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, Jochem
TARASOV, OV
JEGERLEHNER, F
RACZKA, P
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.
ELSEVIER SCIENCE BV
1992
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1647350
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. <em>PHYSICS LETTERS B</em>. 1992;293(3-4):437-444.
eng
info:eu-repo/semantics/altIdentifier/doi/10.1016/0370-2693(92)90909-N
info:eu-repo/semantics/altIdentifier/issn/0370-2693
info:eu-repo/semantics/altIdentifier/wos/A1992JV67900030
info:eu-repo/semantics/closedAccess