Search for charmed F mesons in e/sup +/e/sup -/ collisions with the crystal ball
In this work an experimental search for the production of the charmed F and F* mesons in e/sup +/e/sup -/ collisions is presented. The data for this analysis were obtained over a center of mass energy region from 3.86 GeV to 4.5 GeV with the Crystal Ball detector at SPEAR. The inclusive eta production cross section has been measured as a function of the center of mass energy. It was found to be almost constant with no indication for an significant increase which was cited as evidence for F production by a previous experiment. A search for F anti F, F* anti F and F* anti F* production with the decay F/sup + -/ ..-->.. eta..pi../sup + -/ has also been made, but no signal was observed. Upper limits for sigma/sub F(*) anti F(*)/ BR(F/sup + -/ ..-->.. eta..pi../sup + -/) are given for various F and F* masses. The measurements presented here are inconsistent with results from earlier experiments which had been used to establish the existence of the F mesons. The inclusive ..gamma.. spectrum at E/sub cm/ = 4.33 GeV has also been used to obtain upper limits on F* production. These results disagree with theoretical expectations for the F* anti F* production cross section for the F and F* masses quoted by other experiments. In connection with this analysis the cross section for D* production was also measured at E/sub cm/ = 4.33 GeV and was found to be 7.4nb +- 1.3nb.
- Research Organization:
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- DOE Contract Number:
- AC03-76SF00515
- OSTI ID:
- 5204846
- Report Number(s):
- SLAC-266; HEPL-937; ON: DE84007453
- Resource Relation:
- Other Information: Portions are illegible in microfiche products. Original copy available until stock is exhausted. Thesis
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ELECTRON-POSITRON INTERACTIONS
PARTICLE PRODUCTION
ETA MESONS
F RESONANCES
RADIATIVE DECAY
F-2030 RESONANCES
WEAK HADRONIC DECAY
CROSS SECTIONS
EXPERIMENTAL DATA
GAMMA SPECTRA
GEV RANGE 01-10
INCLUSIVE INTERACTIONS
MASS SPECTRA
PIONS MINUS
PIONS NEUTRAL
PIONS PLUS
SPARK CHAMBERS
BOSONS
CHARM PARTICLES
CHARMED MESON RESONANCES
DATA
DECAY
ELEMENTARY PARTICLES
ENERGY RANGE
GAS TRACK DETECTORS
GEV RANGE
HADRONS
INFORMATION
INTERACTIONS
LEPTON-LEPTON INTERACTIONS
MEASURING INSTRUMENTS
MESON RESONANCES
MESONS
NUMERICAL DATA
PARTICLE DECAY
PARTICLE INTERACTIONS
PIONS
POSTULATED PARTICLES
PSEUDOSCALAR MESONS
RADIATION DETECTORS
RESONANCE PARTICLES
SPECTRA
WEAK PARTICLE DECAY
645101* - High Energy Physics- Particle Interactions & Properties-Experimental- Electromagnetic Interactions & Properties
645102 - High Energy Physics- Particle Interactions & Properties-Experimental- Weak Interactions & Properties