Color evaporation and elastic [ípsilon] photoproduction at DESY HERA

The diffractive photoproduction of vector mesons is usually described by considering the two-gluon (Pomeron) exchange, the nondiagonal parton distributions, and the contribution of the real part to the cross section. In this Brief Report we analyze the diffractive photoproduction of the Y at DESY HE...

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Detalhes bibliográficos
Autores: Gay Ducati, Maria Beatriz, Goncalves, Victor Paulo Barros, Mariotto, Cristiano Brenner
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2002
País:Brasil
Recursos:Universidade Federal do Rio Grande do Sul (UFRGS)
Repositorio:Repositório Institucional da UFRGS
Idioma:inglés
OAI Identifier:oai:www.lume.ufrgs.br:10183/104011
Acesso em linha:http://hdl.handle.net/10183/104011
Access Level:acceso abierto
Palavra-chave:Modelo de cor
Interações elétron-próton
Fotoproducao de mesons
Interações foton-próton
Pomerons
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spelling 2014-10-01T02:10:41Z20020556-2821http://hdl.handle.net/10183/104011000312069The diffractive photoproduction of vector mesons is usually described by considering the two-gluon (Pomeron) exchange, the nondiagonal parton distributions, and the contribution of the real part to the cross section. In this Brief Report we analyze the diffractive photoproduction of the Y at DESY HERA using an alternative model, the color evaporation model (CEM), where the cross section is simply determined by the boson-gluon cross section and an assumption for the production of the colorless state. We verify that, as in the J/Ψ case, the HERA data for this process can be well described by the CEM. Moreover, we propose the analysis of the ratio R=σY /σJ/Ψ to discriminate between the different approaches.application/pdfengPhysical review. D, Particles and fields. Vol. 65, no. 3 (Feb. 2002), 037503 4p.Modelo de corInterações elétron-prótonFotoproducao de mesonsInterações foton-prótonPomeronsColor evaporation and elastic [ípsilon] photoproduction at DESY HERAEstrangeiroinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSGay Ducati, Maria BeatrizGoncalves, Victor Paulo BarrosMariotto, Cristiano BrennerORIGINAL000312069.pdf000312069.pdfTexto completo (inglês)application/pdf53177http://www.lume.ufrgs.br/bitstream/10183/104011/1/000312069.pdf06f5b8ad82edfaf7d3c46a236f9fe048MD51TEXT000312069.pdf.txt000312069.pdf.txtExtracted Texttext/plain19753http://www.lume.ufrgs.br/bitstream/10183/104011/2/000312069.pdf.txte284dcecd8357e55c6cebfa3663aa25aMD52THUMBNAIL000312069.pdf.jpg000312069.pdf.jpgGenerated Thumbnailimage/jpeg1903http://www.lume.ufrgs.br/bitstream/10183/104011/3/000312069.pdf.jpg1fe24c35ba75cfdb4dded266bb5d1d0eMD5310183/1040112018-10-08 08:43:24.061oai:www.lume.ufrgs.br:10183/104011Repositório InstitucionalPUBhttps://lume.ufrgs.br/oai/requestlume@ufrgs.bropendoar:2018-10-08T11:43:24Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false
dc.title.pt_BR.fl_str_mv Color evaporation and elastic [ípsilon] photoproduction at DESY HERA
title Color evaporation and elastic [ípsilon] photoproduction at DESY HERA
spellingShingle Color evaporation and elastic [ípsilon] photoproduction at DESY HERA
Gay Ducati, Maria Beatriz
Modelo de cor
Interações elétron-próton
Fotoproducao de mesons
Interações foton-próton
Pomerons
title_short Color evaporation and elastic [ípsilon] photoproduction at DESY HERA
title_full Color evaporation and elastic [ípsilon] photoproduction at DESY HERA
title_fullStr Color evaporation and elastic [ípsilon] photoproduction at DESY HERA
title_full_unstemmed Color evaporation and elastic [ípsilon] photoproduction at DESY HERA
title_sort Color evaporation and elastic [ípsilon] photoproduction at DESY HERA
dc.creator.none.fl_str_mv Gay Ducati, Maria Beatriz
Goncalves, Victor Paulo Barros
Mariotto, Cristiano Brenner
author Gay Ducati, Maria Beatriz
author_facet Gay Ducati, Maria Beatriz
Goncalves, Victor Paulo Barros
Mariotto, Cristiano Brenner
author_role author
author2 Goncalves, Victor Paulo Barros
Mariotto, Cristiano Brenner
author2_role author
author
dc.subject.por.fl_str_mv Modelo de cor
Interações elétron-próton
Fotoproducao de mesons
Interações foton-próton
Pomerons
topic Modelo de cor
Interações elétron-próton
Fotoproducao de mesons
Interações foton-próton
Pomerons
description The diffractive photoproduction of vector mesons is usually described by considering the two-gluon (Pomeron) exchange, the nondiagonal parton distributions, and the contribution of the real part to the cross section. In this Brief Report we analyze the diffractive photoproduction of the Y at DESY HERA using an alternative model, the color evaporation model (CEM), where the cross section is simply determined by the boson-gluon cross section and an assumption for the production of the colorless state. We verify that, as in the J/Ψ case, the HERA data for this process can be well described by the CEM. Moreover, we propose the analysis of the ratio R=σY /σJ/Ψ to discriminate between the different approaches.
publishDate 2002
dc.date.issued.fl_str_mv 2002
dc.date.accessioned.fl_str_mv 2014-10-01T02:10:41Z
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dc.identifier.uri.fl_str_mv http://hdl.handle.net/10183/104011
dc.identifier.issn.pt_BR.fl_str_mv 0556-2821
dc.identifier.nrb.pt_BR.fl_str_mv 000312069
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000312069
url http://hdl.handle.net/10183/104011
dc.language.iso.fl_str_mv eng
language eng
dc.relation.ispartof.pt_BR.fl_str_mv Physical review. D, Particles and fields. Vol. 65, no. 3 (Feb. 2002), 037503 4p.
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reponame_str Repositório Institucional da UFRGS
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