P. Gambino et A. Sirlin, RELATION BETWEEN SIN(2)(THETA)OVER-CAP(W)(M(Z)) AND SIN(2)THETA(LEPT)(EFF), Physical review. D. Particles and fields, 49(3), 1994, pp. 1160-1162
The relation between sin(2) theta(eff)(lept) frequently employed in CE
RN LEP analyses and the MS parameter sin(2)<(theta)over cap>(w)(m(z))
is discussed and their difference evaluated by means of an explicit ca
lculation.