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

Understand

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 &#34;MSR-mass&#34;, 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.