On the On-Shell Renormalization of the Chargino and Neutralino Masses in the MSSM

TL;DR

This paper analyzes the on-shell renormalization scheme for chargino and neutralino masses in the MSSM, recommending specific input states for stability and minimal corrections in theoretical calculations.

Contribution

It proposes an optimal set of input parameters for the on-shell renormalization of chargino and neutralino masses in the MSSM, improving stability and accuracy.

Findings

Using bino-, wino-, and higgsino-like states as inputs reduces large corrections.

Schemes with neutralino higgsino-like inputs are more stable.

The most stable scheme involves wino-like chargino and bino- and higgsino-like neutralinos.

Abstract

We discuss the choice of input parameters for the renormalization of the chargino and neutralino sector in the minimal supersymmetric standard model (MSSM) in the on-shell scheme. We show that one should chose the masses of a bino-like, a wino-like and a higgsino-like state as inputs in order to avoid large corrections to the masses of the other eigenstates in this sector. We also show that schemes where the higgsino-like input state is a neutralino are more stable than those where the mass of the higgsino-like chargino is used as input. The most stable scheme uses the masses of the wino-like chargino as well as the masses of the bino- and higgsino-like neutralinos as inputs.