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Correcting the Colour-Dipole Cascade Model with Fixed Order Matrix Elements

Published 7 June 2002 Published under licence by IOP Publishing Ltd
, , Citation Leif Lönnblad JHEP05(2002)046 DOI 10.1088/1126-6708/2002/05/046

1126-6708/2002/05/046

Abstract

An algorithm is presented in which the Colour-Dipole Cascade Model as implemented in the ARIADNE program is corrected to match the fixed order tree-level matrix elements for ee+n jets. The result is a full parton level generator for ee+ annihilation where the generated states are correct on tree-level to fixed order in αs and to all orders with modified leading logarithmic (MLLA) accuracy. In this paper, matrix elements are used up to second order in αs, but the scheme is applicable also for higher orders. A strategy for also including exact virtual corrections to fixed order is suggested and the possibility to extend the scheme to hadronic collisions is discussed.

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10.1088/1126-6708/2002/05/046