Experimental study of charm quark fragmentation
Creators
Description
Charm quark fragmentation is studied in e+e/sup minus/ annihilation at a center of mass energy of 29 GeV using the time-projection-chamber (TPC) detector at the SLAC storage ring PEP. The polarization of the D/sup asterisk/+, the energy dependency of the polarization, and the spin density matrix of D/sup asterisk/ + are measured. In 147pb/sup /minus/1/ of data we see no evidence for polarization, alignment, or final state interaction in this fragmentation process. As a part of elementary particle detector improvement efforts a Radial Drift Chamber (RDC) has been built and studied. The RDC features the use of induced signals on the pickup wires, and wave form sampling to reconstruct tracks through avalanche localization of the radially drifted electrons in dimethyl ether. 30 refs
Availability note (English)
MF available from INIS under the Report Number; Available from NTIS, PC A06/MF A01 - OSTI; 1 as DE89007679.
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Additional details
Publishing Information
- Imprint Pagination
- 123 p.
- Report number
- IS-T--1396
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 20043713
- Subject category
- S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; S46: INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY;
- Resource subtype / Literary indicator
- Thesis
- Descriptors DEI
- CENTER-OF-MASS SYSTEM; CHARM PARTICLES; D MESONS; DATA ACQUISITION SYSTEMS; DATA PROCESSING; DENSITY MATRIX; ELECTRON-POSITRON INTERACTIONS; ENERGY DEPENDENCE; MECHANICAL FRAGMENTATION; PARTICLE DECAY; PEP STORAGE RINGS; QUARKS; SHOWER COUNTERS; SPIN; TRIGGER CIRCUITS
- Descriptors DEC
- ANGULAR MOMENTUM; BOSONS; CHARMED MESONS; DECAY; ELECTRONIC CIRCUITS; ELEMENTARY PARTICLES; FERMIONS; HADRONS; INTERACTIONS; LEPTON-LEPTON INTERACTIONS; MATRICES; MEASURING INSTRUMENTS; MESONS; PARTICLE INTERACTIONS; PARTICLE PROPERTIES; POSTULATED PARTICLES; PSEUDOSCALAR MESONS; PULSE CIRCUITS; RADIATION DETECTORS; STORAGE RINGS
Optional Information
- Notes
- Portions of this document are illegible in microfiche products.