Quantum Gravitational Effects and Grand Unification

Details Quantum Gravitational Effects and Grand Unification Quantum Gravitational Effects and Grand Unification

2008-09-23

arxiv.org/abs/0809.3953v1

AIP Conf.Proc.1078:432-434,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

3 pages, to appear in the proceedings of 16th International Conference on Supersymmetry and Unification of Fundamental Interac

Scientific paper

10.1063/1.3051985

In grand unified theories with large numbers of fields, renormalization effects significantly modify the scale at which quantum gravity becomes strong. This in turn can modify the boundary conditions for coupling constant unification, if higher dimensional operators induced by gravity are taken into consideration. We show that the generic size of, and the uncertainty in, these effects from gravity can be larger than the two-loop corrections typically considered in renormalization group analyses of unification. In some cases, gravitational effects of modest size can render unification impossible.

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