https://doi.org/10.1140/epjc/s10052-017-5232-8
Regular Article - Theoretical Physics
Thermal spectrum of pseudo-scalar glueballs and Debye screening mass from holography
Instituto de Física, Universidade Federal do Rio de Janeiro, Caixa Postal 68528, Rio de Janeiro, RJ, 21941-972, Brazil
* e-mail: braga@if.ufrj.br
Received:
13
June
2017
Accepted:
15
September
2017
Published online:
4
October
2017
The finite temperature spectrum of pseudo-scalar glueballs in a plasma is studied using a holographic model. The 
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.
© The Author(s), 2017
