2-LOOP O(ALPHA(S)G(MU)M(T)(2)) CORRECTIONS TO THE PARTIAL DECAY WIDTH OF THE Z(0) INTO B(B)OVER-BAR FINAL-STATES IN THE LARGE TOP-MASS LIMIT

Fleischer J, TARASOV OV, JEGERLEHNER F, RACZKA P (1992)
PHYSICS LETTERS B 293(3-4): 437-444.

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Abstract
The QCD correction to the one-loop electroweak radiative correction of the partial Z-decay width into b-quarks is calculated analytically in the limit of large top mass. The calculation is performed in the 't Hooft gauge with an arbitrary gauge parameter and QCD gauge-invariance is explicitly verified on-shell. Gluon bremsstrahlung is taken into account by integrating over the whole gluon phase space. All calculations, including the bremsstrahlung, are performed in the dimensional regularization scheme. We find a screening of the leading one-loop top mass effects by m(t)2-->m(t)2 [1-1/3(pi2-3)alpha(s)/pi] which is of the same magnitude as the one known for the rho-parameter.
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Fleischer J, TARASOV OV, JEGERLEHNER F, RACZKA P. 2-LOOP O(ALPHA(S)G(MU)M(T)(2)) CORRECTIONS TO THE PARTIAL DECAY WIDTH OF THE Z(0) INTO B(B)OVER-BAR FINAL-STATES IN THE LARGE TOP-MASS LIMIT. PHYSICS LETTERS B. 1992;293(3-4):437-444.
Fleischer, J., TARASOV, O. V., JEGERLEHNER, F., & RACZKA, P. (1992). 2-LOOP O(ALPHA(S)G(MU)M(T)(2)) CORRECTIONS TO THE PARTIAL DECAY WIDTH OF THE Z(0) INTO B(B)OVER-BAR FINAL-STATES IN THE LARGE TOP-MASS LIMIT. PHYSICS LETTERS B, 293(3-4), 437-444.
Fleischer, J., TARASOV, O. V., JEGERLEHNER, F., and RACZKA, P. (1992). 2-LOOP O(ALPHA(S)G(MU)M(T)(2)) CORRECTIONS TO THE PARTIAL DECAY WIDTH OF THE Z(0) INTO B(B)OVER-BAR FINAL-STATES IN THE LARGE TOP-MASS LIMIT. PHYSICS LETTERS B 293, 437-444.
Fleischer, J., et al., 1992. 2-LOOP O(ALPHA(S)G(MU)M(T)(2)) CORRECTIONS TO THE PARTIAL DECAY WIDTH OF THE Z(0) INTO B(B)OVER-BAR FINAL-STATES IN THE LARGE TOP-MASS LIMIT. PHYSICS LETTERS B, 293(3-4), p 437-444.
J. Fleischer, et al., “2-LOOP O(ALPHA(S)G(MU)M(T)(2)) CORRECTIONS TO THE PARTIAL DECAY WIDTH OF THE Z(0) INTO B(B)OVER-BAR FINAL-STATES IN THE LARGE TOP-MASS LIMIT”, PHYSICS LETTERS B, vol. 293, 1992, pp. 437-444.
Fleischer, J., TARASOV, O.V., JEGERLEHNER, F., RACZKA, P.: 2-LOOP O(ALPHA(S)G(MU)M(T)(2)) CORRECTIONS TO THE PARTIAL DECAY WIDTH OF THE Z(0) INTO B(B)OVER-BAR FINAL-STATES IN THE LARGE TOP-MASS LIMIT. PHYSICS LETTERS B. 293, 437-444 (1992).
Fleischer, Jochem, TARASOV, OV, JEGERLEHNER, F, and RACZKA, P. “2-LOOP O(ALPHA(S)G(MU)M(T)(2)) CORRECTIONS TO THE PARTIAL DECAY WIDTH OF THE Z(0) INTO B(B)OVER-BAR FINAL-STATES IN THE LARGE TOP-MASS LIMIT”. PHYSICS LETTERS B 293.3-4 (1992): 437-444.
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