Article

Eta and eta' meson masses from Nf=2+1+1 twisted mass lattice QCD

11/2011;
Source: arXiv

ABSTRACT We determine mass and flavour content of eta and eta' states using Nf=2+1+1
Wilson twisted mass lattice QCD. We describe how those flavour singlet states
need to be treated in this lattice formulation. Results are presented for two
values of the lattice spacing, a~0.08 fm and a~0.09 fm, with a range of light
quark masses corresponding to values of the pion mass from 270 to 500 MeV and
fixed bare strange and charm quark mass values.

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