2021 Impact factor 4.991
Particles and Fields
Eur. Phys. J. C 4, 327-338
DOI 10.1007/s100529800771

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

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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