Bose-Einstein correlations from opaque sources
Henning Heiselberg1 - Axel P. Vischer2
1 NORDITA, Blegdamsvej 17, DK-2100 Copenhagen Ø.,
Denmark
2 Niels Bohr Institute, DK-2100, Copenhagen Ø, Denmark
Received: 20 March 1997
Abstract
Bose-Einstein correlations in relativistic heavy ion collisions are
very different for opaque sources than for transparent ones. The
Bose-Einstein radius parameters measured in two-particle correlation functions
depend sensitively on the mean free path of the particles. In
particular we find that the outward radius parameter for an opaque source is
smaller than the sideward radius parameter
for sufficiently short duration
of emission. A long duration of emission can compensate the
opacity reduction of the longitudinal radius parameter and explain the
experimental measurements of very similar side- and
outward radius parameters.
Copyright Springer-Verlag
