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Grand unification and enhanced quantum gravitational effects.

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Calmet, Xavier [UCL] Hsu, Stephen D H Reeb, David

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.

Document type Article de périodique (Journal article) – Journal Article
Access type Accès libre
Publication date 2008
Journal information "Physical review letters" - Vol. 101, no. 17, p. 171802 (2008)
Peer reviewed yes
issn 0031-9007
Publication status Publié
Affiliation UCL - SC/PHYS - Département de physique
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Bibliographic reference Calmet, Xavier ; Hsu, Stephen D H ; Reeb, David. Grand unification and enhanced quantum gravitational effects.. In: Physical review letters, Vol. 101, no. 17, p. 171802 (2008)
Permanent URL http://hdl.handle.net/2078.1/23061