Published October 15, 1994 | Version v1
Journal article Metadata-only

Measurement of the Dalitz decay of π0 produced in heavy ion collisions at intermediate energies

Creators

  • 1. Istituto Nazionale di Fisica Nucleare, Sezione di, Catania (Italy)
  • 2. Dipartimento di Fisica, Universita di Catania (Italy)
  • 3. Istituto Nazionale di Fisica Nucleare, Laboratorio Nazionale del Sud (Italy)

Description

An experimental search for events with three electromagnetic showers originating from the Dalitz decay of the π0 meson (π0→γe+e-) has been carried out using a BaF2 multidetector array covering a large fraction of the overall solid angle in an experiment where the main decay mode π0→γγ was measured at the same time. Neutral pions were produced in the reaction 36Ar+27Al at 3.4 GeV laboratory incident energy. Identification of the π0 3-body decay was achieved by an invariant mass analysis after a selection of the events. A branching ratio Γ(γe+e-)/Γ(2γ)=(1.32±0.11)x10-2 was deduced. ((orig.))

Additional details

Publishing Information

Journal Title
Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment
Journal Volume
350
Journal Issue
1-2
Journal Page Range
p. 192-198.
ISSN
0168-9002
CODEN
NIMAER

INIS

Country of Publication
Netherlands
Country of Input or Organization
Netherlands
INIS RN
26012863
Subject category
S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; S73: NUCLEAR PHYSICS AND RADIATION PHYSICS; S73: NUCLEAR PHYSICS AND RADIATION PHYSICS;
Resource subtype / Literary indicator
Numerical Data
Descriptors DEI
ALUMINIUM 27 TARGET; ANGULAR DISTRIBUTION; ARGON 36 REACTIONS; BRANCHING RATIO; CHARGED PARTICLES; DALITZ PLOT; EFFECTIVE MASS; ELECTRONS; ENERGY SPECTRA; EXPERIMENTAL DATA; GAMMA RADIATION; GEV RANGE 01-10; INCLUSIVE INTERACTIONS; LEPTONIC DECAY; MASS SPECTRA; MULTIPLICITY; PARTICLE PRODUCTION; PHOTONS; PIONS NEUTRAL; POSITRONS; RADIATIVE DECAY
Descriptors DEC
ANTILEPTONS; ANTIMATTER; ANTIPARTICLES; BASIC INTERACTIONS; BOSONS; DATA; DECAY; DIAGRAMS; DISTRIBUTION; ELECTROMAGNETIC RADIATION; ELEMENTARY PARTICLES; ENERGY RANGE; FERMIONS; GEV RANGE; HADRONS; HEAVY ION REACTIONS; INFORMATION; INTERACTIONS; IONIZING RADIATIONS; LEPTONS; MASS; MASSLESS PARTICLES; MATTER; MESONS; NUCLEAR REACTIONS; NUMERICAL DATA; PARTICLE DECAY; PARTICLE INTERACTIONS; PIONS; PSEUDOSCALAR MESONS; RADIATIONS; SCATTERPLOTS; SPECTRA; TARGETS; WEAK INTERACTIONS; WEAK PARTICLE DECAY