Holographic meson melting

By C. Hoyos, K. Landsteiner, S. Montero. 2006

163 citations recorded by the source corpus.

The plasma phase at high temperatures of a strongly coupled gauge theory can be holographically modelled by an AdS black hole. Matter in the fundamental representation and in the quenched approximation is introduced through embedding D7-branes in the AdS-Schwarzschild background. Low spin mesons correspond to the fluctuations of the D7-brane world volume. As is well known by now, there are two different kinds of embeddings, either reaching down to the black hole horizon or staying outside of it. In the latter case the fluctuations of the D7-brane world volume represent stable low spin mesons. In the plasma phase we do not expect mesons to be stable but to melt at sufficiently high temperature. We model the late stages of this meson melting by the quasinormal modes of D7-brane fluctuations for the embeddings that do reach down to the horizon. The inverse of the imaginary part of the quasinormal frequency gives the typical relaxation time back to equilibrium of the meson perturbation in the hot plasma. We briefly comment on the possible application of our model to quarkonium suppression.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics, Statistical and Nonlinear Physics

View Paper: https://www.semanticscholar.org/paper/daa3a5c33de831fb847f1bdf21309be024f5ee32

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Citations in the corpus

Gauge/String Duality, Hot QCD and Heavy Ion Collisions (2011, background): “it spreads out across the entire plasma and its presence is reduced to diffuse disturbances of the supergravity and worldvolume fields, which are soon damped out [610, 611].”
Thermodynamics of the brane (2007, background): “Rather one finds a continuous and gapless spectrum of excitations [12, 13].”
Thermodynamics and instabilities of a strongly coupled anisotropic plasma (2011, background): “ersion relations can be calculated by extending the analysis of [97,111,177]. It is also interesting to understand the eects of the anisotropy on the meson dissociation phase transition uncovered in [178,111,179,180, 181]. One conclusion that can be anticipated is the fact that the in-medium meson l”
Holographic spectral functions and diffusion constants for fundamental matter (2007, background): “[36] examines the quasinormal modes in this channel directly and find qualitative evidence of this behaviour, as well.”
Quarks in an External Electric Field in Finite Temperature Large N Gauge Theory (2007, background): “The equation of motion for this ansatz has one intriguing difference from similar fluctuation calculations done elsewhere [19, 20, 21, 16]: Because of the presence of the current, there exists a term proportional to ∂t̃Φ × ∂ũΦ.”
Holographic operator mixing and quasinormal modes on the brane (2009, background): “Instead , if the D7-brane reaches the horizon, the modes are quasinormal with complex frequncies [7].”
Holographic phase transitions at finite chemical potential (2007, background): “The true quasi-particle excitations of the system, if any, correspond to ‘quasinormal modes’ of the D7-brane worldvolume fields [11].”
Flavor superconductivity from gauge/gravity duality (2009, background): “It is separated from the white meson melting region by the meson melting transition (blue line), see [25–27,29,32,50,52,53].”