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Related Experiment Video

Updated: May 17, 2026

Setting Limits on Supersymmetry Using Simplified Models

Setting Limits on Supersymmetry Using Simplified Models

Published on: November 15, 2013

Precision top-quark mass measurement at CDF.

T Aaltonen¹, B Alvarez González, S Amerio

¹Division of High Energy Physics, Department of Physics, University of Helsinki, Helsinki, Finland.

Physical Review Letters

|October 30, 2012

Summary

This summary is machine-generated.

This study reports the most precise measurement of the top-quark mass at 172.85 ± 0.98 GeV/c². The analysis utilized the full Tevatron dataset from the CDF II detector in proton-antiproton collisions.

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Area of Science:

High Energy Physics
Particle Physics
Collider Physics

Background:

The top quark is the heaviest known elementary particle.
Precise measurements of the top-quark mass are crucial for understanding the Standard Model of particle physics and searching for new physics.
Previous measurements have established its mass but with room for improved precision.

Purpose of the Study:

To perform a precision measurement of the top-quark mass.
To leverage the full dataset collected by the CDF II detector at the Tevatron.
To achieve the single most precise determination of the top-quark mass to date.

Main Methods:

Analysis of tt¯ candidate events in the lepton+jets decay channel.
Utilizing a full sample of Tevatron proton-antiproton collisions (8.7 fb⁻¹).
Employing template-based likelihood fits with in situ jet energy scale calibration.

Main Results:

The top-quark mass was measured to be M(top) = 172.85 ± 0.71 (stat) ± 0.85 (syst) GeV/c².
This result represents the single most precise measurement of the top-quark mass.
The analysis included a detailed study of signal and background event distributions.

Conclusions:

The achieved precision advances our understanding of the top quark's properties.
This measurement provides a stringent test of the Standard Model.
Further studies can build upon this precise value for future theoretical and experimental investigations.