Jg. Korner et al., ONE-LOOP QCD MASS EFFECTS IN THE PRODUCTION OF POLARIZED BOTTOM AND TOP QUARKS, Zeitschrift fur Physik. C, Particles and fields, 63(4), 1994, pp. 575-579
The analytic expressions for the production cross sections of polarize
d bottom and top quarks in e+e-annihilation are explicitly derived at
the one-loop order of strong interactions. Chirality-violating mass ef
fects will reduce the longitudinal spin polarization for the light qua
rk pairs by an amount of 3%, when one properly considers the massless
limit for the final quarks. Numerical estimates of longitudinal spin p
olarization effects in the processes e+e--->bb(g)BAR and e+e--->tt(g)B
AR are presented.