STOP-ANTISTOP AND SBOTTOM-ANTISBOTTOM PRODUCTION AT LHC: A ONE-LOOP SEARCH FOR MODEL PARAMETERS DEPENDENCE

We have computed the one-loop electroweak expression of diagonal and nondiagonal stop-antistop and sbottom-antisbottom production from initial state gluons at LHC. We have investigated the possibility that the one-loop effects exhibit a dependence on "extra" supersymmetric parameters different from the final squark masses. Our results, given for a choice of twelve SUSY benchmark points in the MSSM with mSUGRA symmetry breaking, show that in some cases a mild dependence might arise, at the percent relative level, of not simple experimental detection.