D-term Enhancement in Spin-1 Top Partner Model

TL;DR

This paper explores how D-term enhancements in a supersymmetric model with a spin-1 top partner can raise the Higgs mass beyond experimental bounds while remaining consistent with electroweak precision tests.

Contribution

It introduces a vector top partner model that utilizes nondecoupling D-terms to address the Higgs mass and electroweak constraints.

Findings

Predicts Higgs mass beyond LEP bounds

Consistent with electroweak precision constraints

Demonstrates D-term enhancement effectiveness

Abstract

Supersymmetric models with extended electroweak gauge groups have the potential to enhance the Higgs quartic interaction through nondecoupling D-terms. We consider the D-term enhancement effect in a vector top partner model, where the quadratic divergence to the Higgs mass from the virtual top quark is canceled by its corresponding spin-1 superpartners. We are going to show that the model can predict a Higgs mass beyond the LEP bound, and is consistent with the precision electroweak constraints.