Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1993-03-30
Nucl.Phys. B408 (1993) 62-90
Physics
High Energy Physics
High Energy Physics - Phenomenology
24 pages and 4 figures (included), LaTeX style, UFPD-93/TH/23, UPRF-93-366, UTF-93-291
Scientific paper
10.1016/0550-3213(93)90133-A
Complete two-loop calculation of a dimensionally regularized Wilson loop with light-like segments is performed in the light-like axial gauge with the Mandelstam-Leibbrandt prescription for the gluon propagator. We find an expression which {\it exactly} coincides with the one previously obtained for the same Wilson loop in covariant Feynman gauge. The renormalization of Wilson loop is performed in the $\MS-$scheme using a general procedure tailored to the light-like axial gauge. We find that the renormalized Wilson loop obeys a renormalization group equation with the same anomalous dimensions as in covariant gauges. Physical implications of our result for investigation of infrared asymptotics of perturbative QCD are pointed out.
Bassetto Antonio
Korchemskaya Irina A.
Korchemsky Gregory P.
Nardelli Giuseppe
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