Finite Temperature Meson Correlation Functions in HTL Approximation

We calculate temporal correlators with meson quantum numbers in the deconfined phase of QCD using the hard thermal loop (HTL) approximation. In this way medium effects such as thermal masses and Landau damping in the quark-gluon plasma are taken into account. We show that both effects lead to competing modifications of the free mesonic correlation functions. We find that correlators in scalar channels are only moderately influenced by the HTL medium effects, while the HTL-vertex corrections lead to divergent vector correlators.