Top-quark mass measurement in events with jets and missing transverse energy using the full CDF data set

TL;DR

This paper reports the most precise measurement to date of the top-quark mass using the full CDF dataset, focusing on events with jets and missing energy without detected leptons, employing in situ calibration methods.

Contribution

It introduces a novel analysis of semileptonic top-quark decays without detected leptons, achieving unprecedented precision in top-quark mass measurement.

Findings

Top-quark mass measured as 173.93 GeV/c^2 with 1.64 GeV/c^2 statistical uncertainty.

Utilized in situ jet energy scale calibration for improved accuracy.

Most precise measurement for this event topology to date.

Abstract

We present a measurement of the top-quark mass using the full data set of Tevatron $\sqrt{s} = 1.96$ TeV proton-antiproton collisions recorded by the CDF II detector, corresponding to an integrated luminosity of \invfb{8.7}. The analysis uses events with one semileptonic $t$ or $\bar{t}$ decay, but without detection of the electron or muon. We select events with significant missing transverse energy and multiple jets. We veto events containing identified electrons or muons. We obtain distributions of the top-quark masses and the invariant mass of the two jets from $W$-boson decays from data and compare these to templates derived from signal and background samples to extract the top-quark mass and the energy scale of the calorimeter jets with {\it in situ} calibration. A likelihood fit of the templates from signal and background events to the data yields the top-quark mass, $\mtop = \gevcc{\measStatSyst{173.93}{1.64}{0.87}}$. This result is the most precise measurement to date of the mass of the top quark in this event topology.