Photon radiation effects in kinematic reconstruction of top quarks

TL;DR

This paper develops an improved method for reconstructing top quark kinematics that accounts for photon radiation effects, enhancing the accuracy of measurements in top quark events.

Contribution

It introduces a novel reconstruction technique that mitigates photon radiation effects in top quark kinematic analysis for both pair and single production.

Findings

Enhanced accuracy in top quark kinematic measurements

Reduced systematic uncertainties from photon radiation

Applicable to both top pair and single top production processes

Abstract

Kinematic reconstruction of top quarks allows to define a set of kinematic observables relevant to various physics processes that involve top quarks and provides an additional handle for the suppression of background events. Radiation of photons in association with the top quarks alters the kinematics and the topology of the event, leading to visible systematic effects in measurable observables. The present study introduces an improved reconstruction of the top quark kinematics in the presence of photon radiation. The results are presented for processes with top quark pair production, as well as for singly-produced top quarks.