PhysRevLett.101.171802.pdf (180.77 kB)
Grand unification and enhanced quantum gravitational effects
journal contribution
posted on 2023-06-08, 08:44 authored by Xavier CalmetXavier Calmet, Stephen D H Hsu, David ReebWe systematically study the unification of gauge couplings in the presence of (one or more) effective dimension-5 operators cHGµ¿Gµ¿/4Mpl, induced into the grand unified theory by gravitational interactions at the Planck scale. These operators alter the usual condition for gauge-coupling unification, which can, depending on the Higgs content H and vacuum expectation value, result in unification at scales MX significantly different than naively expected. We find nonsupersymmetric models of SU(5) and SO(10) unification, with natural Wilson coefficients c, that easily satisfy the constraints from proton decay. Furthermore, gauge-coupling unification at scales as high as the Planck scale seems feasible, possibly hinting at simultaneous unification of gauge and gravitational interactions. In the Appendix we work out the group theoretical aspects of this scenario for SU(5) and SO(10) unified groups in detail; this material is also relevant in the analysis of nonuniversal gaugino masses obtained from supergravity.
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Physical Review LettersISSN
0031-9007External DOI
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171802Volume
101Pages
4.0Department affiliated with
- Physics and Astronomy Publications
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- Yes
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- Yes
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2012-02-06First Open Access (FOA) Date
2016-03-22First Compliant Deposit (FCD) Date
2016-11-16Usage metrics
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