Four-fermion production near the W-pair production threshold
Abstract
I report on recent results for the total production cross section of the process e- e+ -> mu- nubarmu u dbar X near the W-pair production threshold up to next-to-leading order in GammaW/MW alpha v2 obtained in the framework of unstable-particle effective field theory. Remaining theoretical uncertainties and their impact on the experimental determination of the W mass are discussed.
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