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Prediction of a photon peak in heavy ion collisions

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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 / ψ , the corresponding peak lies between 3 and 5 GeV and could be observed in heavy-ion collisions at the LHC.

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CASALDERREY SOLANA, Jorge and MATEOS, David (Mateos Solé). Prediction of a photon peak in heavy ion collisions. Physical Review Letters. 2009. Vol. 102, num. 19, pags. 192302-1-192302-4. ISSN 0031-9007. [consulted: 25 of June of 2026]. Available at: https://hdl.handle.net/2445/13295

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