Work

Differential distributions for single top quark production at the LHeC

Year: 2021

Type: article

Abstract: We present a phenomenological study of the single top (anti)quark production with leptonic decays at the Large Hadron Electron Collider at next-to-leading order (NLO) in QCD. We focus on various differential distributions in a fiducial region. The NLO corrections can reduce the fiducial cross section by 14%. We find that the NLO predictions exhibit strong stability under scale variations for most observables considered, while the scale variations at leading order dominate in the theoretical uncertainties. We propose a method of determining the top quark mass using the measurement of the average transverse momentum of the charged lepton. The scale variations at the NLO induce a theoretical uncertainty of about 1.3 GeV of the extracted top quark mass. The statistical error of the extracted top quark mass amounts to 1.1 GeV. We also investigate the impact of the QCD corrections and the scale variations in searches for the anomalous $Wtb$ couplings.

Source: Physical review. D/Physical review. D.

DOI: 10.1103/physrevd.104.053005

Authors: Meisen Gao, Jun Gao

Institutions: Shanghai Jiao Tong University, Shanghai Key Laboratory for Particle Physics and Cosmology, Peking University

Language: English

Topic: Particle physics theoretical and experimental studies

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Funder: National Natural Science Foundation of China

Awards: G1543536403, G5185192410