Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2009-09-08
Phys. Rev. D80 (2009) 094019
Physics
High Energy Physics
High Energy Physics - Phenomenology
LaTeX, 12 pages, 10 figures, version published on PRD
Scientific paper
10.1103/PhysRevD.80.094019
We study scalar glueballs and scalar mesons at $T \neq 0$ in the soft wall holographic QCD model. We find that, using the Anti-de Sitter-Black Hole metric for all values of the temperature, the masses of the hadronic states decrease and the widths become broader when T increases, and there are temperatures for which the states disappear from the scalar glueball and scalar meson spectral functions. However, the values of the temperatures in correspondence of which such phenomena occur are low, of the order of 40-60 MeV. A consistent holographic description of in-medium effects on hadron properties should include the Hawking-Page transition, which separates the phase with the Anti-de Sitter metric at small temperatures from the phase with Anti-de Sitter-Black Hole metric at high temperatures.
Colangelo Pietro
Giannuzzi Floriana
Nicotri Stefano
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