Exploring color-octet scalar parameter space in minimal $R$-symmetric models

TL;DR

This paper investigates the collider signatures of color-octet scalars in minimal R-symmetric supersymmetric models, highlighting novel decay modes, production mechanisms, and parameter space regions compatible with current collider constraints.

Contribution

It provides a systematic analysis of decay channels and collider phenomenology of sgluons in R-symmetric models, revealing new decay modes and viable parameter space.

Findings

Identifies nonstandard diboson decay channels like gluon-photon.

Finds significant three-body decay branching fractions.

Shows large regions of parameter space evade current LHC constraints.

Abstract

In this work we study the collider phenomenology of color-octet scalars (sgluons) in minimal supersymmetric models endowed with a global continuous $R$ symmetry. We systematically catalog the significant decay channels of scalar and pseudoscalar sgluons and identify novel features that are natural in these models. These include decays in nonstandard diboson channels, such as to a gluon and a photon; three-body decays with considerable branching fractions; and long-lived particles with displaced vertex signatures. We also discuss the single and pair production of these particles and show that they can evade existing constraints from the Large Hadron Collider, to varying extents, in large regions of reasonable parameter space. We find, for instance, that a 725 GeV scalar and a 350 GeV or lighter pseudoscalar can still be accommodated in realistic scenarios.