δT/T and neutrino masses in SU(5)

2004/04/30 by Bumseok Kyae, Qaisar Shafi · 2 citations
Physics and Astronomy · #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Particle physics theoretical and experimental studies #hep-ph

paper · pdf · doi:10.1016/j.physletb.2004.07.030

published as Phys.Lett.B597:321-327,2004 · 1+15 pages, no figure, version to appear in PLB

arxiv created 2004/07/27 · openalex publication_date 2004/07/28 · arxiv updated 2011/05/12 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/03

Abstract

We implement inflation in a supersymmetric SU(5) model with U(1) R-symmetry such that the cosmic microwave anisotropy δT/T is proportional to (M/MPlanck)2, where M∼MGUT=2–3×1016GeV, the SU(5) breaking scale, and MPlanck=2.4×1019GeV. The presence of a global U(1)X symmetry, spontaneously broken also at scale MGUT, provides an upper bound MGUT2/MPlanck∼1014GeV on the masses of SU(5) singlet right-handed neutrinos, which explains the mass scale associated with atmospheric neutrino oscillations. The SU(5) monopoles and U(1)X cosmic strings are inflated away. Although the doublet–triplet splitting requires fine-tuning, the MSSM μ problem is resolved and dimension five proton decay is strongly suppressed.

Citations

• Inflation and monopoles in supersymmetric SU(4)c × SU(2)L × SU(2)R
• Leptogenesis and neutrino oscillations within a predictive G(224)/SO(10) framework
• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Preliminary Maps and Basic Results
• GUT scale inflation, non-thermal leptogenesis, and atmospheric neutrino oscillations
• Unity of All Elementary-Particle Forces
• Particle Physics Models of Inflation and the Cosmological Density Perturbation

Cited by

• Flipped SU(5) predicts δT/T
• Inflation with realistic supersymmetricSO(10)