2008/05/31 by Xavier Calmet, Stephen D. H. Hsu, David Reeb · 7 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Noncommutative and Quantum Gravity Theories #Particle physics theoretical and experimental studies #hep-ph #hep-th
paper · pdf · doi:10.1103/physrevlett.101.171802
published as Phys.Rev.Lett.101:171802,2008 · 4 pages, 1 figure, revtex; minor changes in v2 (version published in Phys. Rev. Lett.)
openalex publication_date 2008/10/20 · arxiv created 2008/11/21 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
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.