Opposite-sign dilepton production in. nu. /sub. mu. / interactions

Journal Article · Thu Aug 01 04:00:00 EDT 1985 · Phys. Rev. D; (United States)

DOI:https://doi.org/10.1103/PhysRevD.32.531· OSTI ID:5600924

Baker, N J; Cnops, A; Connolly, P L; Kahn, S A; Kirk, H G; Murtagh, M J; Palmer, R B; Samios, N P; Tanaka, M; Baltay, C

We report on a high-statistics bubble-chamber experiment using the Fermilab 15-ft bubble chamber filled with a heavy neon/hydrogen mixture exposed to a wide-band neutrino beam. In a sample of 106 000 ..nu../sub ..mu../ interactions 249 events with a positron (P/sub e//sup +/>0.3 GeV/c) and a negative muon were observed. After corrections, the rate for opposite-sign dilepton production for ..nu../sub ..mu../ charged-current events is (0.52 +- 0.09)%. The E/sub ..nu../ dependence of this rate from threshold to roughly-equal200 GeV is presented. The kinematic distributions and strange-particle content of the dilepton events are consistent with those expected from charm-particle production in neutrino interactions. A total of 58 neutral strange particles (..lambda -->..p..pi../sup -/, K/sub S//sup 0/..--> pi../sup +/..pi../sup -/)= are observed in these events, where less than 16 are expected from conventional charged-current interactions. The presence of a significant excess of ..lambda..'s is evidence for substantial charmed-baryon production.

• Research Organization: Brookhaven National Laboratory, Upton, New York 11973
• OSTI ID: 5600924
• Journal Information: Phys. Rev. D; (United States), Journal Name: Phys. Rev. D; (United States) Vol. 32:3; ISSN PRVDA
• 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
BARYON RESONANCES
BARYONS
BUBBLE CHAMBERS
CHARGED-CURRENT INTERACTIONS
CHARM PARTICLES
CHARMED BARYON RESONANCES
ELEMENTARY PARTICLES
ELEMENTS
FERMIONS
FLUIDS
GAS TRACK DETECTORS
GASES
HADRONS
HYDROGEN
INTERACTIONS
LEPTON-BARYON INTERACTIONS
LEPTON-HADRON INTERACTIONS
LEPTON-NUCLEON INTERACTIONS
LEPTONS
MASSLESS PARTICLES
MEASURING INSTRUMENTS
MUON NEUTRINOS
NEON
NEUTRINO-NUCLEON INTERACTIONS
NEUTRINOS
NONMETALS
PARTICLE INTERACTIONS
PARTICLE PRODUCTION
RADIATION DETECTORS
RARE GASES
RESONANCE PARTICLES
STRANGE PARTICLES