We consider the triple differential distribution dΓ/dEJdmJ²dΩJ for two-jet events at center of mass energy M, smeared over the end-point region mJ²M², |2EJ-M|~Δ, ΛQCDΔM. The leading nonperturbative correction, suppressed by ΛQCD/Δ, is given by the matrix element of a single operator. A similar analysis is performed for three-jet events, and the generalization to any number of jets is discussed. At order ΛQCD/Δ, nonperturbative effects in four or more jet events are completely determined in terms of two matrix elements which can be measured in two- and three-jet events.
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Bauer et al. (2003) studied this question.
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