Kaon Interferometry: A Sensitive Probe of the QCD Equation of State?
Sven Soff, Steffen A. Bass, David H. Hardtke, Sergey Y. Panitkin
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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