Kaon Interferometry: A Sensitive Probe of the QCD Equation of State?
Abstract
We calculate the kaon HBT radius parameters for high energy heavy ion collisions, assuming a first order phase transition from a thermalized Quark-Gluon-Plasma to a gas of hadrons. At high transverse momenta KT ~ 1 GeV/c direct emission from the phase boundary becomes important, the emission duration signal, i.e., the Rout/Rside ratio, and its sensitivity to Tc (and thus to the latent heat of the phase transition) are enlarged. Moreover, the QGP+hadronic rescattering transport model calculations do not yield unusual large radii (Ri<9fm). Finite momentum resolution effects have a strong impact on the extracted HBT parameters (Ri and lambda) as well as on the ratio Rout/Rside.
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