Y (3940) as a mixed charmonium-molecule state

Detalhes bibliográficos
Autor(a) principal: Albuquerque, R. M. [UNESP]
Data de Publicação: 2014
Outros Autores: Dias, J. M., Nielsen, M., Zanetti, C. M.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.1103/PhysRevD.89.076007
http://hdl.handle.net/11449/227698
Resumo: Using the QCD sum rules approach, we study the mass and the decay widths of the Y(3940) state, assuming that it can be described by a mixed charmonium-molecule scalar state, i.e., a mixture between the χc0 charmonium and D*D̄* molecule. Using a current with JPC=0++, we estimate for the mixing angle, θ=(76.0±5.0)°, resulting in a mass value of MY=(3.95±0.11)GeV, which is in reasonable agreement with the experimental mass of the Y(3940) state. For the decay width, we evaluate the channels Y→J/ψω and Y→γγ. We find the values ΓY→J/ψω≈(1.7±0.6)MeV and ΓY→γ γ≈(1.6±1.3)KeV, respectively. We also study the decay process of this state into channels containing DD̄ mesons in the final state. The result for the order of magnitude of the product ΓY→γγ ×ΓY→J/ψω∼O(103)KeV2 is also in reasonable agreement with the experimental data. We thus conclude that the present description of the Y(3940) as a mixed charmonium-molecule state is a possible scenario to explain the structure of such a state. © 2014 American Physical Society.
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spelling Y (3940) as a mixed charmonium-molecule stateUsing the QCD sum rules approach, we study the mass and the decay widths of the Y(3940) state, assuming that it can be described by a mixed charmonium-molecule scalar state, i.e., a mixture between the χc0 charmonium and D*D̄* molecule. Using a current with JPC=0++, we estimate for the mixing angle, θ=(76.0±5.0)°, resulting in a mass value of MY=(3.95±0.11)GeV, which is in reasonable agreement with the experimental mass of the Y(3940) state. For the decay width, we evaluate the channels Y→J/ψω and Y→γγ. We find the values ΓY→J/ψω≈(1.7±0.6)MeV and ΓY→γ γ≈(1.6±1.3)KeV, respectively. We also study the decay process of this state into channels containing DD̄ mesons in the final state. The result for the order of magnitude of the product ΓY→γγ ×ΓY→J/ψω∼O(103)KeV2 is also in reasonable agreement with the experimental data. We thus conclude that the present description of the Y(3940) as a mixed charmonium-molecule state is a possible scenario to explain the structure of such a state. © 2014 American Physical Society.Instituto de Física Teórica, Universidade Estadual Paulista, R.Dr. Bento Teobaldo Ferraz, 271, 01140-070 São Paulo, São PauloInstituto de Física, Universidade de São Paulo, C.P. 66318, 05389-970 São Paulo, São PauloFaculdade de Tecnologia, Universidade Do Estado Do Rio de Janeiro, Pólo Industrial, Rod. Presidente Dutra Km 298, 27537-000 Resende, Rio de JaneiroInstituto de Física Teórica, Universidade Estadual Paulista, R.Dr. Bento Teobaldo Ferraz, 271, 01140-070 São Paulo, São PauloUniversidade Estadual Paulista (UNESP)Universidade de São Paulo (USP)Universidade do Estado do Rio de Janeiro (UERJ)Albuquerque, R. M. [UNESP]Dias, J. M.Nielsen, M.Zanetti, C. M.2022-04-29T07:14:33Z2022-04-29T07:14:33Z2014-04-10info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1103/PhysRevD.89.076007Physical Review D - Particles, Fields, Gravitation and Cosmology, v. 89, n. 7, 2014.1550-23681550-7998http://hdl.handle.net/11449/22769810.1103/PhysRevD.89.0760072-s2.0-84898638301Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengPhysical Review D - Particles, Fields, Gravitation and Cosmologyinfo:eu-repo/semantics/openAccess2022-04-29T07:14:33Zoai:repositorio.unesp.br:11449/227698Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T13:58:41.602284Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Y (3940) as a mixed charmonium-molecule state
title Y (3940) as a mixed charmonium-molecule state
spellingShingle Y (3940) as a mixed charmonium-molecule state
Albuquerque, R. M. [UNESP]
title_short Y (3940) as a mixed charmonium-molecule state
title_full Y (3940) as a mixed charmonium-molecule state
title_fullStr Y (3940) as a mixed charmonium-molecule state
title_full_unstemmed Y (3940) as a mixed charmonium-molecule state
title_sort Y (3940) as a mixed charmonium-molecule state
author Albuquerque, R. M. [UNESP]
author_facet Albuquerque, R. M. [UNESP]
Dias, J. M.
Nielsen, M.
Zanetti, C. M.
author_role author
author2 Dias, J. M.
Nielsen, M.
Zanetti, C. M.
author2_role author
author
author
dc.contributor.none.fl_str_mv Universidade Estadual Paulista (UNESP)
Universidade de São Paulo (USP)
Universidade do Estado do Rio de Janeiro (UERJ)
dc.contributor.author.fl_str_mv Albuquerque, R. M. [UNESP]
Dias, J. M.
Nielsen, M.
Zanetti, C. M.
description Using the QCD sum rules approach, we study the mass and the decay widths of the Y(3940) state, assuming that it can be described by a mixed charmonium-molecule scalar state, i.e., a mixture between the χc0 charmonium and D*D̄* molecule. Using a current with JPC=0++, we estimate for the mixing angle, θ=(76.0±5.0)°, resulting in a mass value of MY=(3.95±0.11)GeV, which is in reasonable agreement with the experimental mass of the Y(3940) state. For the decay width, we evaluate the channels Y→J/ψω and Y→γγ. We find the values ΓY→J/ψω≈(1.7±0.6)MeV and ΓY→γ γ≈(1.6±1.3)KeV, respectively. We also study the decay process of this state into channels containing DD̄ mesons in the final state. The result for the order of magnitude of the product ΓY→γγ ×ΓY→J/ψω∼O(103)KeV2 is also in reasonable agreement with the experimental data. We thus conclude that the present description of the Y(3940) as a mixed charmonium-molecule state is a possible scenario to explain the structure of such a state. © 2014 American Physical Society.
publishDate 2014
dc.date.none.fl_str_mv 2014-04-10
2022-04-29T07:14:33Z
2022-04-29T07:14:33Z
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/10.1103/PhysRevD.89.076007
Physical Review D - Particles, Fields, Gravitation and Cosmology, v. 89, n. 7, 2014.
1550-2368
1550-7998
http://hdl.handle.net/11449/227698
10.1103/PhysRevD.89.076007
2-s2.0-84898638301
url http://dx.doi.org/10.1103/PhysRevD.89.076007
http://hdl.handle.net/11449/227698
identifier_str_mv Physical Review D - Particles, Fields, Gravitation and Cosmology, v. 89, n. 7, 2014.
1550-2368
1550-7998
10.1103/PhysRevD.89.076007
2-s2.0-84898638301
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Physical Review D - Particles, Fields, Gravitation and Cosmology
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)
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