Top mass determination in leptonic final states with J/psi

TL;DR

This paper proposes a method to measure the top quark mass at the LHC using leptonic final states with J/psi, focusing on systematic uncertainties and Monte Carlo modeling.

Contribution

It introduces a novel approach combining leptonic and J/psi signals for top mass measurement, emphasizing systematic uncertainties and theoretical modeling.

Findings

Systematic error estimated to be less than 1 GeV.

Method relies heavily on accurate Monte Carlo simulations.

Potential for precise top mass determination at the LHC.

Abstract

Taking advantage of large top production rates at the LHC, the leptonic final states with J/psi are explored for a precise determination of the top quark mass. The top is partially reconstructed by combining the isolated lepton from the W with the J/psi from the decays of the corresponding b-quark. The method relies, to a large extent, on the proper Monte-Carlo description of top production and decay. The main emphasis is put on the expected systematics uncertainties. Mass measurement accuracy is dominated by the current understanding of theoretical uncertainties which result in a systematic error of <~1 GeV.