Measurement of the leptonic branching ratios of the UPSILON(1S), UPSILON(2S), and UPSILON(3S)

Journal Article · Mon Mar 14 04:00:00 EST 1983 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.50.807· OSTI ID:6237627

Andrews, D; Avery, P; Berkelman, K

Using the CLEO detector at the Cornell Electron Storage Ring, the authors have measured the leptonic branching fraction, B/sub mumu/, of the UPSILON(1S), UPSILON(2S), and UPSILON(3S) to be 2.7 +- 0.3 +- 0.3%, 1.9 +- 1.3 +- 0.5%, and 3.3 +- 1.3 +- 0.7%, respectively. Combining these values of B/sub mumu/ with previous measurements of the leptonic widths of these resonances, the authors find the total width of the UPSILON(1S), UPSILON(2S), and UPSILON(3S) to be 48 +- 4 +- 4, 27 +- 17 +- 6, and 13 +- 4 +- 3 keV.

• Research Organization: Cornell University, Ithaca, New York 14853
• OSTI ID: 6237627
• Journal Information: Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 50:11; ISSN PRLTA
• Country of Publication: United States
• Language: English

Related Subjects

645102* -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Weak Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BASIC INTERACTIONS
BOSONS
BRANCHING RATIO
CESR STORAGE RING
CROSS SECTIONS
DATA
DECAY
ELECTRODYNAMICS
ELEMENTARY PARTICLES
EXPERIMENTAL DATA
FERMIONS
FIELD THEORIES
HADRONS
INFORMATION
INTERACTIONS
LEPTONIC DECAY
LEPTONS
MESON RESONANCES
MESONS
MONTE CARLO METHOD
MUONS
NUMERICAL DATA
PARTICLE DECAY
QUANTUM CHROMODYNAMICS
QUANTUM ELECTRODYNAMICS
QUANTUM FIELD THEORY
RESONANCE PARTICLES
STORAGE RINGS
UPSILON RESONANCES
WEAK INTERACTIONS
WEAK PARTICLE DECAY