Speaker
Description
We report on the exploration of thermal QCD with $N_f=3$ flavours of $O(a)$-improved massless Wilson fermions up to electroweak-scale temperatures. We present results on screening masses at 12 temperatures ranging from 1 GeV to 165 GeV, in several flavor non-singlet mesonic channels, including the first and second non-static Matsubara sectors with frequencies 2πT and 4πT, respectively. For each temperature we have simulated 3 or 4 values of the lattice spacing, so as to perform the continuum limit extrapolation with confidence.
The implementation of random sources significantly enhances the signal-to-noise ratio for non-static correlators, while simultaneously improving the precision of previously determined static screening masses by up to an order of magnitude.
Our continuum-extrapolated results provide a comprehensive picture of the QCD screening spectrum across a wide temperature range. A comparison with next-to-leading order perturbative predictions reveals that non-perturbative contributions remain highly relevant even at the highest temperatures explored.