Bose-Einstein correlations in e/sup +/e/sup -/ collisions

Journal Article · Sun Jan 01 04:00:00 EST 1989 · Phys. Rev. D; (United States)

DOI:https://doi.org/10.1103/PhysRevD.39.1· OSTI ID:6551094

Juricic, I; Goldhaber, G; Gidal, G; Abrams, G; Amidei, D; Baden, A R; Boyer, J; Butler, F; Carithers, W C; Gold, M S; others, and

Four data sets collected with the Mark II detector during its operation at the SPEAR and PEP e/sup +/e/sup -/ storage rings at SLAC are used to study the Bose-Einstein correlation between pairs and triplets of like-sign charged pions. The data sets represent four different regions of energy available for hadron production: the J/psi at ..sqrt..s = 3.095 GeV, typical hadronic energy of approx. =5 GeV in two-photon events, and annihilation in the energy regions ..sqrt..s = 4--7 GeV above the J/psi, and ..sqrt..s = 29 GeV. The Bose-Einstein correlation is studied as a function of Q/sup 2/, the four-momentum difference squared of the pair, and of Q/sub 3//sup 2/, an analogous quantity defined for triplets. After corrections for Coulomb effects and pion misidentification, pair analyses indicate a nearly full Bose-Einstein enhancement (lambdaapprox. =1) in the J/psi and the two-photon data, and about half the maximum value in the two higher-energy data sets. The pair analysis parameter r lies within a band of +- 0.1 fm around 0.7 fm and is essentially the same for all four data sets. Pion triplet analyses give consistent results for the triplet parameters lambda/sub 3/ and r/sub 3/. In an attempt to investigate the shape of the pion source, we also study the Bose-Einstein correlation in pion pairs using two-dimensional distributions in components of Q/sup 2/.

• Research Organization: Lawrence Berkeley Laboratory and Department of Physics, University of California, Berkeley, California 94720
• OSTI ID: 6551094
• Journal Information: Phys. Rev. D; (United States), Journal Name: Phys. Rev. D; (United States) Vol. 39:1; ISSN PRVDA
• Country of Publication: United States
• Language: English

Related Subjects

645103 -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Strong Interactions & Baryon & Meson 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
BOSE-EINSTEIN STATISTICS
BOSONS
COULOMB FIELD
ELECTRIC FIELDS
ELECTROMAGNETIC INTERACTIONS
ELECTRON-POSITRON INTERACTIONS
ELEMENTARY PARTICLES
ENERGY RANGE
FIELD THEORIES
FUNCTIONS
GEV RANGE
GEV RANGE 01-10
GEV RANGE 10-100
HADRONS
INCLUSIVE INTERACTIONS
INTERACTIONS
LEPTON-LEPTON INTERACTIONS
MASSLESS PARTICLES
MESONS
PARTICLE INTERACTIONS
PARTICLE PRODUCTION
PEP STORAGE RINGS
PHOTONS
PIONS
PIONS MINUS
PIONS PLUS
PROBABILITY
PSEUDOSCALAR MESONS
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
SPACE-TIME
SPEAR
STORAGE RINGS
WAVE FUNCTIONS