A Study of Energy Flow in the Hadronic Final State of Deep Inelastic Neutral Current Scattering Events at HERA

Forbes, Jonathan Robert (1993) A Study of Energy Flow in the Hadronic Final State of Deep Inelastic Neutral Current Scattering Events at HERA. PhD thesis, University of Glasgow.

Abstract

Details of the assembly, wiring and testing of two of the ZEUS transition radiation detectors, TRDl and TRD2 are presented. Following the installation of the chambers into the ZEUS experiment, the experience gained by the author, problems encountered, suggested design modifications and current status are reviewed. A study of the behaviour of the hadronic final state in deep inelastic neutral current scattering events at the HERA collider is presented. The study explores the new kinematic regime in Bjorken 10-4 < x 10 GeV2, various QCD Monte Carlo models are compared to uncorrected and corrected data gathered by the ZEUS Collaboration. The comparison reveals that QCD radiation is an important consideration when predicting final state event characteristics. Both the matrix element approach by itself and the Lund Parton Shower model using a variety of virtuality scales for gluon emission are shown not to reproduce the observed data. The colour dipole model coded in ARIADNE, parton showers matched to matrix elements as performed by LEPTO, and the HERWIG model are shown to give reasonable descriptions of the data.

• Item Type: Thesis (PhD)
• Qualification Level: Doctoral
• Additional Information: Adviser: David Saxon
• Keywords: High energy physics, Theoretical physics
• Date of Award: 1993
• Depositing User: Enlighten Team
• Unique ID: glathesis:1993-76378
• Copyright: Copyright of this thesis is held by the author.
• Date Deposited: 19 Nov 2019 14:57
• Last Modified: 19 Nov 2019 14:57
• URI: https://theses.gla.ac.uk/id/eprint/76378