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QCD matrix elements + parton showers.

Catani, S. and Krauss, F. and Webber, B. R. and Kuhn, R. (2001) 'QCD matrix elements + parton showers.', Journal of high energy physics., 2001 (11). 063.


We propose a method for combining QCD matrix elements and parton showers in Monte Carlo simulations of hadronic final states in e+e− annihilation. The matrix element and parton shower domains are separated at some value yini of the jet resolution, defined according to the kT-clustering algorithm. The matrix elements are modified by Sudakov form factors and the parton showers are subjected to a veto procedure to cancel dependence on yini to next-to-leading logarithmic accuracy. The method provides a leading-order description of hard multi-jet configurations together with jet fragmentation, while avoiding the most serious problems of double counting. We present first results of an approximate implementation using the event generator APACIC++.

Item Type:Article
Keywords:LEP HERA, SLC Physics, QCD, Jets.
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Record Created:16 Jul 2007
Last Modified:17 Jun 2015 09:46

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