Y (3940) as a mixed charmonium-molecule state
Autor(a) principal: | |
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Data de Publicação: | 2014 |
Outros Autores: | , , |
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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Repositório Institucional da UNESP |
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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) |
repository.mail.fl_str_mv |
|
_version_ |
1808128299321262080 |