1,721,070 research outputs found
Qcd Nonleading Corrections To Weak Decays In the Dimensional Scheme
No full textWe compute the next-to-leading-order QCD corrections to weak four-fermion interactions, introducing a scheme that does not require an explicit definition of gamma5 in d dimensions. This scheme greatly reduces the difficulties in calculating the two-loop anomalous dimensions; we recover results obtained in the literature
Scaling Behavior of the Deconfinement Temperature For Su(2) Pure Gauge-theory At Finite Temperature
No full textResults of a Monte Carlo simulation of SU(2) pure gauge theory at finite temperature are presented. The standard single plaquette action and the improved action à la Symanzik are used. The scaling figures for the deconfinement temperature of both actions are presented. © 1985
Large infra-red corrections in QCD processes
No full textThe effect of soft gluon emission in hard processes is examined to all orders in QCD. Large corrections have been found, which sensibly modify the parton model results, and show the relevance of the appropriate kinematical limits in leptoproduction and in the Drell–Yan process
Mass singularities and coherent states in gauge theories
No full textThe problem of mass singularities is studied using the formalism of coherent states. The introduction of new states which account for both soft and hard radiation effects provides one with matrix elements which are free from infra-red and mass singularities at the leading logarithmic approximation. In QED our results coincide with those obtained from the renormalization group equations. The generalization to QCD agrees with perturbative calculations and provides a simple framework for evaluating the finite corrections to hard processes
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