Non-perturbative reheating and Nnaturalness



Hardy, Edward ORCID: 0000-0003-3263-6575
(2017) Non-perturbative reheating and Nnaturalness. JOURNAL OF HIGH ENERGY PHYSICS, 2017 (11). 125-.

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Abstract

We study models in which reheating happens only through non-perturbative processes. The energy transferred can be exponentially suppressed unless the inflaton is coupled to a particle with a parametrically small mass. Additionally, in some models a light scalar with a negative mass squared parameter leads to much more efficient reheating than one with a positive mass squared of the same magnitude. If a theory contains many sectors similar to the Standard Model coupled to the inflaton via their Higgses, such dynamics can realise the Nnaturalness solution to the hierarchy problem. A sector containing a light Higgs with a non-zero vacuum expectation value is dominantly reheated and there is little energy transferred to the other sectors, consistent with cosmological constraints. The inflaton must decouple from other particles and have a flat potential at large field values, in which case the visible sector UV cutoff can be raised to 10 TeV in a simple model.

Item Type: Article
Additional Information: 22 pages, 4 figures
Uncontrolled Keywords: Beyond Standard Model, Cosmology of Theories beyond the SM
Depositing User: Symplectic Admin
Date Deposited: 30 Nov 2017 14:35
Last Modified: 15 Mar 2024 13:35
DOI: 10.1007/JHEP11(2017)125
Open Access URL: https://link.springer.com/article/10.1007/JHEP11(2...
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3013217