Speaker
Zeno Kordov
Description
We present the first lattice analysis of the pseudoscalar mesons with consideration for the mixing between the flavour-singlet states $\pi^0$, $\eta$ and $\eta'$. We extract the masses and flavour compositions of the pseudoscalar meson nonet in nf = 1 + 1 + 1 lattice QCD+QED around an SU(3)-flavour symmetric point, and observe interesting features of the extracted data, along with preliminary extrapolation results at physical pion mass via a novel method. We also resolve the mass splitting in the $\pi^0$ and $\eta$ on our ensembles, which is found to exhibit behaviour that is simply related to the corresponding flavour compositions.
