Importance of fermion loops $W^+W^-$ in elastic scattering

TL;DR

This paper investigates the significance of fermion-loop corrections in high-energy $W^+W^-$ scattering, revealing they can be as important as boson-loop corrections when Standard Model couplings deviate, emphasizing the need to consider both.

Contribution

It demonstrates that fermion-loop corrections are non-negligible in certain parameter regions, challenging the assumption that they can be ignored in high-energy $W^+W^-$ scattering analyses.

Findings

Fermion-loop corrections can surpass boson-loop corrections under certain conditions.

Deviations from Standard Model couplings increase the importance of fermion loops.

Both fermion and boson loops should be included for accurate scattering predictions.

Abstract

We test the assumption that fermion-loop corrections to high energy $W^+W^-$ scattering are negligible when compared to the boson-loop ones. Indeed, we find that, if the couplings of the interactions deviate from their Standard Model values, fermion-loop corrections can in fact become as important or even greater than boson-loop corrections for some particular regions of the parameter space, and both types of loops should be taken into account. Some preliminary results are shown.