The underlying event in hard scattering processes

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The authors study the behavior of the underlying event in hard scattering proton-antiproton collisions at 1.8 TeV and compare with the QCD Monte-Carlo models. The underlying event is everything except the two outgoing hard scattered jets and receives contributions from the beam-beam remnants plus initial and final-state radiation. The data indicate that neither ISAJET or HERWIG produce enough charged particles (with p{sub T} > 0.5 GeV/c) from the beam-beam remnant component and that ISAJET produces too many charged particles from initial-state radiation. PYTHIA which uses multiple parton scattering to enhance the underlying event does the best job describing the data.

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413 pages

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Field, R. February 8, 2002.

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Description

The authors study the behavior of the underlying event in hard scattering proton-antiproton collisions at 1.8 TeV and compare with the QCD Monte-Carlo models. The underlying event is everything except the two outgoing hard scattered jets and receives contributions from the beam-beam remnants plus initial and final-state radiation. The data indicate that neither ISAJET or HERWIG produce enough charged particles (with p{sub T} > 0.5 GeV/c) from the beam-beam remnant component and that ISAJET produces too many charged particles from initial-state radiation. PYTHIA which uses multiple parton scattering to enhance the underlying event does the best job describing the data.

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413 pages

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  • APS/DPF/DPB Summer Study on The Future of Particle Physics (Snowmass 2001), Snowmass, CO (US), 06/30/2001--07/21/2001

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  • Report No.: FERMILAB-Conf-02/009-E
  • Grant Number: AC02-76CH03000
  • Office of Scientific & Technical Information Report Number: 791422
  • Archival Resource Key: ark:/67531/metadc741934

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  • February 8, 2002

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  • Oct. 19, 2015, 7:39 p.m.

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  • April 1, 2016, 5:10 p.m.

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Field, R. The underlying event in hard scattering processes, article, February 8, 2002; Batavia, Illinois. (digital.library.unt.edu/ark:/67531/metadc741934/: accessed August 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.