Published June 29, 1992 | Version v1
Journal article Metadata-only

Search for weakly interacting neutral bosons produced in π-p interactions at rest and decaying into e+e- pairs

Creators

  • 1. Department of Physics, University of British Columbia, Vancouver, British Columbia, V6T1Z1 (Canada)
  • 2. Physik-Institut der Universitaet Zuerich, CH-8001 Zuerich (Switzerland)
  • 3. Paul Scherrer Institut, CH-5232 Villigen (Switzerland)
  • 4. Institut fuer Mittelenergiephysik der Eidgenoessische Technische Hochschule Zuerich, Paul Scherrer Institut, CH-5232 Villigen (Switzerland)
  • 5. Centre d'Etudes Nucleaires de Saclay, Departement de Physique Nucleaire et de Hautes Energies, F-91191 Gif-sur-Yvette (France)

Description

We present the result of a search for weakly interacting neutral bosons (X) produced in π-p interactions at rest and decaying into e+e- pairs. The data sample searched contains 98 400 π0→e+e-γ decays and 27 200 π-p→ne+e- events, each with an e+e- invariant mass between 25 and 139 MeV/c2. They were observed in the SINDRUM I magnetic spectrometer at the Paul Scherrer Institute (Switzerland). We measure upper limits for the branching ratios Γ(π0→Xγ, X→e+e-)/Γ(π0→all) and Γ(π-p→Xn, X→e+e-)/Γ(π-p→all) for X lifetimes between 10-23 and 10-11 s

Additional details

Publishing Information

Journal Title
Physical Review Letters
Journal Volume
68
Journal Issue
26
Journal Page Range
p. 3845-3848.
ISSN
0031-9007
CODEN
PRLTAO

INIS

Country of Publication
United States
Country of Input or Organization
United States
INIS RN
24013203
Subject category
S73: NUCLEAR PHYSICS AND RADIATION PHYSICS; S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
Resource subtype / Literary indicator
Numerical Data
Descriptors DEI
BOSONS; BRANCHING RATIO; ELECTRONS; EXPERIMENTAL DATA; LIMITING VALUES; MONTE CARLO METHOD; PAIR PRODUCTION; PARTICLE PRODUCTION; PION MINUS-PROTON INTERACTIONS; POSITRONS; POSTULATED PARTICLES
Descriptors DEC
ANTILEPTONS; ANTIMATTER; ANTIPARTICLES; CALCULATION METHODS; DATA; ELEMENTARY PARTICLES; FERMIONS; HADRON-HADRON INTERACTIONS; INFORMATION; INTERACTIONS; LEPTONS; MATTER; MESON-BARYON INTERACTIONS; MESON-NUCLEON INTERACTIONS; NUMERICAL DATA; PARTICLE INTERACTIONS; PION-NUCLEON INTERACTIONS; PION-PROTON INTERACTIONS