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arXiv · hep-ph/0005107

Two-particle correlation from a relativistic fluid with a first order phase transition

Kenji Morita·Shin Muroya·Hiroki Nakamura·Chiho Nonaka
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Abstract

We numerically calculate two-particle correlation functions of CERN-SPS 158 A GeV Pb+Pb central collisions based on a (3+1)-dimensional relativistic hydrodynamics with a first order phase transition. We analyze the pair momentum dependence of pion source sizes extracted from the Yano-Koonin-Podgoretski\uı (YKP) parametrization which is expected to give the source sizes directly. We find that, even in the case of the first order phase transition, the collective expansion and surface dominant freeze-out of the fluid naturally lead to the opaque source for which the interpretation of the temporal source parameter as the emission duration breaks down.

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Kenji Morita, Shin Muroya, Hiroki Nakamura, Chiho Nonaka. 2000-05-11. Two-particle correlation from a relativistic fluid with a first order phase transition. https://doi.org/10.1016/s0375-9474(00)00395-x

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