Casalderrey-Solana J, Mateos D. Prediction of a photon peak in relativistic heavy ion collisions.
PHYSICAL REVIEW LETTERS 2009;
102:192302. [PMID:
19518947 DOI:
10.1103/physrevlett.102.192302]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2008] [Indexed: 05/27/2023]
Abstract
We show that if a flavorless 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-N_{c} plasmas with a gravity dual. For the J/psi, the corresponding peak lies between 3 and 5 GeV and could be observed in heavy-ion collisions at the LHC.
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