Effective description of squark interactions

TL;DR

This paper introduces an effective framework for describing squark interactions with charginos and neutralinos, accurately capturing radiative corrections and supersymmetry-breaking effects in decay width calculations.

Contribution

It presents a novel effective description incorporating Yukawa couplings and logarithmic terms, improving the accuracy of squark decay predictions compared to full one-loop computations.

Findings

Effective couplings reproduce radiative-corrected decay widths accurately.

The method captures supersymmetry-breaking effects through logarithmic terms.

Validation across parameter space shows high consistency with full calculations.

Abstract

We propose an effective description of squark interactions with charginos/neutralinos. We recompute the strong corrections to squark partial decay widths, and compare the full one-loop computation with the effective description. The effective description includes the effective Yukawa couplings, and another logarithmic term which encodes the supersymmetry-breaking. The proposed effective couplings reproduce correctly the radiative-corrected partial decay widths of the squark decays into charginos and neutralinos in all relevant regions of the parameter space.