[Formula: see text] , [Formula: see text] mesons from lattice QCD in fully physical conditions
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We determine masses and mixing parameters of the η and η ' meson in lattice QCD. The calculations are carried out on a set of 13 ETMC gauge ensembles with N f = 2 + 1 + 1 (maximally) twisted-mass Clover-improved quarks. These ensemble cover four ... ...
