Screening of large supersymmetry breaking in low-energy physics

Abstract

We consider a supersymmetric theory in which there is a large difference of mass scales between the low-energy sector and the heavy supersymmetric sector that derives from bilinear softsupersymmetry-breaking terms. We demonstrate that in such a theory "natural" relations, predicted by supersymmetry, between low-energy-physics parameters receive corrections from loops involving the heavy sector particles that grow logarithmically with the heavy-mass scale. Since a priori, such corrections might have grown quadratically with the heavy-mass scale, we see that low-energy physics is screened against large corrections. However, we also point out that natural low-energy relations will receive (large) quadratic corrections if there are large trilinear softsupersymmetry-breaking terms.