Thermal spectrum of pseudo-scalar glueballs and Debye screening mass from holography
| Autor: | Nelson R. F. Braga, Luiz F. Ferreira |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: | |
| Zdroj: | European Physical Journal C: Particles and Fields, Vol 77, Iss 10, Pp 1-8 (2017) |
| Druh dokumentu: | article |
| ISSN: | 1434-6044 1434-6052 |
| DOI: | 10.1140/epjc/s10052-017-5232-8 |
| Popis: | Abstract The finite temperature spectrum of pseudo-scalar glueballs in a plasma is studied using a holographic model. The $$ 0^{-+}$$ 0-+ glueball is represented by a pseudo-scalar (axion) field living in a five dimensional geometry that comes from a solution of Einstein equations for gravity coupled with a dilaton scalar field. The spectral function obtained from the model shows a clear peak corresponding to the quasi-particle ground state. Analyzing the variation of the position of the peak with temperature, we describe the thermal behavior of the Debye screening mass of the plasma. As a check of consistency, the zero temperature limit of the model is also investigated. The glueball masses obtained are consistent with previous lattice results. |
| Databáze: | Directory of Open Access Journals |
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