Using Drell-Yan to probe the underlying event in Run II at Collider Detector at Fermilab (CDF)

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We study the behavior of charged particles produced in association with Drell-Yan lepton-pairs in the region of the Z-boson in proton-antiproton collisions at 1.96 TeV. We use the direction of the Z-boson in each event to define 'toward', 'away', and 'transverse' regions. For Drell-Yan production (excluding the leptons) both the 'toward' and 'transverse' regions are very sensitive to the 'underlying event', which is defined as everything except the two hard scattered components. The data are corrected to the particle level and are then compared with several PYTHIA models (with multiple parton interactions) and HERWIG (without multiple parton interactions) at the ... continued below

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128 pages

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Kar, Deepak & U., /Florida December 1, 2008.

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Description

We study the behavior of charged particles produced in association with Drell-Yan lepton-pairs in the region of the Z-boson in proton-antiproton collisions at 1.96 TeV. We use the direction of the Z-boson in each event to define 'toward', 'away', and 'transverse' regions. For Drell-Yan production (excluding the leptons) both the 'toward' and 'transverse' regions are very sensitive to the 'underlying event', which is defined as everything except the two hard scattered components. The data are corrected to the particle level and are then compared with several PYTHIA models (with multiple parton interactions) and HERWIG (without multiple parton interactions) at the particle level (i.e. generator level). The data are also compared with a previous analysis on the behavior of the 'underlying event' in high transverse momentum jet production. The goal is to produce data that can be used by the theorists to tune and improve the QCD Monte-Carlo models of the 'underlying event' that are used to simulate hadron-hadron collisions.

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128 pages

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  • Report No.: FERMILAB-THESIS-2008-54
  • Grant Number: AC02-07CH11359
  • DOI: 10.2172/944231 | External Link
  • Office of Scientific & Technical Information Report Number: 944231
  • Archival Resource Key: ark:/67531/metadc899866

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  • December 1, 2008

Added to The UNT Digital Library

  • Sept. 27, 2016, 1:39 a.m.

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  • Dec. 2, 2016, 5:58 p.m.

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Kar, Deepak & U., /Florida. Using Drell-Yan to probe the underlying event in Run II at Collider Detector at Fermilab (CDF), thesis or dissertation, December 1, 2008; Batavia, Illinois. (digital.library.unt.edu/ark:/67531/metadc899866/: accessed September 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.