Pseudoscalar singlet physics with staggered fermions

Details Pseudoscalar singlet physics with staggered fermions Pseudoscalar singlet physics with staggered fermions

2005-09-30

arxiv.org/abs/hep-lat/0509193v1

PoS LAT2005 (2005) 083

Physics

High Energy Physics

High Energy Physics - Lattice

Talk presented at Lattice 2005 (Hadron spectrum and quark masses), 6 pages, 3 figures

Scientific paper

We report on progress in measuring disconnected correlators associated with pseudoscalar flavor-singlet mesons. This will eventually allow us to compute the masses of the eta and eta' mesons. Flavor-singlet physics also presents an interesting test of the staggered fermion formulation, as disconnected correlators are sensitive to whether the same action governs both sea quarks and valence quarks. It can also help test the validity of the ``fourth-root trick'' used in unquenched lattice calculations where the number of flavors $N_f<4$.

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