High-statistics study of UPSILON(2S). --> pi. /sup +/. pi. /sup -/UPSILON(1S)
Journal Article
·
· Phys. Rev. D; (United States)
A detailed investigation of the decay UPSILON(2S)..--> pi../sup +/..pi../sup -/UPSILON(1S) has been made from 128 000 UPSILON(2S) decays observed in the CLEO detector at the Cornell Electron Storage Ring (CESR). We find this branching ratio to be (19.1 +- 1.2 +- 0.6)%. The properties of the ..pi pi.. system have been studied using 491 exclusive events of the type UPSILON(2S)..--> pi../sup +/..pi../sup -/UPSILON(1S), UPSILON(1S)..-->..e/sup +/e/sup -/ or ..mu../sup +/..mu../sup -/. Assuming e-..mu.. universality we find B(UPSILON(1S)..--> mu../sup +/..mu../sup -/) = (2.84 +- 0.18 +- 0.20)%. A search for UPSILON(2S)..-->..etaUPSILON(1S) yields an upper limit of 1% at the 90% confidence level for this branching ratio. We have also searched for (UPSILON(2S) or UPSILON(3S))..--> pi../sup +/..pi../sup -/UPSILON(1S), UPSILON(1S)..-->..noninteracting particles.
- Research Organization:
- Rutgers University, New Brunswick, New Jersey 08854
- OSTI ID:
- 5997431
- Journal Information:
- Phys. Rev. D; (United States), Journal Name: Phys. Rev. D; (United States) Vol. 30:7; ISSN PRVDA
- Country of Publication:
- United States
- Language:
- English
Similar Records
Observation of {upsilon}(2S){yields}{eta}{upsilon}(1S) and Search for Related Transitions
Leptonic, hadronic, and radiative decay of the b anti-b quarkonium
Measurement of the branching ratio of UPSILON(2S). --> pi. /sup +/. pi. /sup -/+UPSILON(1S)
Journal Article
·
Thu Nov 06 23:00:00 EST 2008
· Physical Review Letters
·
OSTI ID:21179887
Leptonic, hadronic, and radiative decay of the b anti-b quarkonium
Thesis/Dissertation
·
Mon Dec 31 23:00:00 EST 1984
·
OSTI ID:5678431
Measurement of the branching ratio of UPSILON(2S). --> pi. /sup +/. pi. /sup -/+UPSILON(1S)
Journal Article
·
Mon May 04 00:00:00 EDT 1981
· Phys. Rev. Lett.; (United States)
·
OSTI ID:6333120
Related Subjects
645102* -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Weak Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BOSONS
BRANCHING RATIO
DATA
DECAY
ELEMENTARY PARTICLES
EXPERIMENTAL DATA
HADRONS
INFORMATION
MESON RESONANCES
MESONS
NUMERICAL DATA
PARTICLE DECAY
PIONS
PIONS MINUS
PIONS PLUS
PSEUDOSCALAR MESONS
RESONANCE PARTICLES
UPSILON RESONANCES
UPSILON-10000 RESONANCES
UPSILON-9500 RESONANCES
WEAK HADRONIC DECAY
WEAK PARTICLE DECAY
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BOSONS
BRANCHING RATIO
DATA
DECAY
ELEMENTARY PARTICLES
EXPERIMENTAL DATA
HADRONS
INFORMATION
MESON RESONANCES
MESONS
NUMERICAL DATA
PARTICLE DECAY
PIONS
PIONS MINUS
PIONS PLUS
PSEUDOSCALAR MESONS
RESONANCE PARTICLES
UPSILON RESONANCES
UPSILON-10000 RESONANCES
UPSILON-9500 RESONANCES
WEAK HADRONIC DECAY
WEAK PARTICLE DECAY