Speaker
Mr
P. Thomas Jahn
(TU Darmstadt)
Description
At high temperatures, the topological susceptibility of QCD becomes relevant for the properties of axion dark matter. However, the strong suppression of non-zero topological sectors causes ordinary sampling techniques to fail, since fluctuations of the topological charge can only be measured reliably if enough tunneling events between sectors occur. We present a new method to circumvent this problem based on a combination of gradient flow and reweighting techniques. Moreover, we quote continuum extrapolated results for the topological susceptibility in the quenched approximation at $2.5~T_\mathrm c$ and $4.1~T_\mathrm c$.
Primary author
Mr
P. Thomas Jahn
(TU Darmstadt)
Co-authors
Dr
Daniel Robaina
(TU Darmstadt)
Prof.
Guy D. Moore
(TU Darmstadt)