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: email@example.com
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