Effects of gravitational smearing on predictions of supergravity grand unification

Limits on gravitational smearing from the dominant dimension-5 operator (with a strength characterized by cM/2${\mathit{M}}_{\mathit{P}}$) are obtained using the CERN LEP data in supersymmetric SU(5) grand unification. The effects of c on the quasi-infrared fixed point solutions of ${\mathit{m}}_{\mathit{b}}$/${\mathit{m}}_{\mathrm{\tau }}$ unification are also analyzed. It is found that c>0 softens and cc on the upper bound of the Higgs triplet mass is analyzed and the existence of scaling induced by c is discussed. Tests for existence of gravitational smearing are discussed.