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$R$-Symmetry Breaking in Supersymmetric Hybrid Inflation | Matthew Civiletti
; Mansoor Ur Rehman
; Eric Sabo
; Qaisar Shafi
; Joshua Wickman
; | Date: |
14 Mar 2013 | Abstract: | We consider a supersymmetric hybrid inflation scenario in which the U(1)
$R$-symmetry is explicitly broken by Planck scale suppressed operators in the
superpotential. We provide an example with minimal K"ahler potential, with the
$R$-symmetry breaking term relevant during inflation being $alpha S^4$, where
$S$ denotes the well-known gauge singlet inflaton superfield. The inflationary
potential takes into account the radiative and supergravity corrections, as
well as the soft supersymmetry breaking terms. For successful inflation, with
the scalar spectral index in the currently preferred range, $n_s approx 0.97
pm 0.010$, $| alpha |$ $lesssim 10^{-7}$. The tensor to scalar ratio $r
lesssim 10^{-4}$, while $| ext{d} n_s / ext{d} ln k | sim
mathcal{O}(10^{-3})-mathcal{O}(10^{-4})$ | Source: | arXiv, 1303.3602 | Services: | Forum | Review | PDF | Favorites |
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