Point-to-point Hadron Correlation Functions using the Sheikholeslami--Wohlert Action

Abstract

We calculate correlations between hadronic current operators as a function of their spatial separation, in a quenched lattice QCD simulation at $\beta=6.2$ on a $24^3\times48$ lattice. The lattice fermion formulation used is that due to Sheikholeslami and Wohlert. The correlation functions are then compared with the corresponding quantities calculated in the infinite volume chiral limit of the non-interacting theory. The ratio of the two quantities contains information on the vacuum structure of QCD. Results obtained are consistent with previous studies, and with known hadron phenomenology, although certain features of the fermion action used make it impossible to probe the $r\to0$ limit directly, thus limiting the accuracy possible.