The MSSM without mu term

TL;DR

This paper introduces a supersymmetric extension of the standard model that eliminates the mu parameter by adding new fields and an approximate U(1)_R symmetry, resulting in specific bounds on superpartner masses.

Contribution

It presents a novel MSSM extension without the mu term, incorporating new fields and symmetries to naturally explain mass hierarchies and impose bounds on superpartner masses.

Findings

Upper bounds on superpartner masses, e.g., 114 GeV for the lightest chargino.

The model does not adhere to the MSSM Higgs mass bounds.

Large tan(beta) explained by approximate U(1)_R symmetry.

Abstract

We propose a supersymmetric extension of the standard model which does not have a ``mu'' supersymmetric Higgs mass parameter. The matter content of the MSSM is extended with three additional chiral superfields: one singlet, an SU(2) triplet and a color octet, and an approximate U(1)_R symmetry naturally guarantees that tan(beta) is large, explaining the top/bottom quark mass hierarchy. Unlike in the MSSM, there are significant upper bounds on the masses of superpartners, including an upper bound of 114 GeV on the mass of the lightest chargino. However the MSSM bound on the lightest Higgs mass does not apply.