Bottomonium dissociation in a finite density plasma
We present a holographic description of the thermal behavior of bb¯ heavy vector mesons inside a plasma at finite temperature and density. The meson dissociation in the medium is represented by the decrease in the height of the spectral function peaks. In order to find a description for the evolutio...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2017-10-01
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| Series: | Physics Letters B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269317306597 |
| _version_ | 1818056458986586112 |
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| author | Nelson R.F. Braga Luiz F. Ferreira |
| author_facet | Nelson R.F. Braga Luiz F. Ferreira |
| author_sort | Nelson R.F. Braga |
| collection | DOAJ |
| description | We present a holographic description of the thermal behavior of bb¯ heavy vector mesons inside a plasma at finite temperature and density. The meson dissociation in the medium is represented by the decrease in the height of the spectral function peaks. In order to find a description for the evolution of the quasi-states with temperature and chemical potential it is crucial to use a model that is consistent with the decay constant behavior. The reason is that the height of a spectral function peak is related to the value of the zero temperature decay constant of the corresponding particle. AdS/QCD holographic models are in general not consistent with the observation that decay constants of heavy vector mesons decrease with radial excitation level. However, it was recently shown that using a soft wall background and calculating the correlation functions at a finite position of anti-de Sitter space, associated with an ultraviolet energy scale, it is possible to describe the observed behavior. Here we extend this proposal to the case of finite temperature T and chemical potential μ. A clear picture of the dissociation of bottomonium states as a function of μ and T emerges from the spectral function. The energy scales where the change in chemical potential leads to changes in the thermal properties of the mesons is consistent with QCD expectations. |
| first_indexed | 2024-12-10T12:29:10Z |
| format | Article |
| id | doaj.art-05bec136f5804c558c0ea2c32e440f94 |
| institution | Directory Open Access Journal |
| issn | 0370-2693 |
| language | English |
| last_indexed | 2024-12-10T12:29:10Z |
| publishDate | 2017-10-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj.art-05bec136f5804c558c0ea2c32e440f942022-12-22T01:48:51ZengElsevierPhysics Letters B0370-26932017-10-01773313319Bottomonium dissociation in a finite density plasmaNelson R.F. Braga0Luiz F. Ferreira1Corresponding author.; Instituto de Física, Universidade Federal do Rio de Janeiro, Caixa Postal 68528, RJ 21941-972, BrazilInstituto de Física, Universidade Federal do Rio de Janeiro, Caixa Postal 68528, RJ 21941-972, BrazilWe present a holographic description of the thermal behavior of bb¯ heavy vector mesons inside a plasma at finite temperature and density. The meson dissociation in the medium is represented by the decrease in the height of the spectral function peaks. In order to find a description for the evolution of the quasi-states with temperature and chemical potential it is crucial to use a model that is consistent with the decay constant behavior. The reason is that the height of a spectral function peak is related to the value of the zero temperature decay constant of the corresponding particle. AdS/QCD holographic models are in general not consistent with the observation that decay constants of heavy vector mesons decrease with radial excitation level. However, it was recently shown that using a soft wall background and calculating the correlation functions at a finite position of anti-de Sitter space, associated with an ultraviolet energy scale, it is possible to describe the observed behavior. Here we extend this proposal to the case of finite temperature T and chemical potential μ. A clear picture of the dissociation of bottomonium states as a function of μ and T emerges from the spectral function. The energy scales where the change in chemical potential leads to changes in the thermal properties of the mesons is consistent with QCD expectations.http://www.sciencedirect.com/science/article/pii/S0370269317306597 |
| spellingShingle | Nelson R.F. Braga Luiz F. Ferreira Bottomonium dissociation in a finite density plasma Physics Letters B |
| title | Bottomonium dissociation in a finite density plasma |
| title_full | Bottomonium dissociation in a finite density plasma |
| title_fullStr | Bottomonium dissociation in a finite density plasma |
| title_full_unstemmed | Bottomonium dissociation in a finite density plasma |
| title_short | Bottomonium dissociation in a finite density plasma |
| title_sort | bottomonium dissociation in a finite density plasma |
| url | http://www.sciencedirect.com/science/article/pii/S0370269317306597 |
| work_keys_str_mv | AT nelsonrfbraga bottomoniumdissociationinafinitedensityplasma AT luizfferreira bottomoniumdissociationinafinitedensityplasma |