Recent results from SPEAR
Conference
·
OSTI ID:5065464
Recent experimental results on electron--positron annihilation reactions are presented. Included are the observation of a new resonance in e/sup +/e/sup -/ ..-->.. hadrons. This new state occurs at a cms energy of 3772 MeV and is called PSI (3772). This new particle is a copious and clean source of charmed D mesons. Results are given based on this reaction, on measurements of the D/sup 0/ and D/sup +/ masses accurate to better than 1 MeV, on the observation of a new decay mode D/sup +-/ ..-->.. K/sub s/..pi../sup +-/, and on D production angular distribution. Also the production of anomalous electrons are discussed. The multiprong sample is used to derive a value for the semi-leptonic branching ratio of the D meson. 33 references (JFP)
- Research Organization:
- Stanford Linear Accelerator Center, Calif. (USA)
- DOE Contract Number:
- EY-76-S-03-0326
- OSTI ID:
- 5065464
- Report Number(s):
- SLAC-PUB-2024; CONF-770712-4
- Country of Publication:
- United States
- Language:
- English
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·
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Related Subjects
645101* -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Electromagnetic Interactions & Properties
645104 -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Strong Meson-Induced Interactions-- (-1987)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANGULAR DISTRIBUTION
ANNIHILATION
BASIC INTERACTIONS
BOSONS
CHARM PARTICLES
D RESONANCES
D-1865 RESONANCES
DECAY
DISTRIBUTION
ELECTROMAGNETIC INTERACTIONS
ELECTRON-POSITRON INTERACTIONS
ELECTRONS
ELEMENTARY PARTICLES
FERMIONS
HADRONS
INTERACTIONS
LEPTON-LEPTON INTERACTIONS
LEPTONS
MASS
MESON RESONANCES
MESONS
PARTICLE INTERACTIONS
POSTULATED PARTICLES
PSI RESONANCES
PSI-3772 RESONANCES
RESONANCE PARTICLES
VECTOR MESONS
645104 -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Strong Meson-Induced Interactions-- (-1987)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANGULAR DISTRIBUTION
ANNIHILATION
BASIC INTERACTIONS
BOSONS
CHARM PARTICLES
D RESONANCES
D-1865 RESONANCES
DECAY
DISTRIBUTION
ELECTROMAGNETIC INTERACTIONS
ELECTRON-POSITRON INTERACTIONS
ELECTRONS
ELEMENTARY PARTICLES
FERMIONS
HADRONS
INTERACTIONS
LEPTON-LEPTON INTERACTIONS
LEPTONS
MASS
MESON RESONANCES
MESONS
PARTICLE INTERACTIONS
POSTULATED PARTICLES
PSI RESONANCES
PSI-3772 RESONANCES
RESONANCE PARTICLES
VECTOR MESONS