Holographic Vector Mesons from Spectral Functions at Finite Baryon or Isospin Density

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dc.contributor.author Erdmenger, Johanna
dc.contributor.author Kaminski, Matthias
dc.contributor.author Rust, Felix
dc.date.accessioned 2018-09-10T21:07:03Z
dc.date.available 2018-09-10T21:07:03Z
dc.date.issued 2008-02-19
dc.identifier.citation Erdmenger, J., Kaminski, M., Rust, F. (2008): Holographic Vector Mesons from Spectral Functions at Finite Baryon or Isospin Density, Physical Review D 77. http://dx.doi.org/10.1103/PhysRevD.77.046005 en_US
dc.identifier.uri http://ir.ua.edu/handle/123456789/3829
dc.description We consider gauge/gravity duality with flavor for the finite-temperature field theory dual of the AdSSchwarzschild black hole background with embedded D7-brane probes. In particular, we investigate spectral functions at finite baryon density in the black hole phase. We determine the resonance frequencies corresponding to meson-mass peaks as function of the quark mass over temperature ratio. We find that these frequencies have a minimum for a finite value of the quark mass. If the quotient of quark mass and temperature is increased further, the peaks move to larger frequencies. At the same time the peaks narrow, in agreement with the formation of nearly stable vector meson states which exactly reproduce the mesonmass spectrum found at zero temperature. We also calculate the diffusion coefficient, which has finite value for all quark mass to temperature ratios, and exhibits a first-order phase transition. Finally we consider an isospin chemical potential and find that the spectral functions display a resonance peak splitting, similar to the isospin meson-mass splitting observed in effective QCD models. en_US
dc.format.mimetype application/pdf en_US
dc.rights.uri https://creativecommons.org/licenses/by/4.0/
dc.title Holographic Vector Mesons from Spectral Functions at Finite Baryon or Isospin Density en_US
dc.type text en_US


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