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

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.

Comments: 7 pages, proceedings for the International Workshop on Top Quark Physics, and the 2nd Workshop on Theory, Phenomenology and Experiment in Heavy Flavor Physics, 2008. v2: reference added, language in section 5 improved