Physics – Nuclear Physics – Nuclear Theory
Scientific paper
1996-10-10
Phys.Lett.B391:469-473,1997
Physics
Nuclear Physics
Nuclear Theory
10 pages, ReVTeX
Scientific paper
10.1016/S0370-2693(96)01504-3
We use the covariant current formalism to derive the general form of the 2-photon correlation function for fully chaotic sources. Motivated by the recent discussion in the literature we concentrate on the effects from the photon spin on the correlator. We show that for locally thermalized expanding sources, like those expected to be created in relativistic heavy ion collisions, the only change relative to 2-pion interferometry is a statistical factor 1/2 for the overall strength of the correlation which results from the experimental averaging over the photon spin.
Heinz Ulrich
Slotta Claus
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