Supersymmetric Majoron inflation

Abstract

We propose supersymmetric Majoron inflation in which the Majoron field Φ responsible for generating right-handed neutrino masses may also be suitable for giving low scale "hilltop" inflation, with a discrete lepton number Z N spontaneously broken at the end of inflation, while avoiding the domain wall problem. In the framework of nonminimal supergravity, we show that a successful spectral index can result with small running together with small tensor modes. We show that a range of heaviest right-handed neutrino masses can be generated, m N ∼ 10 1 − 10 16 GeV, consistent with the constraints from reheating and domain walls.

QCD axion window and low-scale inflation

“…The inflaton can be identified with the B-L Higgs field. See Refs [47,49,50]. for detailed studies of such inflation model.…”

QCD axion window and false vacuum Higgs inflation

“…[128][129][130]. The inflaton ϕ may be identified with the B−L Higgs [51,[131][132][133][134] or an axion-like particle [47,135,136]. As we shall see shortly, λ ϕ is much smaller than unity.…”

The inflaton portal to dark matter

“…In this paper we would like to question the possibility that the inflationary sector provides a natural portal between the dark and the visible sectors without such non minimal coupling. We will for this follow as an illustrative example the steps of [42,43] in which dark matter is encapsulated together with the inflaton in a single complex field and interacts with the standard model through a portal interaction and show that constraints coming from both aspects of cosmology can be intimately related.…”

“…Similarly to [42,43] is invariant under a global U(1) which is broken during inflation, whose pseudo-goldstone boson is assumed to be the dark constituent of our Universe. As setting the energy scale of inflation the inflaton-dark matter coupling to the inflation observables is constrained experimentally by astrophysical measurements.…”