Charmed meson production and decay
Conference
·
OSTI ID:5329843
Charmed meson production through two body processes in e/sup +/e/sup -/ annihilation is discussed. Evidence for states of charm excitation beyond the D* is obtained through an analysis of the recoil spectrum against D's produced at Ecm = 4.415 GeV. Direct observation of the reaction D*/sup +/ ..-->.. ..pi../sup +/D/sup 0/ in SPEAR data taken at Ecm exceeding 5 GeV is discussed. This reaction provides an extremely accurate determination of the D*/sup +/, D/sup 0/ mass difference (M/sub D*/sup +// -- M/sub D/sup 0// = 145.3 +- 0.5 MeV/c/sup 2/) and a new upper limit on D/sup 0/ -- anti D/sup 0/ mixing effects. The results of fits to the D/sup 0/, D/sup +/ recoil spectrum are discussed. These fits provide considerable information on the masses, production mechanisms, and decays of charmed mesons. This is followed by a brief presentation of the known cross sections for charmed meson production and decay and an analysis of possible resonant structure in the decay products of the D/sup 0/ and D/sup +/. Lastly, a bubble chamber D/sup 0/ candidate submitted by Hagopian et al., of Florida State University is discussed.
- Research Organization:
- California Univ., Berkeley (USA). Lawrence Berkeley Lab.
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 5329843
- Report Number(s):
- LBL-6723; CONF-770406-3
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
645101* -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Electromagnetic Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANNIHILATION
BASIC INTERACTIONS
BOSONS
CHARM PARTICLES
CROSS SECTIONS
D RESONANCES
DECAY
ELECTROMAGNETIC INTERACTIONS
ELECTRON-POSITRON INTERACTIONS
ELEMENTARY PARTICLES
ENERGY RANGE
GEV RANGE
GEV RANGE 01-10
HADRONS
INTERACTIONS
KAONS
LEPTON-LEPTON INTERACTIONS
MASS
MESON RESONANCES
MESONS
PARTICLE INTERACTIONS
PARTICLE PRODUCTION
PIONS
PIONS MINUS
PIONS PLUS
POSTULATED PARTICLES
PSEUDOSCALAR MESONS
RECOILS
RESONANCE PARTICLES
STRANGE PARTICLES
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANNIHILATION
BASIC INTERACTIONS
BOSONS
CHARM PARTICLES
CROSS SECTIONS
D RESONANCES
DECAY
ELECTROMAGNETIC INTERACTIONS
ELECTRON-POSITRON INTERACTIONS
ELEMENTARY PARTICLES
ENERGY RANGE
GEV RANGE
GEV RANGE 01-10
HADRONS
INTERACTIONS
KAONS
LEPTON-LEPTON INTERACTIONS
MASS
MESON RESONANCES
MESONS
PARTICLE INTERACTIONS
PARTICLE PRODUCTION
PIONS
PIONS MINUS
PIONS PLUS
POSTULATED PARTICLES
PSEUDOSCALAR MESONS
RECOILS
RESONANCE PARTICLES
STRANGE PARTICLES