The $\eta^\prime$ meson at the physical point with $N_f=2$ Wilson twisted mass fermions
Christopher Helmes, Bastian Knippschild, Bartosz Kostrzewa, Liuming, Liu, Christian Jost, Konstantin Ottnad, Carsten Urbach, Urs Wenger, Markus, Werner (for the ETM collaboration)
TL;DR
This study investigates the eta prime meson and topological susceptibility in two-flavor lattice QCD using Wilson twisted mass fermions, approaching the physical pion mass, and compares results to existing literature to assess discretization effects.
Contribution
It provides new lattice QCD results for the eta prime meson and topological susceptibility at the physical point with Wilson twisted mass fermions.
Findings
Results are consistent with literature values.
Discretization effects are analyzed and characterized.
Pion masses range from 340 MeV to the physical point.
Abstract
We present results for the eta prime meson and the topological susceptibility in two flavour lattice QCD. The results are obtained using Wilson twisted mass fermions at maximal twist with pion masses ranging from 340 MeV down to the physical point. A comparison to literature values is performed giving a handle on discretisation effects.
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