Grand unification through gravitational effects

Journal Article · Mon Feb 01 00:00:00 EST 2010 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.81.035007· OSTI ID:21409202

Calmet, Xavier ^[1]; Hsu, Stephen D. H.; Reeb, David ^[2]

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1. Physics and Astronomy, University of Sussex, Falmer, Brighton, BN1 9QH (United Kingdom)
2. Institute of Theoretical Science, University of Oregon, Eugene, Oregon 97403 (United States)

We systematically study the unification of gauge couplings in the presence of (one or more) effective dimension-5 operators cHG{sub {mu}{nu}G}{sup {mu}{nu}/}4M{sub pl}, 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 M{sub X} 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.

• OSTI ID: 21409202
• Journal Information: Physical Review. D, Particles Fields, Vol. 81, Issue 3; Other Information: DOI: 10.1103/PhysRevD.81.035007; (c) 2010 The American Physical Society; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
COUPLING
EXPECTATION VALUE
GAUGE INVARIANCE
GRAND UNIFIED THEORY
GRAVITATIONAL INTERACTIONS
HIGGS BOSONS
HIGGS MODEL
MANY-DIMENSIONAL CALCULATIONS
MASS
PROTONS
SIMULATION
SO-10 GROUPS
SU-5 GROUPS
SUPERGRAVITY
WILSON LOOP
BARYONS
BASIC INTERACTIONS
BOSONS
ELEMENTARY PARTICLES
FERMIONS
FIELD THEORIES
HADRONS
INTERACTIONS
INVARIANCE PRINCIPLES
LIE GROUPS
MATHEMATICAL MODELS
NUCLEONS
PARTICLE MODELS
POSTULATED PARTICLES
QUANTUM FIELD THEORY
SO GROUPS
SU GROUPS
SYMMETRY GROUPS
UNIFIED GAUGE MODELS
UNIFIED-FIELD THEORIES