Dijet production in generic contact interaction at linear colliders

TL;DR

This paper investigates how four-fermion contact interactions affect dijet production at electron-positron colliders, showing that QCD corrections are calculable and lead to significant, flavor-dependent deviations from the Standard Model predictions.

Contribution

It demonstrates the feasibility of calculating QCD corrections for nonrenormalizable contact interactions and highlights their substantial impact on observable distributions.

Findings

QCD corrections can be computed for contact interactions.

Corrections significantly differ from Standard Model predictions.

Distinctive flavor dependence in the corrections.

Abstract

We consider dijet production at a $e^+ e^-$ collider in a class of effective theories with the relevant operators being four-fermion contact interaction. Despite the nonrenormalizable nature of the interaction, we explicitly demonstrate that calculating QCD corrections is both possible and meaningful. Calculating the corrections for various differential distributions, we show that these can be substantial and significantly different from those within the SM. Furthermore, the corrections have a very distinctive flavor dependence.