arXiv:1111.4817·v1·High Energy Physics — Phenomenology
Unruh gamma radiation at RHIC?
T. S. Biro (1) · M. Gyulassy (2) · Z. Schram (3) ((1) Theory Division, MTA KFKI Res. Inst. for Particle and Nuclear Physics, Budapest, Hungary (2) Dept. of Physics, Columbia University, NY, USA (3) Dept. of Theoretical Physics, University of Debrecen, Hungary)
Abstract
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.
Comments: LaTeX 5 pages, 2 eps figures, PACS numbers: 24.10.Pa, 25.75.Ag, 25.20.Lj Keywords: Thermal models, Unruh temperature, bremsstrahlung, photon spectra