J/Ψ photoproduction in peripheral AA collisions
The exclusive photoproduction of the heavy vector mesons J=Ψ is investigated in the context of peripheral lead-lead collisions for the energies available at the LHC, ps ¼ 2.76 TeV and sp ¼ 5.02 TeV. Using the light-cone color dipole formalism, the rapidity distribution was calculated in two centrali...
| Autores: | , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2017 |
| País: | Brasil |
| Institución: | Universidade Federal do Rio Grande do Sul (UFRGS) |
| Repositorio: | Repositório Institucional da UFRGS |
| Idioma: | inglés |
| OAI Identifier: | oai:www.lume.ufrgs.br:10183/172592 |
| Acceso en línea: | http://hdl.handle.net/10183/172592 |
| Access Level: | acceso abierto |
| Palabra clave: | Aceleradores de partículas Colisao de ions pesados Fotoproducao de mesons Mésons psi |
| Sumario: | The exclusive photoproduction of the heavy vector mesons J=Ψ is investigated in the context of peripheral lead-lead collisions for the energies available at the LHC, ps ¼ 2.76 TeV and sp ¼ 5.02 TeV. Using the light-cone color dipole formalism, the rapidity distribution was calculated in two centrality bins at 50%–70% and 70%–90% in order to evaluate its robustness in extrapolating down to a smaller impact parameter. A modified photon flux is introduced, without change in the photonuclear cross section in relation to the ultraperipheral (UPC) case. Results were obtained for the two regions analyzed, which presented a maximum difference of 27% in frontal rapidity for the two regions. Comparing the results for ps ¼ 2.76 TeV and ps ¼ 5.02 TeV, an increase was verified of approximately half the one obtained in the ultraperipheral regime in the central rapidity region. |
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