Going to the light front with contour deformations
Autor(a) principal: | |
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Data de Publicação: | 2022 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10174/32873 https://doi.org/10.1103/physrevd.105.034009 |
Resumo: | We explore a new method to calculate the valence light-front wave function of a system of two interacting particles, which is based on contour deformations combined with analytic continuation methods to project the Bethe-Salpeter wave function onto the light front. In this proof-of-concept study, we solve the Bethe-Salpeter equation for a scalar model and find excellent agreement between the light-front wave functions obtained with contour deformations and those obtained with the Nakanishi method frequently employed in the literature. The contour-deformation method is also able to handle extensions of the scalar model that mimic certain features of QCD such as unequal masses and complex singularities. In principle the method is suitable for computing parton distributions on the light front such as parton distribution functions, transverse momentum distributions and generalized parton distributions in the future. |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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7160 |
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Going to the light front with contour deformationsBethe-Salpeter equationBound statesNonperturbative effects in field theoryQuantum chromodynamicsWe explore a new method to calculate the valence light-front wave function of a system of two interacting particles, which is based on contour deformations combined with analytic continuation methods to project the Bethe-Salpeter wave function onto the light front. In this proof-of-concept study, we solve the Bethe-Salpeter equation for a scalar model and find excellent agreement between the light-front wave functions obtained with contour deformations and those obtained with the Nakanishi method frequently employed in the literature. The contour-deformation method is also able to handle extensions of the scalar model that mimic certain features of QCD such as unequal masses and complex singularities. In principle the method is suitable for computing parton distributions on the light front such as parton distribution functions, transverse momentum distributions and generalized parton distributions in the future.FCT (Fundação para a Ciência e a Tecnologia)American Physical Society2022-12-27T16:11:35Z2022-12-272022-02-10T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://hdl.handle.net/10174/32873http://hdl.handle.net/10174/32873https://doi.org/10.1103/physrevd.105.034009porGernot Eichmann, Eduardo Ferreira, and Alfred Stadler, "Going to the light front with contour deformations", Phys. Rev. D105, 034009 (2022)https://journals.aps.org/prd/pdf/10.1103/PhysRevD.105.034009ndndstadler@uevora.pt347Eichmann, GernotFerreira, EduardoStadler, Alfredinfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-01-03T19:34:27Zoai:dspace.uevora.pt:10174/32873Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T01:21:57.643711Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Going to the light front with contour deformations |
title |
Going to the light front with contour deformations |
spellingShingle |
Going to the light front with contour deformations Eichmann, Gernot Bethe-Salpeter equation Bound states Nonperturbative effects in field theory Quantum chromodynamics |
title_short |
Going to the light front with contour deformations |
title_full |
Going to the light front with contour deformations |
title_fullStr |
Going to the light front with contour deformations |
title_full_unstemmed |
Going to the light front with contour deformations |
title_sort |
Going to the light front with contour deformations |
author |
Eichmann, Gernot |
author_facet |
Eichmann, Gernot Ferreira, Eduardo Stadler, Alfred |
author_role |
author |
author2 |
Ferreira, Eduardo Stadler, Alfred |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Eichmann, Gernot Ferreira, Eduardo Stadler, Alfred |
dc.subject.por.fl_str_mv |
Bethe-Salpeter equation Bound states Nonperturbative effects in field theory Quantum chromodynamics |
topic |
Bethe-Salpeter equation Bound states Nonperturbative effects in field theory Quantum chromodynamics |
description |
We explore a new method to calculate the valence light-front wave function of a system of two interacting particles, which is based on contour deformations combined with analytic continuation methods to project the Bethe-Salpeter wave function onto the light front. In this proof-of-concept study, we solve the Bethe-Salpeter equation for a scalar model and find excellent agreement between the light-front wave functions obtained with contour deformations and those obtained with the Nakanishi method frequently employed in the literature. The contour-deformation method is also able to handle extensions of the scalar model that mimic certain features of QCD such as unequal masses and complex singularities. In principle the method is suitable for computing parton distributions on the light front such as parton distribution functions, transverse momentum distributions and generalized parton distributions in the future. |
publishDate |
2022 |
dc.date.none.fl_str_mv |
2022-12-27T16:11:35Z 2022-12-27 2022-02-10T00:00:00Z |
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://hdl.handle.net/10174/32873 http://hdl.handle.net/10174/32873 https://doi.org/10.1103/physrevd.105.034009 |
url |
http://hdl.handle.net/10174/32873 https://doi.org/10.1103/physrevd.105.034009 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
Gernot Eichmann, Eduardo Ferreira, and Alfred Stadler, "Going to the light front with contour deformations", Phys. Rev. D105, 034009 (2022) https://journals.aps.org/prd/pdf/10.1103/PhysRevD.105.034009 nd nd stadler@uevora.pt 347 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.publisher.none.fl_str_mv |
American Physical Society |
publisher.none.fl_str_mv |
American Physical Society |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
instname_str |
Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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1799136701520543744 |