Gaugino mass in the heterotic string with Scherk-Schwarz compactification

The generic observable sector gaugino mass in the weakly-coupled heterotic string compactified to four dimensions by the Scherk-Schwarz scheme (togeth er with hidden sector gaugino condensation inducing the super-Higgs effect with a vanishing cosmological constant) is shown to be nonzero at tree leve l, being of the order of the gravitino mass, module reasonable assumptions regarding the magnitude of the condensate and the Scherk-Schwarz mass param eters. (C) 1998 Elsevier Science B.V. All rights reserved.