Top-quark mass determination from t-channel single top production at the LHC

We study the determination of the top-quark mass using leptonic observables in t-channel single top-quark production at the LHC. We demonstrate sensitivity of transverse momentum of the charged lepton on the input top-quark mass. We present predictions at next-to-next-to-leading order (NNLO) in QCD with narrow width approximation and structure function approach. Further corrections due to parton shower and hadronization, non-resonant and non-factorized contributions are discussed. To reduce impact of SM backgrounds we propose to use the charge weighted distribution for the measurement, i.e., differences between distributions of charged lepton with positive and negative charges. By modeling both signal and background processes, we found the projections for (HL-)LHC to be promising, with a total theoretical uncertainty on the extracted top-quark mass of about 1 similar to 2 GeV.

Automated summary

The study focuses on determining the top-quark mass using leptonic observables in t-channel single top-quark production at the LHC, showcasing the sensitivity of transverse momentum of the charged lepton on the input top-quark mass. Predictions at NNLO in QCD with different corrections are presented, along with proposals to reduce SM backgrounds using charge weighted distributions for measurement. Projections for (HL-)LHC show promising results with a theoretical uncertainty of about 1 to 2 GeV on the extracted top-quark mass.