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Sep 27 – 30, 2016
DESY Hamburg
Europe/Berlin timezone

Structure of Kaehler potential for D-term inflationary attractor models

Sep 29, 2016, 4:50 PM
15m
Seminar room 2 (DESY Hamburg)

Seminar room 2

DESY Hamburg

Notkestrasse 85, 22607 Hamburg
Cosmology & Astroparticle Physics Parallel Session: Cosmology & Astroparticle Physics

Speaker

Ken'ichi Saikawa (DESY)

Description

Minimal chaotic models of D-term inflation predicts too large primordial tensor perturbations. Although it can be made consistent with observations utilizing higher order terms in the Kaehler potential, expansion is not controlled in the absence of symmetries. We comprehensively study the conditions of Kaehler potential for D-term plateau-type potentials and discuss its symmetry. They include the alpha-attractor model with a massive vector supermultiplet and its generalization leading to pole inflation of arbitrary order. We extend the models so that it can describe Coulomb phase, gauge anomaly is cancelled, and fields other than inflaton are stabilized during inflation. We also point out a generic issue for large-field D-term inflation that the masses of the non-inflaton fields tend to exceed the Planck scale.

Primary authors

Kazunori Nakayama (The University of Tokyo) Ken'ichi Saikawa (DESY) Masahide Yamaguchi (Tokyo Institute of Technology) Takahiro Terada (Asia Pacific Center for Theoretical Physics)

Presentation materials