New method for precise determination of top quark mass at LHC

TL;DR

This paper introduces a new, boost-invariant method using lepton energy distribution to measure the top quark mass at the LHC, aiming for sub-1 GeV precision and addressing theoretical ambiguities.

Contribution

The paper proposes a novel measurement technique that is boost-invariant and can determine well-defined top quark masses, such as the MSbar mass, with high precision.

Findings

Simulation analysis shows potential for sub-1 GeV precision

Method is boost-invariant and uses lepton energy distribution

Further improvements could enhance measurement accuracy

Abstract

Current measurements of the top quark mass which have achieved a precision of less than 1 GeV involve a theoretical problem that the definition of the measured mass is ambiguous in perturbation theory. As a possible solution to the problem, we present a new method to measure the top quark mass at the LHC. This method uses lepton energy distribution and has a boost-invariant nature. We discuss strategies towards a precise determination of theoretically well-defined top quark masses such as the MSbar mass with the method. As a first step in this direction, a simulation analysis at the leading order is performed considering actual experimental circumstances. The result indicates that this method with further improvements is capable of realizing a precision of less than 1 GeV at the LHC.