R. Harlander et al., CORRECTIONS OF O(ALPHA-ALPHA(S)) TO THE DECAY OF THE Z-BOSON INTO BOTTOM QUARKS, Physics letters. Section B, 426(1-2), 1998, pp. 125-132
For the vertex corrections to the partial decay rate T(Z --> b<(b) ove
r bar>) involving the top quark only the leading terms of order act, i
n the 1/M-t expansion are known. In this work we compute the missing n
ext-to-leading corrections. They turn out to be equally important as t
he leading term and therefore have to be included into an O(alpha alph
a(s)) analysis to arrive at reliable predictions. (C) 1998 Elsevier Sc
ience B.V. All rights reserved.