Associated electron-muon events from high energy hadronic collisions
Thesis/Dissertation
·
OSTI ID:6688802
The inclusive reaction p + N ..-->.. e + ..mu.. + X was measured at an energy of 38.8 GeV (center of mass). Data representing a total luminosity of 13.4 inverse femtobarns (13.4 x 10/sup 39/ cm/sup -2/) were analyzed. Three associated electron-muon events were observed. The observed signal was 0.02 +/- 0.015 of the Drell-Yan di-muon production. The expected number of e..mu.. events from tau lepton pair production and decay was calculated to be 0.5 +/- 0.1. A two sigma upper limit for (lepton family number violating) two body resonant decays to e = ..mu.. was obtained (<0.020 +/- 0.015 x sigma/sub Drell-Yan/ for masses above 7 Gev at 0.95 C.L.) and interpreted with a physically reasonable model. No prompt e..mu.. events attributable to charm production and decay, or bottom production and decay, were seen. This corresponded to a two sigma upper limit for charm pair production of <300 x sigma/sub Drell-Yan/ for pair masses above 11 GeV. In terms of an absolute cross section, this production limit is <200 picobarn for charm pair masses above 11 GeV. On the other band, the momenta of three candidate events suggested a possible e/sup +/-/K/sup -/+/ source that acted as a non-prompt source of e..mu.. events. A p + N ..-->.. D + antiD ..-->.. e + K ..-->.. e + ..mu.. interpretation of these candidate events was consistent with the lower limit on charm production obtained with the prompt e..mu.. rate.
- Research Organization:
- Washington Univ., Seattle (USA)
- OSTI ID:
- 6688802
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
645101* -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Electromagnetic Interactions & Properties
645102 -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Weak Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
B MESONS
BARYON REACTIONS
BASIC INTERACTIONS
BOSONS
CHARGED-PARTICLE REACTIONS
CHARM PARTICLES
CHARMED MESONS
CROSS SECTIONS
D MESONS
DATA
DECAY
DRELL MODEL
ELECTRONS
ELEMENTARY PARTICLES
ENERGY RANGE
EXPERIMENTAL DATA
FERMIONS
GEV RANGE
GEV RANGE 10-100
HADRON REACTIONS
HADRONS
HEAVY LEPTONS
INFORMATION
INTERACTIONS
LEPTONIC DECAY
LEPTONS
MESONS
MULTIPLE PRODUCTION
MUONS
NUCLEAR REACTIONS
NUCLEON REACTIONS
NUMERICAL DATA
PAIR PRODUCTION
PARTICLE DECAY
PARTICLE PRODUCTION
POSTULATED PARTICLES
PROTON REACTIONS
PSEUDOSCALAR MESONS
TAU PARTICLES
WEAK INTERACTIONS
WEAK PARTICLE DECAY
645102 -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Weak Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
B MESONS
BARYON REACTIONS
BASIC INTERACTIONS
BOSONS
CHARGED-PARTICLE REACTIONS
CHARM PARTICLES
CHARMED MESONS
CROSS SECTIONS
D MESONS
DATA
DECAY
DRELL MODEL
ELECTRONS
ELEMENTARY PARTICLES
ENERGY RANGE
EXPERIMENTAL DATA
FERMIONS
GEV RANGE
GEV RANGE 10-100
HADRON REACTIONS
HADRONS
HEAVY LEPTONS
INFORMATION
INTERACTIONS
LEPTONIC DECAY
LEPTONS
MESONS
MULTIPLE PRODUCTION
MUONS
NUCLEAR REACTIONS
NUCLEON REACTIONS
NUMERICAL DATA
PAIR PRODUCTION
PARTICLE DECAY
PARTICLE PRODUCTION
POSTULATED PARTICLES
PROTON REACTIONS
PSEUDOSCALAR MESONS
TAU PARTICLES
WEAK INTERACTIONS
WEAK PARTICLE DECAY