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We present a complete 1-loop study of the electroweak corrections to theprocess $ug\to dW^+$ in MSSM and SM.  The occurrence of a number of remarkable properties in the behavior of thehelicity amplitudes at high energies is stressed, and the crucial role of thevirtual SUSY contributions in establishing them, is emphasized. The approach toasymptopia of these amplitudes is discussed, comparing the effects of thelogarithmic and constant contributions to the mass suppressed ones, which arerelevant at lower energies. Applying crossing to $ug\to d W^+$, we obtain allsubprocesses needed for the 1-loop electroweak corrections to$W^\pm$-production at LHC. The SUSY model dependence of such a production isthen studied, and illustrations are given for the transverse $W^{\pm}$ momentumdistribution, as well as the angular distribution in the subprocess center ofmass.

Remarkable virtual SUSY effects in $W^{\pm}$ production at high energy hadron colliders