Particle Interferometry: New Theoretical Results
摘要
By measuring hadronic single-particle spectra and two-particle correlations in heavy-ion collisions, the size and dynamical state of the collision fireball at freeze-out can be reconstructed. I discuss the relevant theoretical methods and their limitations. By applying the formalism to recent pion correlation data from Pb+Pb collisions at CERN we demonstrate that the collision zone has undergone strong transverse growth before freeze-out (by a factor 2-3 in each direction), and that it expands both longitudinally and transversally. From the thermal and flow energy density at freeze-out the energy density at the onset of transverse expansion can be estimated from conservation laws. It comfortably exceeds the critical value for the transition to color deconfined matter.
引用
@article{arxiv.nucl-th/9710065,
title = {Particle Interferometry: New Theoretical Results},
author = {Ulrich Heinz},
journal= {arXiv preprint arXiv:nucl-th/9710065},
year = {2007}
}
备注
Talk given at the 5th Rio de Janeiro International Workshop on Relativistic Aspects of Nuclear Physics, Rio de Janeiro, 27.-29. Aug. 1997, to appear in the Proceedings (World Scientific; T. Kodama, ed.) . Includes 5 ps figures and uses bbox.sty, sprocl.sty