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Search for a Bhabha-scattering resonance near 1. 8 MeV/c/sup 2/

Journal Article · · Phys. Rev. D; (United States)
;
We use a magnetic spectrometer with a Si(Li) detector to observe the Bhabha scattering of collimated /sup 82/Sr-/sup 82/Rb ..beta..-decay positrons in a thin Be foil. We find no evidence for any e/sup +/-e/sup -/ resonances in the vicinity of the 1.8-MeV/c/sup 2/ mass suggested by the e/sup +/-e/sup -/ events observed in heavy-ion collisions near the Coulomb barrier. At 1.8 MeV, the 90%-confidence upper limit on the product of the resonance cross section and its width is 1 b keV for widths less than 6 keV. We infer that a singlet resonance coupling only to e/sup +/-e/sup -/ must have a width narrower than 2.5 eV.
Research Organization:
ATandT Bell Laboratories, Murray Hill, New Jersey 07974
OSTI ID:
6348122
Journal Information:
Phys. Rev. D; (United States), Journal Name: Phys. Rev. D; (United States) Vol. 36:3; ISSN PRVDA
Country of Publication:
United States
Language:
English

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Related Subjects

645102* -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Weak Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ALKALI METAL ISOTOPES
ALKALINE EARTH ISOTOPES
ALKALINE EARTH METALS
BERYLLIUM
BETA DECAY
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY
BETA-PLUS DECAY RADIOISOTOPES
BHABHA SCATTERING
COULOMB FIELD
CROSS SECTIONS
DAYS LIVING RADIOISOTOPES
DECAY
ELASTIC SCATTERING
ELECTRIC FIELDS
ELECTRON CAPTURE RADIOISOTOPES
ELECTRON-POSITRON INTERACTIONS
ELEMENTS
ENERGY RANGE
EVEN-EVEN NUCLEI
HOURS LIVING RADIOISOTOPES
INTERACTIONS
INTERMEDIATE MASS NUCLEI
ISOTOPES
LEPTON REACTIONS
LEPTON-LEPTON INTERACTIONS
MAGNETIC SPECTROMETERS
MASS
MEASURING INSTRUMENTS
METALS
MEV RANGE
MEV RANGE 01-10
MINUTES LIVING RADIOISOTOPES
NUCLEAR REACTIONS
NUCLEI
ODD-ODD NUCLEI
PAIR PRODUCTION
PARTICLE INTERACTIONS
POSITRON REACTIONS
RADIOISOTOPES
RESONANCE
RUBIDIUM 82
RUBIDIUM ISOTOPES
SCATTERING
SPECTROMETERS
STRONTIUM 82
STRONTIUM ISOTOPES