The topological susceptibility and pion decay constant from lattice QCD

Details The topological susceptibility and pion decay constant from lattice QCD The topological susceptibility and pion decay constant from lattice QCD

2000-09-08

arxiv.org/abs/hep-lat/0009008v1

Physics

High Energy Physics

High Energy Physics - Lattice

A condensed hep-ph/0004180 (3 pages) presented at Confinement IV, Vienna, July 2000

Scientific paper

We study the topological susceptibility, chi, in two flavour lattice QCD. We find clear evidence for the expected suppression of chi at small quark mass. The estimate of the pion decay constant, f_pi = 105 +/-5 +18/-10 MeV, is consistent with the experimental value of approximately 93 MeV. We compare chi to the large-N_c prediction and find consistency over a large range of quark masses.

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