QCD studies in ep collisions

Conference · Sun Jun 01 04:00:00 EDT 1997

OSTI ID:330644

Smith, W H ^[1]

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1. Univ. of Wisconsin, Madison, WI (United States). Physics Dept.

These lectures describe QCD physics studies over the period 1992--1996 from data taken with collisions of 27 GeV electrons and positrons with 820 GeV protons at the HERA collider at DESY by the two general-purpose detectors H1 and ZEUS. The focus of these lectures is on structure functions and jet production in deep inelastic scattering, photoproduction, and diffraction. The topics covered start with a general introduction to HERA and ep scattering. Structure functions are discussed. This includes the parton model, scaling violation, and the extraction of F{sub 2}, which is used to determine the gluon momentum distribution. Both low and high Q{sup 2} regimes are discussed. The low Q{sup 2} transition from perturbative QCD to soft hadronic physics is examined. Jet production in deep inelastic scattering to measure {alpha}{sub s}, and in photoproduction to study resolved and direct photoproduction, is also presented. This is followed by a discussion of diffraction that begins with a general introduction to diffraction in hadronic collisions and its relation to ep collisions, and moves on to deep inelastic scattering, where the structure of diffractive exchange is studied, and in photoproduction, where dijet production provides insights into the structure of the Pomeron. 95 refs., 39 figs.

• Research Organization: Stanford Univ., Stanford Linear Accelerator Center, CA (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: FG02-95ER40896
• OSTI ID: 330644
• Report Number(s): SLAC-R--508; CONF-9608101--PROC.; ON: DE98059286
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
COUPLING CONSTANTS
DEEP INELASTIC SCATTERING
ELECTRON-POSITRON INTERACTIONS
HADRONS
PARTICLE PRODUCTION
PERTURBATION THEORY
QUANTUM CHROMODYNAMICS
STRUCTURE FUNCTIONS