John Collins JHEP05(2000)004 doi:10.1088/1126-6708/2000/05/004
John Collins1
Show affiliationsIn the case of the gluon-fusion process in deep-inelastic leptoproduction, I explicitly show how to incorporate NLO corrections in a Monte-Carlo event generator by a subtraction method. I calculate the parton densities to be used by the event generator in terms of MSbar densities. The method is generalizable. A particular motivation for treating the gluon-fusion process is to treat diffractive deep-inelastic scattering properly, since in diffractive scattering the gluon density dominates the quark densities. I also propose a modified algorithm for treating parton kinematics in event generators; the new algorithm results in much simpler formulae for the NLO corrections. A disadvantage of the new method is that some of the generated events may have negative weights. However, an adjustable cut-off function is present in the formalism, and this permits a renormalization-group-like transformation that can be used to at least reduce the proportion of events with negative weights.
13.66.De Lepton production in e-e+ interactions
13.60.Hb Total and inclusive cross sections (including deep-inelastic processes)
Issue 05 ( 1 May 2000)
Received 12 January 2000, accepted for publication 2 May 2000
Published 19 May 2000
John Collins JHEP05(2000)004
M Novello JCAP06(2007)018
Ya Zhydachevskii et al 2008 J. Phys.: Condens. Matter 20 095204
Neil D. Lambert and Ivo Sachs JHEP03(2000)028
Adriaan M H van der Veen et al 2007 Metrologia 44 08003
Z L Yuan et al 2009 New J. Phys. 11 045019
Szymon P Malinowski et al 2008 New J. Phys. 10 075020
Allan Adams and Michal Fabinger JHEP04(2002)006
A. A. Abdo et al 2009 ApJ 706 L138
G. B. Brammer et al 2009 ApJ 706 L173