Exploring the phenomenology of weak adjoint scalars in minimal $R$-symmetric models

TL;DR

This paper investigates the properties, interactions, and collider signatures of weak adjoint scalar particles in minimal R-symmetric models, highlighting their potential to evade current experimental constraints.

Contribution

It provides a detailed analysis of the phenomenology of 'swino' and 'sbino' scalars, including decay widths, mass spectrum effects, and collider signatures, in minimal R-symmetric models.

Findings

Large parameter regions remain unconstrained by current colliders.

Decay widths of scalars are computed analytically to one loop.

Production and decay signatures are characterized for benchmark scenarios.

Abstract

We examine the phenomenology of the scalar fields in weak and Higgs sectors of minimal $R$-symmetric models, in particular the 'swino' and 'sbino', the scalar partners to the chiral fields that marry the electroweak gauge bosons in Dirac gaugino models. These fields are in adjoint representations of $SU(2)$ and $U(1)$ and have both $CP$-even and $CP$-odd components. The interactions of these new states are summarized, and decay widths are computed analytically to one loop order. We discuss the tree level contributions of these new states to the mass spectrum of MSSM sfermions. We also explore production cross sections and decay signatures at colliders for several chosen benchmarks. We find that large regions of parameter space are unconstrained by present collider data.