A note on dimension-5 operators in GUTs and their impact

Chakrabortty, Joydeep ; Raychaudhuri, Amitava (2009) A note on dimension-5 operators in GUTs and their impact Physics Letters B, 673 (1). pp. 57-62. ISSN 0370-2693

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Official URL: http://linkinghub.elsevier.com/retrieve/pii/S03702...

Related URL: http://dx.doi.org/10.1016/j.physletb.2009.01.065

Abstract

Quantum gravity or string compactification can lead to effective dimension-5 operators in Grand Unified Theories which modify the gauge kinetic terms. We exhaustively discuss the group-theoretic nature of such operators for the popular SU(5), SO(10), and E(6) models. In particular, for SU(5) only a Higgs in the 200 representation can help bring the couplings to unification below the Planck scale and in consistency with proton decay limits while for a supersymmetric version 24, 75, or 200 representations are all acceptable. The results also have a direct application in non-universality of gaugino masses in a class of supersymmetric models where identical group-theoretic features obtain.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Grand Unified Theories
ID Code:43252
Deposited On:10 Jun 2011 14:04
Last Modified:18 May 2016 00:19

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