Kaon interferometry: A Sensitive probe of the QCD equation of state?

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 K_T ~ 1 GeV/c direct emission from the phase boundary becomes important, the emission duration signal, i.e., the R_out/R_side ratio, and its sensitivity to T_c (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 (R_i<9fm). Finite momentum resolution effects have a strong impact on the extracted HBT parameters (R_i and lambda) as well as on the ratio R_out/R_side.

scattering: heavy ion
gold
critical phenomena
quark gluon: plasma
hadron: gas
K: multiple production
correlation function: two-particle
Hanbury-Brown-Twiss effect
transport theory: relativistic
numerical calculations: Brookhaven RHIC Coll

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