Flipped GUT Inflation

Ellis, John; Huang, Wei-Chih; Gonzalo, Tomas E.; Harz, Julia

doi:10.1088/1475-7516/2015/03/039

Article
Report number	arXiv:1412.1460 ; KCL-PH-TH-2014-49 ; LCTS-2014-50 ; CERN-PH-TH-2014-241 ; KCL-PH-TH-2014-49 ; LCTS-2014-50 ; CERN-PH-TH-2014-241
Title	Flipped GUT Inflation
Author(s)	Ellis, John (King's Coll. London ; CERN) ; Gonzalo, Tomas E. (University Coll. London) ; Harz, Julia (University Coll. London) ; Huang, Wei-Chih (University Coll. London)
Publication	2015
Imprint	03 Dec 2014
Number of pages	21
Note	Comments: 21 pages, 4 figures 21 pages, 4 figures
In:	JCAP 03 (2015) 039
DOI	10.1088/1475-7516/2015/03/039
Subject category	Particle Physics - Phenomenology
Abstract	We analyse the prospects for constructing hybrid models of inflation that provide a dynamical realisation of the apparent closeness between the supersymmetric GUT scale and the possible scale of cosmological inflation. In the first place, we consider models based on the flipped SU(5)$\times$U(1) gauge group, which has no magnetic monopoles. In one model, the inflaton is identified with a sneutrino field, and in the other model it is a gauge singlet. In both cases we find regions of the model parameter spaces that are compatible with the experimental magnitudes of the scalar perturbations, $A_s$, and the tilt in the scalar perturbation spectrum, $n_s$, as well as with an indicative upper limit on the tensor-to-scalar perturbation ratio, $r$. We also discuss embeddings of these models into SO(10), which is broken at a higher scale so that its monopoles are inflated away.
Copyright/License	publication: © 2015-2026 The Author(s) (License: CC-BY-3.0), sponsored by SCOAP³ preprint: © 2014-2026 CERN (License: CC-BY-3.0)

$\emph{The $(\mu_F = \bar\mu_F, N_e)$ plane, showing the blue strip that is compatible with the experimental value of the scalar amplitude $A_s$, a band (shaded pink) that is compatible with the experimental range for the spectral tilt $n_s$, and a band (shaded green, with stripes) that is favoured by the experimental constraint on the tensor-to-scalar ratio, taken to be $r < 0.16$.}$ $\emph{Allowed region in the $m_h$, $\bar\la_F$ and $\la_{10}$ parameter space for which $\langle h \rangle \sim 10^{16}$ GeV and the system is in its true minimum.}$ $\emph{The $(\mu_S, M_S)$ planes for $N_e = 40$ e-foldings (left panel), $N_e = 50$ (central panel) and $N_e = 60$ (right panel). In each case, the blue strip is compatible with the experimental value of the scalar amplitude $A_s$, the green shading indicates the region with an experimentally favoured value of the tensor-to-scalar ratio: $r < 0.16$, and red shading indicates the region compatible with the experimental interval for the spectral tilt $n_s$.}$ Show more plots

Corresponding record in: Inspire

Back to search

Record created 2014-12-04, last modified 2023-10-04

Article from SCOAP3: