Hard underlying event correction to inclusive jet cross sections

Details Hard underlying event correction to inclusive jet cross sections Hard underlying event correction to inclusive jet cross sections

1997-08-26

arxiv.org/abs/hep-ph/9708464v1

Phys.Rev. D57 (1998) 5787-5792

Physics

High Energy Physics

High Energy Physics - Phenomenology

19 pages, revtex, 8 PostScript figures

Scientific paper

10.1103/PhysRevD.57.5787

Jets observed in hadron-hadron scattering contain a contribution from the underlying event that is produced by spectator interactions taking place incoherently with the major parton-parton collision, due to the extended composite structure of the colliding hadrons. Using a recent measurement of the double parton interaction rate, we calculate that the underlying event may be 2 - 3 times stronger than generally assumed, as a result of semi-hard perturbative multiple-parton interactions. This can have an important influence on the inclusive jet cross section at moderate values of E_T, persisting at the 5 - 10% level to the largest observable E_T. We show how the underlying event can be measured accurately using a generalization of the method first proposed by Marchesini and Webber.

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