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Title: Baryon production in e/sup +/e/sup -/ annihilation at. sqrt. s = 29 GeV: Clusters or diquarks

Abstract

We use the time-projection chamber detector to study mechanisms of baryon production in the central rapidity region of jets from e/sup +/e/sup -/ annihilation. On the basis of angular correlations between protons and antiprotons, we exclude the isotropic decay of heavy mesonic clusters as a dominant source of baryons at 95% confidence level. The diquark mechanisms used in string fragmentation models reproduce the data, provided that diquarks are formed in a two-step process which allows mesons to be produced in between the baryon and antibaryon.

Authors:
; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720; University of California, Los Angeles, California 90024; University of California, Riverside, California 92521; Johns Hopkins University, Baltimore, Maryland 21218; University of Massachusetts, Amherst
OSTI Identifier:
5186685
DOE Contract Number:  
AC03-76SF00098; AA03-76SF00034; AC02-76ER03330
Resource Type:
Journal Article
Journal Name:
Phys. Rev. Lett.; (United States)
Additional Journal Information:
Journal Volume: 55:10
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; BARYONS; PAIR PRODUCTION; ELECTRON-POSITRON INTERACTIONS; ANNIHILATION; ANGULAR CORRELATION; FRAGMENTATION; GEV RANGE 10-100; JET MODEL; PARTICLE RAPIDITY; PROJECTION SPARK CHAMBERS; QUANTUM CHROMODYNAMICS; QUARK MODEL; STRING MODELS; BASIC INTERACTIONS; COMPOSITE MODELS; CORRELATIONS; ELECTROMAGNETIC INTERACTIONS; ELEMENTARY PARTICLES; ENERGY RANGE; EXTENDED PARTICLE MODEL; FERMIONS; FIELD THEORIES; GAS TRACK DETECTORS; GEV RANGE; HADRONS; INTERACTIONS; LEPTON-LEPTON INTERACTIONS; MATHEMATICAL MODELS; MEASURING INSTRUMENTS; PARTICLE INTERACTIONS; PARTICLE MODELS; PARTICLE PROPERTIES; QUANTUM FIELD THEORY; RADIATION DETECTORS; SPARK CHAMBERS; 645102* - High Energy Physics- Particle Interactions & Properties-Experimental- Weak Interactions & Properties

Citation Formats

Aihara, H, Alston-Garnjost, M, Bakken, J A, Barbaro-Galtieri, A, Barnes, A V, Barnett, B A, Bengtsson, H, Blumenfeld, B J, Bross, A D, and Buchanan, C D. Baryon production in e/sup +/e/sup -/ annihilation at. sqrt. s = 29 GeV: Clusters or diquarks. United States: N. p., 1985. Web. doi:10.1103/PhysRevLett.55.1047.
Aihara, H, Alston-Garnjost, M, Bakken, J A, Barbaro-Galtieri, A, Barnes, A V, Barnett, B A, Bengtsson, H, Blumenfeld, B J, Bross, A D, & Buchanan, C D. Baryon production in e/sup +/e/sup -/ annihilation at. sqrt. s = 29 GeV: Clusters or diquarks. United States. https://doi.org/10.1103/PhysRevLett.55.1047
Aihara, H, Alston-Garnjost, M, Bakken, J A, Barbaro-Galtieri, A, Barnes, A V, Barnett, B A, Bengtsson, H, Blumenfeld, B J, Bross, A D, and Buchanan, C D. 1985. "Baryon production in e/sup +/e/sup -/ annihilation at. sqrt. s = 29 GeV: Clusters or diquarks". United States. https://doi.org/10.1103/PhysRevLett.55.1047.
@article{osti_5186685,
title = {Baryon production in e/sup +/e/sup -/ annihilation at. sqrt. s = 29 GeV: Clusters or diquarks},
author = {Aihara, H and Alston-Garnjost, M and Bakken, J A and Barbaro-Galtieri, A and Barnes, A V and Barnett, B A and Bengtsson, H and Blumenfeld, B J and Bross, A D and Buchanan, C D},
abstractNote = {We use the time-projection chamber detector to study mechanisms of baryon production in the central rapidity region of jets from e/sup +/e/sup -/ annihilation. On the basis of angular correlations between protons and antiprotons, we exclude the isotropic decay of heavy mesonic clusters as a dominant source of baryons at 95% confidence level. The diquark mechanisms used in string fragmentation models reproduce the data, provided that diquarks are formed in a two-step process which allows mesons to be produced in between the baryon and antibaryon.},
doi = {10.1103/PhysRevLett.55.1047},
url = {https://www.osti.gov/biblio/5186685}, journal = {Phys. Rev. Lett.; (United States)},
number = ,
volume = 55:10,
place = {United States},
year = {Mon Sep 02 00:00:00 EDT 1985},
month = {Mon Sep 02 00:00:00 EDT 1985}
}