The QCD topological charge and its thermal dependence: the role of the ${\eta }^{\prime }$

Angel Gómez Nicola, Jacobo Ruiz De Elvira, Andrea Vioque-Rodríguez

We analyze the contribution of the ${\eta }^{\prime }(958)$ meson in the first two non-trivial moments of the QCD topological charge distribution, namely, the topological susceptibility and the f…