A Photon Peak due to Strong Coupling
Abstract
We show that if a flavour-less vector meson remains bound after deconfinement, and if its limiting velocity in the quark-gluon plasma is subluminal, then this meson produces a distinct peak in the spectrum of thermal photons emitted by the plasma. We also demonstrate that this effect is a universal property of all strongly coupled, large- plasmas with a gravity dual. For the J/ the corresponding peak lies between 3 and 5 GeV and could be observed at the LHC.
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