Simple observables from fat link fermion actions - art. no. 094501

A comparison is made of the (quenched) light hadron spectrum and of simple matrix elements for a hypercubic fermion action (based on a fixed point act ion) and the clover action, both using fat links, at a lattice spacing a si milar or equal to 0.18 fm. Renormalization constants fur the naive and impr oved vector current and the naive axial vector current are computed using W ard identities. The renormalization factors are very close to unity, and th e spectroscopy of light hadrons and the pseudoscalar and vector decay const ants agree well with simulations at smaller lattice spacings (and with expe riment). [S0556-2821(99)00519-6].