2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/38655We propose a method to study lattice QCD at finite temperature and chemical potential. We compare it with direct results and with the Glasgow method by using n_f=4 QCD at Im(μ)\neq 0. We locate the critical endpoint (E) of QCD on the Re(μ)-T plane. In this study we use n_f=2+1 dynamical staggered quarks with semi-realistic masses on L_t=4 lattices.5 pages, 3 Figures. Talk given at EPS HEP2001, July 12-18,2001 BudapestHigh Energy Physics - Latticetext