Production of charmonium states in 225 GeV/c pi-minus beryllium interactions
This thesis reports on the analysis of data obtained during the FNAL experiment E610. The Chicago Cyclotron Magnet Spectrometer was used to perform a study of the hadronic production of charmonium. A 225 GeV/c negative pion beam was incident on a beryllium target. The trigger required a dimuon signature which favored opposite sign muon pairs with a large combined p/sub tau/. A search was then made for chi mesons of the charmonium spectrum by combining J/psi mesons found in the dimuon spectrum with photons detected in a large lead glass shower detector. These events were used to determine the fraction of J/psis produced from chis. A psi(3685) signal seen in the dimuon spectrum was used to determine the fraction of J/psis resulting from psi(3685). Assuming that these are the only particles decaying to J/psi, we obtain the fraction of J/psis produced directly in hadronic collisions - 0.58 +- 0.09 - which is relevant to the production mechanism for charmonium in strong interactions.
- Research Organization:
- Illinois Univ., Urbana (USA). Dept. of Physics
- DOE Contract Number:
- AC02-76ER01195
- OSTI ID:
- 5422916
- Report Number(s):
- DOE/ER/01195-490; COO-1195-490; ON: DE84005492
- Resource Relation:
- Other Information: Portions are illegible in microfiche products. Thesis
- Country of Publication:
- United States
- Language:
- English
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Production of charmonium states in 225 GeV/c Pi-minus beryllium interactions
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Related Subjects
BERYLLIUM 9 TARGET
PION MINUS REACTIONS
CHARMONIUM
PARTICLE PRODUCTION
CHI RESONANCES
EXPERIMENTAL DATA
GEV RANGE 100-1000
HADRONIC PARTICLE DECAY
MASS SPECTRA
MUON PAIRS
PAIR PRODUCTION
PARTON MODEL
PSI-3105 RESONANCES
PSI-3695 RESONANCES
QUARK MODEL
RADIATIVE DECAY
SHOWER COUNTERS
TRANSVERSE MOMENTUM
BOSONS
CHARGED-PARTICLE REACTIONS
COMPOSITE MODELS
DATA
DECAY
ELEMENTARY PARTICLES
ENERGY RANGE
GEV RANGE
HADRON REACTIONS
HADRONS
INFORMATION
INTERACTIONS
LINEAR MOMENTUM
MATHEMATICAL MODELS
MEASURING INSTRUMENTS
MESON REACTIONS
MESON RESONANCES
MESONS
NUCLEAR REACTIONS
NUMERICAL DATA
PARTICLE DECAY
PARTICLE MODELS
PION REACTIONS
PSI RESONANCES
QUARKONIUM
RADIATION DETECTORS
RESONANCE PARTICLES
SPECTRA
TARGETS
VECTOR MESONS
645104* - High Energy Physics- Particle Interactions & Properties-Experimental- Strong Meson-Induced Interactions- (-1987)