Masses and decay constants of the light mesons in the quenched approximation using the tadpole--improved SW-clover action

Abstract

We present results for the masses and decay constants of the light mesons in quenched QCD using the standard gluon action and a tadpole--improved SW--clover fermionic action to reduce discretisation errors. The calculation has been carried out at fixed volume and three lattice spacings corresponding to $\beta =5.7$, $6.0$ and $6.2$. We make comparisons with the conventional SW--clover scheme. We use our results to extract continuum limits and to quantify the size of discretisation errors at smaller $\beta$-values.

Comments: 18 pages LaTeX + 9 compressed postscript figures. Requires epsf.sty (optional), aps.sty, aps12.sty, prabib.sty and revtex.sty - {\it not} espcrc2.sty. Contribution to Lattice 95, Melbourne. Postscript version of file (in 2 column format) can be found at ftp://suna.amtp.liv.ac.uk/pub/cmi/lat95/ in the file ms.ps