Measuring the top quark mass with m_T2 at the LHC

TL;DR

This paper explores using the collider variable m_T2 to measure the top quark mass at the LHC, demonstrating that it can achieve a precision of about 1 GeV through Monte Carlo simulations of dilepton t-tbar events.

Contribution

It introduces a method to determine the top quark mass solely using the m_T2 variable at the LHC, with detailed Monte Carlo analysis.

Findings

Top quark mass can be measured with approximately 1 GeV precision.

The m_T2 variable is effective for top mass measurement in dilepton decay channels.

Monte Carlo simulations support the viability of this method.

Abstract

We investigate the possibility to measure the top quark mass using the collider variable $m_{T2}$ at the LHC experiment. Monte Carlo studies of $m_{T2}$ are performed with the events corresponding to the dilepton decays of $t\bar{t}$ produced at the LHC with 10 $fb^{-1}$ integrated luminosity. Our analysis suggests that the top quark mass can be determined by the $m_{T2}$ variable alone with a good precision at the level of 1 GeV.