Structure of K\"ahler potential for D-term inflationary attractor models

Understand

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 K\"ahler potential, expansion is not controlled in the absence of symmetries.
• We comprehensively study the conditions of K\"ahler 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.