{upsilon} Production in hadronic Z decays
Journal Article
·
· AIP Conference Proceedings
- Labor fuer Hochenergiephysik, ETH Zuerich (Switzerland)
We have searched for evidence of {upsilon} production in 3.5 million hadronic Z decays collected by the L3 detector at LEP in 1991-1995. No signals are observed for the decay chain Z{yields}{upsilon}X; {upsilon}{yields}l{sup +}l{sup -} (l=e,{mu}), therefore upper limits at the 95% confidence level are set on the following Z branching fractions: Br(Z{yields}{upsilon}(1S)X)<5.5x10{sup -5}, Br(Z{yields}{upsilon}(2S)X)<13.9x10{sup -5}, Br(Z{yields}{upsilon}(3S)X)<9.4x10{sup -5}.
- OSTI ID:
- 21185753
- Journal Information:
- AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 432; ISSN APCPCS; ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BRANCHING RATIO
ELECTRON-POSITRON INTERACTIONS
ELECTRONS
LEP STORAGE RINGS
MULTIPARTICLE SPECTROMETERS
MUONS
PARTICLE DECAY
PARTICLE IDENTIFICATION
PARTICLE PRODUCTION
RESONANCE PARTICLES
REST MASS
UPSILON-10355 MESONS
UPSILON-10580 MESONS
UPSILON-9460 MESONS
Z NEUTRAL BOSONS
BRANCHING RATIO
ELECTRON-POSITRON INTERACTIONS
ELECTRONS
LEP STORAGE RINGS
MULTIPARTICLE SPECTROMETERS
MUONS
PARTICLE DECAY
PARTICLE IDENTIFICATION
PARTICLE PRODUCTION
RESONANCE PARTICLES
REST MASS
UPSILON-10355 MESONS
UPSILON-10580 MESONS
UPSILON-9460 MESONS
Z NEUTRAL BOSONS