Enhanced nonperturbative effects in jet distributions

Details Enhanced nonperturbative effects in jet distributions Enhanced nonperturbative effects in jet distributions

2002-12-18

arxiv.org/abs/hep-ph/0212255v2

Phys.Rev.Lett. 91 (2003) 122001

Physics

High Energy Physics

High Energy Physics - Phenomenology

Significant changes made. The first moment does not vanish--the paper has been modified to reflect this. Relations between dif

Scientific paper

10.1103/PhysRevLett.91.122001

We consider the triple differential distribution d\Gamma/(dE_J)(dm_J^2)(d\Omega_J) for two-jet events at center of mass energy M, smeared over the endpoint region m_J^2 << M^2, |2 E_J -M| ~ \Delta, \lqcd << \Delta << M. The leading nonperturbative correction, suppressed by \lqcd/\Delta, 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 \lqcd/\Delta, non-perturbative 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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