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The European Physical Journal C
ISSN: 1434-6044 (printed version)
ISSN: 1434-6052 (electronic version)
Abstract Volume 4 Issue 2 (1998) pp 327-338
DOI 10.1007/s100529800771
theoretical physics:
Fine-tuning two-particle interferometry I: Effects from temperature gradients in the source
Boris Tomásik, Ulrich Heinz
Institut für Theoretische Physik, Universität Regensburg, D-93040 Regensburg, Germany
Received: 2 July 1997 / Revised version: 25 September 1997 / Published online: 23 February 1998
Abstract. A comprehensive model study of Bose-Einstein correlation radii in heavy ion collisions is presented. The starting point is a longitudinally and transversally expanding fireball, represented at freeze-out by an azimuthally symmetric emission function. The freeze-out temperature is allowed to feature transverse and temporal gradients. Their effects on the correlation radii are studied. In particular, we evaluate numerically their dependence on the transverse mass of the particle pairs and check a recent suggestion, based on analytical approximations, that for certain reasonable source parameters all three correlation radii satisfy simultaneously a $1/\sqrt{M_\perp}$ scaling.
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Online publication: June 23, 1998
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