Remarks on transient photon production in heavy ion collisions

Details Remarks on transient photon production in heavy ion collisions Remarks on transient photon production in heavy ion collisions

2003-12-16

arxiv.org/abs/hep-ph/0312222v1

Phys.Rev. D71 (2005) 085015

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages

Scientific paper

10.1103/PhysRevD.71.085015

In this note, we discuss the derivation of a formula that has been used in the literature in order to compute the number of photons emitted by a hot or dense system during a finite time. Our derivation is based on a variation of the standard operator-based $S$-matrix approach. The shortcomings of this formula are then emphasized, which leads to a negative conclusion concerning the possibility of using it to predict transient effects for the photon rate.

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