Photons from strange-quark annihilation in a quark-gluon plasma

We compute the energy spectrum of photons which originate from the quark-annihilation process ss¯→γg in quark-gluon plasma. The spectrum peaks at an energy $E_{\gamma }^{\max \mathrm{\sim }2m_s\mathrm{\sim }400}$ MeV in the rest frame of the plasma. We expect one photon from the above process in the energy range of 2$m_s$±0.25$m_s$ per hundred quark-gluon plasmas of a size R=3 fm and a lifetime τ=6 fm/c formed in nuclear collisions.