Observation of charmed-baryon production in e/sup +/e/sup -/ annihilation
Journal Article
·
· Phys. Rev. Lett.; (United States)
A peak in the pK/sup -/..pi../sup +/ and p-barK/sup +/..pi../sup -/ invariant-mass spectra at 2.285 +- 0.006 GeV/c/sup 2/ is observed, which is associated with the lowest-lying charmed baryon (..lambda../sub c/). A cross section times branching ratio of 0.037 +- 0.012 nb at E/sub c.m./=5.2 GeV is measured with a substantial fraction of the events produced with an equal recoiling mass. New measurements of inclusive p and ..lambda.. cross sections are also presented, allowing an estimate of the branching ratio B (..lambda../sub c/ ..-->.. pK/sup -/..pi../sup +/) =0.022 +- 0.010.
- Research Organization:
- SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
- DOE Contract Number:
- DE-ACO3-765FOO515; W-7405-ENG-48
- OSTI ID:
- 5635373
- Journal Information:
- Phys. Rev. Lett.; (United States), Vol. 44:1
- Country of Publication:
- United States
- Language:
- English
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Conference
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Tue Jul 01 00:00:00 EDT 1980
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OSTI ID:5635373
Charmed baryon decays observed in e/sup +/e/sup -/ annihilation at SPEAR
Thesis/Dissertation
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Fri Jan 01 00:00:00 EST 1982
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Charmed baryon decays observed in e/sup +/e/sup -/ annihilation at SPEAR
Technical Report
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Tue Dec 01 00:00:00 EST 1981
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OSTI ID:5635373
Related Subjects
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CHARMED BARYON RESONANCES
PARTICLE PRODUCTION
WEAK HADRONIC DECAY
ELECTRON-POSITRON INTERACTIONS
ANNIHILATION
BRANCHING RATIO
CROSS SECTIONS
GEV RANGE 01-10
INCLUSIVE INTERACTIONS
MASS SPECTRA
MONTE CARLO METHOD
PARTICLE DECAY
QUANTUM NUMBERS
RECOILS
TIME-OF-FLIGHT METHOD
BARYON RESONANCES
BARYONS
BASIC INTERACTIONS
CHARM PARTICLES
DECAY
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
GEV RANGE
HADRONS
INTERACTIONS
LEPTON-LEPTON INTERACTIONS
PARTICLE INTERACTIONS
POSTULATED PARTICLES
RESONANCE PARTICLES
SPECTRA
WEAK PARTICLE DECAY
645101* - High Energy Physics- Particle Interactions & Properties-Experimental- Electromagnetic Interactions & Properties
CHARMED BARYON RESONANCES
PARTICLE PRODUCTION
WEAK HADRONIC DECAY
ELECTRON-POSITRON INTERACTIONS
ANNIHILATION
BRANCHING RATIO
CROSS SECTIONS
GEV RANGE 01-10
INCLUSIVE INTERACTIONS
MASS SPECTRA
MONTE CARLO METHOD
PARTICLE DECAY
QUANTUM NUMBERS
RECOILS
TIME-OF-FLIGHT METHOD
BARYON RESONANCES
BARYONS
BASIC INTERACTIONS
CHARM PARTICLES
DECAY
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
GEV RANGE
HADRONS
INTERACTIONS
LEPTON-LEPTON INTERACTIONS
PARTICLE INTERACTIONS
POSTULATED PARTICLES
RESONANCE PARTICLES
SPECTRA
WEAK PARTICLE DECAY
645101* - High Energy Physics- Particle Interactions & Properties-Experimental- Electromagnetic Interactions & Properties