Top Mass Measurements from Jets and the Tevatron Top-Quark Mass

TL;DR

This paper discusses theoretical considerations for top-quark mass measurements from jets, introduces the MSR-mass scheme for improved precision, and explores implications for Tevatron experiments.

Contribution

It introduces the MSR-mass scheme, enabling precise top-mass measurements with reduced perturbative uncertainties and discusses its application to Tevatron data.

Findings

The MSR-mass scheme reduces uncertainties in top-mass extraction.

Theoretical analysis of jet-based top-mass measurements.

Implications for Tevatron top-quark mass determination.

Abstract

Theoretical issues are discussed for the measurement of the top-mass using jets, including perturbative and non-perturbative effects that relate experimental observables to the Lagrangian mass, and appropriate choices for mass schemes. Full account for these issues is given for e+e--> t-tbar using a factorization theorem for event shapes for massive quarks. Implications for the Tevatron top-mass measurement are discussed. A mass-scheme, the "MSR-mass", is introduced which allows for a precise description of observables sensitive to scales R << m, but at the same time does not introduce perturbative matching uncertainties in conversion to the MSbar mass.