Black-hole quasinormal modes and scalar glueballs in a finite-temperature AdS/QCD model

作者：Miranda Alex S^*; Bayona C A Ballon; Boschi Filho Henrique; Braga Nelson R F

来源：The Journal of High Energy Physics, 2009, 2009(11): 119.

DOI：10.1088/1126-6708/2009/11/119

• Gauge-gravity correspondence
• AdS-CFT Correspondence
• Phenomenological Models
• Black Holes

We use the holographic AdS/QCD soft-wall model to investigate the spectrum of scalar glueballs in a finite temperature plasma. In this model, glueballs are described by a massless scalar field in an AdS(5) black hole with a dilaton soft-wall background. Using AdS/CFT prescriptions, we compute the boundary retarded Green's function. The corresponding thermal spectral function shows quasiparticle peaks at low temperatures. We also compute the quasinormal modes of the scalar field in the soft-wall black hole geometry. The temperature and momentum dependences of these modes are analyzed. The positions and widths of the peaks of the spectral function are related to the frequencies of the quasinormal modes. Our numerical results are found employing the power series method and the computation of Breit-Wigner resonances.

• 出版日期2009-11