Chaotic Hybrid Inflation with a Gauged B - L

TL;DR

This paper introduces a new supergravity-based chaotic hybrid inflation model featuring a gauged B-L symmetry that spontaneously breaks at a GUT scale, compatible with current cosmological observations.

Contribution

It presents a novel formulation of chaotic hybrid inflation incorporating a waterfall field that breaks a gauged B-L symmetry at GUT scale, enabling future baryogenesis models.

Findings

Model aligns with Planck, WMAP, and Bicep2 data.

Includes a waterfall field that breaks B-L symmetry.

Potential for baryogenesis via leptogenesis.

Abstract

In this paper we present a novel formulation of chaotic hybrid inflation in supergravity. The model includes a waterfall field which spontaneously breaks a gauged $U_1(B-L)$ at a GUT scale. This allows for the possibility of future model building which includes the standard formulation of baryogenesis via leptogenesis with the waterfall field decaying into right-handed neutrinos. We have not considered the following issues in this short paper, i.e. supersymmetry breaking, dark matter or the gravitino or moduli problems. Our focus is on showing the compatibility of the present model with Planck, WMAP and Bicep2 data.