Bose_einstein Correlations of Unstable Particles

Abstract

Within a field theoretical formalism suited to treat inhomogeneous hot quantum systems, we derive the two-particle correlation function for particles having a spectral width gamma in the region of their emission. We find, that this correlation function measures the radius R0 of the thermal source only in case gamma*R0 > 1.

Comments: 8 pages, GSI-Preprint 1 figure appendend as uucode