Energy-energy correlations in e sup + e sup minus annihilation measured at E sub cm = 29 GeV and M sub z

Thesis/Dissertation · Tue Jan 01 04:00:00 EST 1991

OSTI ID:5317812

Yurko, M V.J.

Data has been collected from the continuum at 29 GeV and decays of the Z{sup 0} boson. The Mark II detector, located at the Stanford Linear Collider, has recorded the decays of the Z{sup 0} to quarks and subsequently to hadrons. Furthermore, the Mark II detector previously had been located at PEP where it collected data with a center of mass energy equal to 29 GeV. The purpose of this report is to detail measurements of energy-energy correlations in these decays. Measures of energy-energy correlations at the two different energies have led to two measures for the strong coupling constant of the Quantum Field Theory (QFT) known as Quantum Chromodynamics (QCD). The relevant aspects of the theory are presented. The many subsystems of the detector are discussed in a modicum of detail. Studies of the three and four jet natures of these events are made. The connection of the underlying parton model's prediction of quark and gluon intermediate states is incorporated in measuring the strong coupling constant. Theoretical predictions for the energy-energy correlation with predictions to second order in the strong coupling constant are used to determine values of the strong coupling. The results are for the strong coupling constant, {alpha}{sub s}, are {alpha}{sub s}(29 GeV) = 0.161 {plus minus} 0.0004 (exp.) {plus minus} 0.010 (syst.) and {alpha}{sub s}(M{sub Z}) = 0.12 {plus minus} 0.01(exp.) {plus minus} 0.009(syst.).

• Research Organization: Indiana Univ., Bloomington, IN (United States)
• OSTI ID: 5317812
• Country of Publication: United States
• Language: English

Related Subjects

662230 -- Quantum Chromodynamics-- (1992-)
662310* -- Weak & Electromagnetic Interactions of Leptons-- (1992-)
662380 -- Decays of Intermediate Bosons-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCELERATOR FACILITIES
ACCELERATORS
ANNIHILATION
BASIC INTERACTIONS
BOSONS
CORRELATIONS
COUPLING CONSTANTS
DECAY
ELECTROMAGNETIC INTERACTIONS
ELECTRON-POSITRON INTERACTIONS
ELEMENTARY PARTICLES
ENERGY
ENERGY RANGE
FERMIONS
FIELD THEORIES
GEV RANGE
GEV RANGE 10-100
INTERACTIONS
INTERMEDIATE BOSONS
INTERMEDIATE VECTOR BOSONS
JET MODEL
LEPTON-LEPTON INTERACTIONS
LINEAR ACCELERATORS
MATHEMATICAL MODELS
PARTICLE DECAY
PARTICLE INTERACTIONS
PARTICLE MODELS
POSTULATED PARTICLES
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
QUARKS
STANFORD LINEAR COLLIDER
STRONG INTERACTIONS
Z NEUTRAL BOSONS