About the isocurvature tension between axion and high scale inflationary models

2016/06/09 by Mariel Estevez, M. Estevez, O. Santillán · 6 citations
Physics and Astronomy · #Axion #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Higgs boson #Higgs field #Inflation (cosmology) #Particle physics theoretical and experimental studies #Scale (ratio) #Standard Model (mathematical formulation) #Symmetry (geometry) #Symmetry breaking #astro-ph.CO #hep-ph #hep-th

paper · pdf · doi:10.1140/epjc/s10052-016-4226-2

published in The European Physical Journal C 76(7) (Springer Science+Business Media)

arxiv created 2016/06/09 · openalex created_date 2016/06/24 · openalex publication_date 2016/07/01 · arxiv updated 2016/08/24 · openalex updated_date 2026/08/05

Abstract

The present work suggests that the isocurvature tension between axion and high energy inflationary scenarios may be avoided by considering a double field inflationary model involving the hidden Peccei–Quinn Higgs and the Standard Model one. Some terms in the lagrangian we propose explicitly violate the Peccei–Quinn symmetry but, at the present era, their effect is completely negligible. The resulting mechanism allows for a large value for the axion constant, of the order f_a∼ M_p , thus the axion isocurvature fluctuations are suppressed even when the scale of inflation H_inf is very high, of the order of H_inf∼ M_gut . This numerical value is typical in Higgs inflationary models. An analysis about topological defect formation in this scenario is also performed, and it is suggested that, under certain assumptions, their effect is not catastrophic from the cosmological point of view.

Citations

• Adiabatic and isocurvature perturbations for multifield generalized Einstein models
• A simple solution to the strong CP problem with a harmless axion
• QCD and instantons at finite temperature
• The Standard Model Higgs boson as the inflaton
• Large non-Gaussianity in non-minimal inflation