Unruh gamma radiation at RHIC?
  Varying the proposition that acceleration itself would simulate a thermal environment, we investigate the semiclassical photon radiation as a possible telemetric thermometer of accelerated charges. Based on the classical Jackson formula we obtain the equivalent photon intensity spectrum stemming from a constantly accelerated charge and demonstrate its resemblances to a thermal distribution for high transverse momenta. The inverse transverse slope differs from the famous Unruh temperature: it is larger by a factor of pi. We compare the resulting direct photon spectrum with experimental data for AuAu collisions at RHIC and speculate about further, analytically solvable acceleration histories. 
T. S. Biro (1), M. Gyulassy (2) and Z. Schram (3) ((1) Theory   Division, MTA KFKI Res. Inst. for Particle and Nuclear Physi...
hep-ph hep-th nucl-th