Continuum extrapolation of charmonium correlators at non-zero temperature
- Mr. Hauke SANDMEYER
- Mr. Hauke SANDMEYER (Bielefeld University)
For the investigation of in-medium modifications of quarkonia and for determining heavy quark diffusion transport coefficients, correlation functions of heavy mesons play a crucial role. For the first time we performed a continuum extrapolation of charmonium correlators in the vector and pseudoscalar channels based on non-perturbatively clover improved Wilson fermions in quenched lattice QCD. We performed calculations at 4 different lattice spacings, spatial extents between 96 and 192, aspect ratio from 1/6 to 1/2, for 5 temperatures between $T/T_c = 0.75$ and $T/T_c = 2.2$. We interpolated between different quark masses to match to the same charmonium mass over different lattice setups. Afterwards we extrapolated the renormalized correlators to the continuum. We also looked at the reconstructed correlators in the continuum. While the temperature dependence in the pseudoscalar channel is small, we observe distinct temperature effects in the vector channel possibly related to changes in the low frequency, transport contribution part of the vector spectral function.
Preferred track (if multiple tracks have been selected)
Nonzero Temperature and Density