Hard underlying event correction to inclusive jet cross sections

Abstract

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.

19 pages, revtex, 8 PostScript figures

References in corpus (4)

• Jet Shapes in Hadron Collisions: Higher Orders, Resummation and Hadronization
• Towards an unified picture of constituent and current quarks
• Jet Investigations Using the Radial Moment
• Jet Observables in Theory and Reality

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• Measurement of distributions sensitive to the underlying event in inclusive Z-boson production in $pp$ collisions at $\sqrt{s}=7$ TeV with the ATLAS detector
• Energy Flow in Interjet Radiation
• Measurement of charged-particle distributions sensitive to the underlying event in $\sqrt{s}=13$ TeV proton-proton collisions with the ATLAS detector at the LHC
• A Study of the Energy Dependence of the Underlying Event in Proton-Antiproton Collisions
• Measurement of the underlying event in jet events from 7 TeV proton-proton collisions with the ATLAS detector
• Underlying event sensitive observables in Drell-Yan production using GENEVA
• Measurement of the underlying event activity using charged-particle jets in proton-proton collisions at sqrt(s) = 2.76 TeV
• Disentangling the hard gluon Bremsstrahlung effects from the relative transverse activity classifier in pp collisions
• Measurement of distributions sensitive to the underlying event in inclusive $Z$-boson production in pp collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Probing underlying event in Z-boson events using event shape observables