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# 36th Annual International Symposium on Lattice Field Theory

22-28 July 2018
Kellogg Hotel and Conference Center
EST timezone

## Topological Susceptibility to High Temperatures via Reweighting

Jul 24, 2018, 3:00 PM
20m
Centennial (Kellogg Hotel and Conference Center)

### Centennial

#### Kellogg Hotel and Conference Center

219 S Harrison Rd, East Lansing, MI 48824
Nonzero Temperature and Density

### 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)