Nuclear physics at PEP: Recent results using the Time Projection Chamber
A preliminary result on Bose-Einstein correlations is reported using the PEP-4 Time Projection Chamber facility. The data, from scattering 14.5 GeV electrons on nuclei, was taken at the Stanford Linear Accelerator Center positron-electron (PEP) storage ring. Bose-Einstein (BE) correlations were measured from events having identified like-sign pion pairs. The particle identification and tracking capability of the Time Projection Chamber (TPC) was used to select like-sign pion pair events. The resulting correlation function for the data was fitted to a gaussian form R(q) = 1 + lambda exp(-q/sup 2/sigma/sup 2/) where q is the relative four-momentum difference of the pions. The fitted value to the chaoticity is lambda = 0.37 +- 0.19 and sigma = 1.37 +- 0.41 fermi. This result agrees with that from e/sup +/e/sup -/ annihilation data taken with the TPC. The operation of the TPC and the analysis of the data is explained. The feasibility of similar detectors for doing high energy electron scattering on nuclei at PEP is briefly discussed. 9 refs., 8 figs.
- Research Organization:
- Lawrence Livermore National Lab., CA (USA)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 6359671
- Report Number(s):
- UCRL-96590; CONF-870165-5; ON: DE87009575
- Resource Relation:
- Conference: Workshop on electronuclear physics with internal targets, Stanford, CA, USA, 5 Jan 1987; Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ELECTRON-POSITRON INTERACTIONS
ANNIHILATION
BOSE-EINSTEIN STATISTICS
PROJECTION SPARK CHAMBERS
DESIGN
PERFORMANCE TESTING
ARGON
BOSON-EXCHANGE MODELS
COINCIDENCE METHODS
ELECTRON REACTIONS
PIONS
XENON
BASIC INTERACTIONS
BOSONS
CHARGED-PARTICLE REACTIONS
COUNTING TECHNIQUES
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
ELEMENTS
FLUIDS
GAS TRACK DETECTORS
GASES
HADRONS
INTERACTIONS
LEPTON REACTIONS
LEPTON-LEPTON INTERACTIONS
MATHEMATICAL MODELS
MEASURING INSTRUMENTS
MESONS
NONMETALS
NUCLEAR REACTIONS
PARTICLE INTERACTIONS
PARTICLE MODELS
PERIPHERAL MODELS
PSEUDOSCALAR MESONS
RADIATION DETECTORS
RARE GASES
SPARK CHAMBERS
TESTING
440103* - Radiation Instrumentation- Nuclear Spectroscopic Instrumentation
440104 - Radiation Instrumentation- High Energy Physics Instrumentation