Measurement of differential cross-sections of a single top quark produced in association with a $W$ boson at $\sqrt{s}=13$ TeV with ATLAS

TL;DR

This paper reports the measurement of differential cross-sections for single top quark production with a W boson at 13 TeV using ATLAS data, providing detailed insights into particle interactions and validating theoretical models.

Contribution

First measurement of differential cross-sections for single top quark plus W boson production at 13 TeV with detailed particle-level observables.

Findings

Results agree with Monte Carlo predictions

Differential cross-sections are measured in a well-defined fiducial phase space

Data collected from 36.1 fb$^{-1}$ of LHC collisions

Abstract

The differential cross-section for the production of a $W$ boson in association with a top quark is measured for several particle-level observables. The measurements are performed using 36.1 fb$^{-1}$ of $pp$ collision data collected with the ATLAS detector at the LHC in 2015 and 2016. Differential cross-sections are measured in a fiducial phase space defined by the presence of two charged leptons and exactly one jet matched to a $b$-hadron, and are normalised with the fiducial cross-section. Results are found to be in good agreement with predictions from several Monte Carlo event generators.