2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/202513We compute the light hadron mass spectrum in quenched lattice QCD at $β= 6.0$ using the Sheikholeslami-Wohlert fermionic action. The calculation is done for several choices of the coefficient $c_{SW}$, including $c_{SW} = 0$ and the recently proposed optimal value $c_{SW} = 1.769$. We find that the individual masses change by up to 30\% under $O(a)$ improvement. The spectrum calculation suggests $c_{SW} \approx 1.4$ for the optimal value of the coefficient.15 pages, uuencoded Z-compressed postscript file. Also available from http://www.desy.de/pub/preprints/desy/1996High Energy Physics - Latticetext