Search for anomalous top quark couplings with the D0 detector

TL;DR

This paper investigates potential deviations in top quark interactions by analyzing decay product correlations and production rates, setting limits on anomalous couplings using data from the D0 detector.

Contribution

It combines W boson helicity measurements and single top production data to constrain anomalous top quark couplings for the first time with this dataset.

Findings

Limits on right-handed vector couplings established

Constraints on left- and right-handed tensor couplings obtained

Analysis based on approximately 1fb^-1 of D0 data

Abstract

Anomalous Wtb couplings modify the angular correlations of the top quark decay products and change the single top quark production cross section. We present limits on anomalous top quark couplings by combining information from W boson helicity measurements in top quark decays and anomalous coupling searches in the single top quark final state. We set limits on right-handed vector couplings as well as left-handed and right-handed tensor couplings based on about 1fb^-1 of data collected by the D0 experiment.