Radiative corrections in grand unified theories based on N=1 supergravity: nongauge theories

Sen, Ashoke (1984) Radiative corrections in grand unified theories based on N=1 supergravity: nongauge theories Physical Review D - Particles, Fields, Gravitation and Cosmology, 30 (12). pp. 2608-2616. ISSN 1550-7998

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Official URL: http://prd.aps.org/abstract/PRD/v30/i12/p2608_1

Related URL: http://dx.doi.org/10.1103/PhysRevD.30.2608

Abstract

Radiative corrections in grand unified theories (GUT's) based on N=1 supergravity are studied in the limit MPlanck→∞, with the gravitino mass mg fixed, to all orders in perturbation theory. In this paper we study the effect of nongauge interactions only. It is shown that the tree-level mass hierarchy is not destroyed by the radiative corrections, provided there is no light field of mass «MGUT, which transforms as a singlet under the subgroup that is unbroken at a scale above mg. It is also pointed out that in the minimal supersymmetric SU(5) model, the addition of arbitrary soft-supersymmetry-breaking terms in the Lagrangian do not, in general, preserve the mass hierarchy, unless the coefficients of the soft-breaking terms are fine tuned. The fine tuning is automatic if the supersymmetry-breaking terms come from an underlying supergravity theory.

Item Type:Article
Source:Copyright of this article belongs to The American Physical Society.
ID Code:44148
Deposited On:20 Jun 2011 12:57
Last Modified:20 Jun 2011 12:57

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