University of Illinois Urbana-Champaign

A Measurement of B Hadron Correlations in Proton-Antiproton Collisions at Center of Mass Energy = 1.8 TeV

Lannon, Kevin Patrick

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Description

Title
A Measurement of B Hadron Correlations in Proton-Antiproton Collisions at Center of Mass Energy = 1.8 TeV
Author(s)
Lannon, Kevin Patrick
Issue Date
2003
Doctoral Committee Chair(s)
  • Steven Errede
  • Kevin Pitts
Department of Study
Physics
Discipline
Physics
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Physics, Elementary Particles and High Energy
Language
eng
Abstract
B hadron correlations provide input into the significance of higher-order bb¯ production mechanisms. We present a study of B hadron correlations in pp¯ collisions at s = 1.8 TeV. Events containing a bb¯ pair are identified by the presence of an energetic electron or muon and both B hadrons in the event are located by reconstructing their decay vertices using precision charged-particle tracking. The transverse opening angle distribution, Delta&phis;, measured in data is compared to prediction from the PYTHIA and HERWIG Monte Carlo programs and found to be qualitatively similar. The closest matching Monte Carlo model is used to extract the B hadron Delta&phis; distribution from the raw tag distribution. For the combined electron and muon sample, 28.8 +/- 1.0 (stat.) +/- 3.1 (syst.)% of B hadron pairs are found to have Delta&phis; < 90°.
Graduation Semester
2003
Type of Resource
text
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http://hdl.handle.net/2142/80495

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