Speaker
Jonas Turnwald
(TU Darmstadt)
Description
The thermal photon rate is an import observable for understanding the quark-gluon plasma, and can be calculated from lattice QCD by reconstructing the spectral function of the vector current correlator. Since this correlator receives a large ultraviolet contribution from the vacuum, only the thermal part of the correlator is considered, which significantly simplifies the reconstruction. Since this reconstruction is still ill-conditioned, we estimate the systematic error by comparing different methods, namely model fits, Backus-Gilbert and Gaussian Process Regression. This is performed with lattice data for quenched QCD at $T\sim1.5~T_{c}$ and 2+1 flavor QCD at $T\sim1.2~T_{pc}~$.
Authors
Sajid Ali
(Bielefeld University, Germany)
Dibyendu Bala
(Bielefeld University)
Anthony Francis
(National Yang-Ming Chiao Tung University)
Greg Jackson
(SUBATECH, Nantes)
Olaf Kaczmarek
Jonas Turnwald
(TU Darmstadt)
Tristan Ueding
(Bielefeld University)
Nicolas Wink
(TU Darmstadt)
