Remarkable signals of $t_R$ compositeness

TL;DR

This paper investigates distinctive signals of $t_R$ compositeness in top quark production processes, highlighting how high-energy cross sections and asymmetries differ from the Standard Model predictions, offering a new approach to detect compositeness effects.

Contribution

It introduces a method to identify $t_R$ compositeness through high-energy process analysis without requiring polarization measurements, considering $q^2$ dependent form factors and effective top mass effects.

Findings

Significant differences in cross sections and asymmetries at high energies.

Effective $q^2$ dependent top mass influences observables.

Proposes a strategy for experimental analysis of $t_R$ compositeness.

Abstract

We are looking for remarkable differences between predictions of the standard model and those of $t_R$ compositeness (while the $t_L$ remains elementary) in various basic $t\bar t$ production processes, without having to make difficult final polarization analyses. We assume the presence of $q^2$ dependent form factors which first suppress the $t_R$ contributions at high $q^2$, and in addition, may also lead to an effective $q^2$ dependent top mass. We further assume that these effects disappear at low $q^2$ so that there are no anomalous couplings. We show that large specific differences indeed appear in the high energy limits of cross sections and asymmetries in $e^-e^+$, gluon+gluon, $\gamma\gamma$ collisions and other fusion processes and that this should lead to a strategy for analyzing them.