Renormalization-group improved calculation of top-quark production near threshold

The top-quark cross section close to threshold in e(+)e(-) annihilation is computed including the summation of logarithms of the velocity at next-to-next-to-leading-logarithmic order in QCD. The remaining theoretical uncertainty in the normalization of the total cross section is at the few-percent l...

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Bibliographic Details
Published in:Physical review letters 2001-03, Vol.86 (10), p.1951-1954
Main Authors: Hoang, A H, Manohar, A V, Stewart, I W, Teubner, T
Format: Article
Language:English
Subjects:
ANNIHILATION
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
CROSS SECTIONS
HIGGS BOSONS
NUCLEAR PHYSICS AND RADIATION PHYSICS
PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
PRODUCTION
QUANTUM CHROMODYNAMICS
STANDARD MODEL
TOTAL CROSS SECTIONS
VELOCITY
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Summary:The top-quark cross section close to threshold in e(+)e(-) annihilation is computed including the summation of logarithms of the velocity at next-to-next-to-leading-logarithmic order in QCD. The remaining theoretical uncertainty in the normalization of the total cross section is at the few-percent level, an order of magnitude smaller than in previous next-to-next-to-leading order calculations. This uncertainty is smaller than the effects of a light standard-model Higgs boson.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.86.1951