Determination of. cap alpha. /sub s/ from energy-energy correlations in e/sup +/e/sup -/ annihilation at 29 GeV

Journal Article · Wed Jun 01 04:00:00 EDT 1988 · Phys. Rev. D; (United States)

DOI:https://doi.org/10.1103/PhysRevD.37.3091· OSTI ID:5263918

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

We have studied the energy-energy correlation in e/sup +/e/sup -/ annihilation into hadrons at ..sqrt..s = 29 GeV using the Mark II detector at the SLAC storage ring PEP. We find to O(..cap alpha../sub s//sup 2/) that ..cap alpha../sub s/ = 0.158 +- 0.003 +- 0.008 if hadronization is described by string fragmentation. Independent fragmentation schemes give ..cap alpha../sub s/ = 0.10--0.14, and give poor agreement with the data. A leading-log shower fragmentation model is found to describe the data well.

• Research Organization: Lawrence Berkeley Laboratory and Department of Physics, University of California, Berkeley, California 94720 Stanford Linear Accelerator Center, Stanford University, Stanford, California 94305 University of California, Santa Cruz, California 95064 University of Michigan, Ann Arbor, Michigan 48109
• OSTI ID: 5263918
• Journal Information: Phys. Rev. D; (United States), Journal Name: Phys. Rev. D; (United States) Vol. 37:11; ISSN PRVDA
• Country of Publication: United States
• Language: English

Related Subjects

645102* -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Weak Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANGULAR CORRELATION
ANNIHILATION
BASIC INTERACTIONS
COMPOSITE MODELS
CORRELATIONS
COUPLING CONSTANTS
DRIFT CHAMBERS
ELECTROMAGNETIC INTERACTIONS
ELECTRON-POSITRON INTERACTIONS
ENERGY RANGE
EXTENDED PARTICLE MODEL
FIELD THEORIES
FRAGMENTATION
GEV RANGE
GEV RANGE 10-100
INTERACTIONS
LEPTON-LEPTON INTERACTIONS
MATHEMATICAL MODELS
MEASURING INSTRUMENTS
MULTIWIRE PROPORTIONAL CHAMBERS
PARTICLE INTERACTIONS
PARTICLE MODELS
PEP STORAGE RINGS
PROPORTIONAL COUNTERS
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
QUARK MODEL
RADIATION DETECTORS
STORAGE RINGS
STRING MODELS