Multihadronic events at E/sub c. m. / = 29 GeV and predictions of QCD models from E/sub c. m. / = 29 GeV to E/sub c. m. / = 93 GeV

Journal Article · Fri Jan 01 04:00:00 EST 1988 · Phys. Rev. D; (United States)

DOI:https://doi.org/10.1103/PhysRevD.37.1· OSTI ID:5511708

Petersen, A; Abrams, G; Adolphsen, C E; Akerlof, C; Alexander, J P; Alvarez, M; Amidei, D; Baden, A R; Ballam, J; Barish, B C

Multihadronic e/sup +/e/sup -/ annihilation events at a center-of-mass energy of 29 GeV have been studied with both the original (PEP 5) Mark II and the upgraded Mark II detectors. Detector-corrected distributions from global shape analyses such as aplanarity, Q/sub 2/-Q/sub 1/, sphericity, thrust, minor value, oblateness, and jet masses, and inclusive charged-particle distributions including x, rapidity, p/sub perpendicular/, and particle flow are presented. These distributions are compared with predictions from various multihadron event models which use leading-logarithmic shower evolution or QCD matrix elements at the parton level and string or cluster fragmentation for hadronization. The new generation of parton-shower models gives, on the average, a better description of the data than the previous parton-shower models. The energy behavior of these models is compared to existing e/sup +/e/sup -/ data. The predictions of the models at a center-of-mass energy of 93 GeV, roughly the expected mass of the Z/sup 0/, are also presented.

• Research Organization: Stanford Linear Accelerator Center, Stanford University, Stanford, California 94305
• DOE Contract Number: AC03-81ER40050
• OSTI ID: 5511708
• Journal Information: Phys. Rev. D; (United States), Journal Name: Phys. Rev. D; (United States) Vol. 37:1; ISSN PRVDA
• Country of Publication: United States
• Language: English

Related Subjects

645102* -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Weak Interactions & Properties
645204 -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Strong Interactions & Properties
645400 -- High Energy Physics-- Field Theory
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANNIHILATION
BASIC INTERACTIONS
CLUSTER MODEL
COMPOSITE MODELS
ELECTROMAGNETIC INTERACTIONS
ELECTRON-POSITRON INTERACTIONS
ELEMENTARY PARTICLES
ENERGY DEPENDENCE
ENERGY RANGE
EXTENDED PARTICLE MODEL
FIELD THEORIES
FRAGMENTATION
GEV RANGE
GEV RANGE 10-100
HADRONS
INCLUSIVE INTERACTIONS
INTERACTIONS
JET MODEL
LEPTON-LEPTON INTERACTIONS
MATHEMATICAL MODELS
MATRIX ELEMENTS
MULTIPLE PRODUCTION
NUCLEAR MODELS
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTICLE PRODUCTION
PARTICLE PROPERTIES
PARTICLE RAPIDITY
PARTON MODEL
PEP STORAGE RINGS
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
QUARK MODEL
STORAGE RINGS
STRING MODELS