Cross Section Constrained Top Quark Mass Measurement from Dilepton Events at the Tevatron

TL;DR

This paper presents a novel top quark mass measurement method that incorporates a cross section constraint, improving precision using dilepton events from the Tevatron with the CDF II detector.

Contribution

It introduces the first top quark mass measurement utilizing a cross section constraint to enhance accuracy in dilepton events.

Findings

Measured top quark mass: 170.7 GeV/c^2 with uncertainties.

Without the cross section constraint, mass is 169.7 GeV/c^2.

Demonstrated improved precision over previous methods.

Abstract

We report the first top quark mass measurement that uses a cross section constraint to improve the mass determination. This measurement is made with a dilepton $t\bar{t}$ event sample collected with the CDF II detector. From a data sample corresponding to an integrated luminosity of 1.2 fb$^{-1}$, we measure a top quark mass of $\rm{170.7^{+4.2}_{-3.9}(stat)\pm2.6(syst)}$ $\rm{\pm2.4(theory) GeV/{\it{c}}^{2}}$. The measurement without the cross section constraint results in a top quark mass of $\rm{169.7^{+5.2}_{-4.9}(stat)\pm3.1(syst) GeV/{\it{c}}^{2}}$.