Flipped SU(5) predicts δT/T

2005/10/31 by Bumseok Kyae, Qaisar Shafi
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Particle physics theoretical and experimental studies #astro-ph #hep-ph

paper · pdf · doi:10.1016/j.physletb.2006.03.007

published as Phys.Lett.B635:247-252,2006 · 1+15 pages, 6 figures, version to appear in Phys. Lett. B

arxiv created 2006/03/06 · openalex publication_date 2006/03/14 · arxiv updated 2011/05/12 · openalex created_date 2017/08/31 · openalex updated_date 2026/08/01

Abstract

We discuss hybrid inflation in supersymmetric flipped SU(5) model such that the cosmic microwave anisotropy δT/T is essentially proportional to (M/MP)2, where M denotes the symmetry breaking scale and MP (=2.4×1018GeV) is the reduced Planck mass. The magnitude of M determined from δT/T measurements can be consistent with the value inferred from the evolution of SU(3) and SU(2) gauge couplings. In other words, one could state that flipped SU(5) predicts (more precisely ‘postdicts’) δT/T. The scalar spectral index ns=0.993±0.007, the scalar to tensor ratio satisfies r≲10−6, while dns/dlnk≲4×10−4.

Citations

• Inflation and monopoles in supersymmetric SU(4)c × SU(2)L × SU(2)R
• δT/T and neutrino masses in SU(5)
• 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
• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)

Cited by

• Inflation In A Realistic SO(10) Model