle.net/11449/200211
Resumo: Considering, as a limit case, an approximately flat pion distribution amplitude, which is determined from the hardest, in momentum space, solution of the Bethe-Salpeter equation for the pion wave function, we compute the pion transition form factor Fπγγ ∗ (Q2) and the pion form factor F π(Q 2), taking into account the LO as well as NLO form of the hard coefficient function entering the leading-twist factorization formula. We also compute the exclusive photoproduction of pions pairs at high energies, γγ →π+π-, where perturbative QCD can be used to compute the hard scattering matrix elements. We verify that the existent data for exclusive pion production can be reasonably described as a function of such a flat distribution amplitude.
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spelling Exclusive production of pions and the pion distribution amplitudenon-perturbative QCDpion distribution amplitudepion transition form factorConsidering, as a limit case, an approximately flat pion distribution amplitude, which is determined from the hardest, in momentum space, solution of the Bethe-Salpeter equation for the pion wave function, we compute the pion transition form factor Fπγγ ∗ (Q2) and the pion form factor F π(Q 2), taking into account the LO as well as NLO form of the hard coefficient function entering the leading-twist factorization formula. We also compute the exclusive photoproduction of pions pairs at high energies, γγ →π+π-, where perturbative QCD can be used to compute the hard scattering matrix elements. We verify that the existent data for exclusive pion production can be reasonably described as a function of such a flat distribution amplitude.Departamento de Ciencias Exatas e Educacao Universidade Federal de Santa Catarina - Campus BlumenauInstituto de Física Universidade Federal Do Rio Grande Do sul, Caixa Postal 15051, 91501-970, RSInstituto de Física Facultad de Ingeniería Universidad de la República, J. H. y Reissig 565Instituto de Física Teórica Universidade Estadual Paulista (UNESP), Rua Dr. Bento T. Ferraz, Bloco II, 271Instituto de Física Teórica Universidade Estadual Paulista (UNESP), Rua Dr. Bento T. Ferraz, Bloco II, 271Universidade Federal de Santa Catarina (UFSC)Universidade Federal Do Rio Grande Do sulUniversidad de la RepúblicaUniversidade Estadual Paulista (Unesp)Fagundes, D. A.Luna, E. G.S.Natale, A. A. [UNESP]Peláez, M.2020-12-12T02:00:34Z2020-12-12T02:00:34Z2020-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1088/1361-6471/ab6947Journal of Physics G: Nuclear and Particle Physics, v. 47, n. 4, 2020.1361-64710954-3899http://hdl.handle.net/11449/20021110.1088/1361-6471/ab69472-s2.0-85082428334Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal of Physics G: Nuclear and Particle Physicsinfo:eu-repo/semantics/openAccess2021-10-23T12:31:27Zoai:repositorio.unesp.br:11449/200211Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T17:15:13.670171Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Exclusive production of pions and the pion distribution amplitude
title Exclusive production of pions and the pion distribution amplitude
spellingShingle Exclusive production of pions and the pion distribution amplitude
Fagundes, D. A.
non-perturbative QCD
pion distribution amplitude
pion transition form factor
title_short Exclusive production of pions and the pion distribution amplitude
title_full Exclusive production of pions and the pion distribution amplitude
title_fullStr Exclusive production of pions and the pion distribution amplitude
title_full_unstemmed Exclusive production of pions and the pion distribution amplitude
title_sort Exclusive production of pions and the pion distribution amplitude
author Fagundes, D. A.
author_facet Fagundes, D. A.
Luna, E. G.S.
Natale, A. A. [UNESP]
Peláez, M.
author_role author
author2 Luna, E. G.S.
Natale, A. A. [UNESP]
Peláez, M.
author2_role author
author
author
dc.contributor.none.fl_str_mv Universidade Federal de Santa Catarina (UFSC)
Universidade Federal Do Rio Grande Do sul
Universidad de la República
Universidade Estadual Paulista (Unesp)
dc.contributor.author.fl_str_mv Fagundes, D. A.
Luna, E. G.S.
Natale, A. A. [UNESP]
Peláez, M.
dc.subject.por.fl_str_mv non-perturbative QCD
pion distribution amplitude
pion transition form factor
topic non-perturbative QCD
pion distribution amplitude
pion transition form factor
description Considering, as a limit case, an approximately flat pion distribution amplitude, which is determined from the hardest, in momentum space, solution of the Bethe-Salpeter equation for the pion wave function, we compute the pion transition form factor Fπγγ ∗ (Q2) and the pion form factor F π(Q 2), taking into account the LO as well as NLO form of the hard coefficient function entering the leading-twist factorization formula. We also compute the exclusive photoproduction of pions pairs at high energies, γγ →π+π-, where perturbative QCD can be used to compute the hard scattering matrix elements. We verify that the existent data for exclusive pion production can be reasonably described as a function of such a flat distribution amplitude.
publishDate 2020
dc.date.none.fl_str_mv 2020-12-12T02:00:34Z
2020-12-12T02:00:34Z
2020-01-01
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/10.1088/1361-6471/ab6947
Journal of Physics G: Nuclear and Particle Physics, v. 47, n. 4, 2020.
1361-6471
0954-3899
http://hdl.handle.net/11449/200211
10.1088/1361-6471/ab6947
2-s2.0-85082428334
url http://dx.doi.org/10.1088/1361-6471/ab6947
http://hdl.handle.net/11449/200211
identifier_str_mv Journal of Physics G: Nuclear and Particle Physics, v. 47, n. 4, 2020.
1361-6471
0954-3899
10.1088/1361-6471/ab6947
2-s2.0-85082428334
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Journal of Physics G: Nuclear and Particle Physics
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.source.none.fl_str_mv Scopus
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_ 1808128779799756800

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