Small Yukawa couplings from type-I string theory and the inflationary solution to the strong CP andμproblems

2005/02/17 by O. J. Eyton-Williams, Oliver J Eyton-Williams, S. F. King +1 · 2 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Particle physics theoretical and experimental studies #hep-ph

paper · pdf · doi:10.1088/1126-6708/2005/06/040

published as JHEP0506:040,2005 · 23 pages

arxiv created 2005/02/17 · openalex publication_date 2005/06/16 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

We investigate the origin of phenomenologically interesting small Yukawa couplings in Type I string theory. Utilising the framework of intersecting sets of D9 and orthogonal D5 branes we demonstrate the connection between extra dimensional volumes and Yukawa couplings. For example, we show that extra dimensions with inverse lengths of 10⁸ GeV can lead to 10^-10 Yukawa couplings. String selection rules, arising from the D-Brane setup, impose non-trivial constraints on the set of allowed superpotentials. As a phenomenological application of these results we construct a type I string model of inflationary particle physics which involves small Yukawa couplings of order 10^-10, and simultaneously solves the strong CP and μ problem of the MSSM, via the vacuum expectation value of the inflaton field.

Citations

• Towards a No-Lose Theorem for NMSSM Higgs Discovery at the LHC
• NMSSM Higgs Discovery at the LHC
• TASI Lectures on D-Branes
• Particle Physics Models of Inflation and the Cosmological Density Perturbation

Cited by

• Dirac neutrinos and hybrid inflation from string theory
• Dark-matter sterile neutrinos in models with a gauge singlet in the Higgs sector