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We improve and update the discussion, given some years ago by mycollaborators and me, of infrared divergences and Bremsstrahlung in one-loopgluon scattering probabilities in lightcone gauge. In that work, we showed thatadding soft and collinear gluon radiation, satisfying simple Lorentz invariantconstraints, not only cancelled all IR divergences, but resulted in compactexpressions for the consequent scattering probabilities. Here we impose lessrestrictive (albeit noncovariant) constraints on the unobserved radiation,which increases the high energy (s) fixed momentum transfer (t) behavior of thetotal probabilities from -ln^2s to ln s ln t, a behavior shared by the (IRdivergent) elastic probabilities. Using this new treatment we also make a muchmore detailed comparison of the lightcone results to covariant calculationsusing dimensional regularization, finding complete agreement between the twostyles of calculation.

Resolution of Infrared Divergences in Gluon-Gluon Scattering Regulated on a Lightcone Worldsheet Lattice