Top Quark Mass Measurements at CDF

TL;DR

This paper reports recent measurements of the top quark mass at the CDF experiment using various advanced analysis methods on data collected during Run II, achieving consistent results across methods.

Contribution

It introduces and compares three different analysis techniques—Template, Multivariate Template, and Dynamical Likelihood Methods—for measuring the top quark mass.

Findings

All methods produce similar top quark mass results.

The Dynamical Likelihood Method measures the mass as 177.8±4.5/5.0(stat)±6.2(sys) GeV/c^2.

The analyses utilize 162 pb^-1 of data from ppbar collisions at 1.96 TeV.

Abstract

Recent measurements of the mass of the top quark are presented using 162 pb-1 of data of ppbar collisions at sqrt(s)=1.96 TeV collected by the CDF detector at the Tevatron collider during Run II. The analyses focus on the semi-leptonic decay mode with one or two identified bottom quarks. The Template Method reconstructs the invariant mass of the top quark in each event. The Multivariate Template Method enhances this approach by adding information on the event topology. The Dynamical Likelihood Method discriminates between possible mass values using top quark decay observables and attempts to use the maximum amount of information on top quarks provided by the Standard Model. All three methods produce similar results. The Dynamical Likelihood Method yields a top quark mass of 177.8+-4.5/5.0(stat)+-6.2(sys)GeV/c^2.