Factorization Approach for Top Mass Reconstruction at High Energies

Details Factorization Approach for Top Mass Reconstruction at High Energies Factorization Approach for Top Mass Reconstruction at High Energies

2007-10-23

arxiv.org/abs/0710.4205v1

ECONF C0705302:LOOP06,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

Talk given at 2007 International Linear Collider Workshop (LCWS07 and ILC07), Hamburg, Germany, 30 May - 3 Jun 2007, 7 pages,

Scientific paper

Using effective theories for jets and heavy quarks it is possible to prove that the double differential top-antitop invariant mass distribution for the process $e^+e^-\to t\bar t$ in the resonance region for c.m. energies $Q$ much larger than the top mass can factorized into perturbatively computable hard coefficients and jet functions and a non-perturbative soft function. For invariant mass prescriptions based on hemispheres defined with respect to the thrust axis the soft function can be extracted from massless jet event shape distributions. This approach allows in principle for top mass determinations without uncertainties from hadronization using the reconstruction method and to quantify the top mass scheme dependence of the measured top quark mass value.

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