Published September 15, 1975 | Version v1
Journal article Metadata-only

A refined determination of the eta-eta' mixing angle and eta → 2γ decay

Creators

  • 1. Pisa Univ. (Italy). Istituto di Fisica
  • 2. Istituto Nazionale di Fisica Nucleare, Pisa (Italy)

Description

A rigorous determination of the eta-eta' mixing angle theta is obtained within the SU(3) X SU(3) scheme of Gell-Mann, Oakes and Renner, by carefully taking into account possible contributions due to unequal renormalization constants and possible deviations from the pole dominance of the propagators at zero momentum. The result is tan theta = 0.045 +- 0.025. It leads to a determination of GAMMAsub(eta→2γ) in agreement with the recent data and to a value for GAMMAsub(eta'→2γ) approximately 10 keV in agreement with other models. (Auth.)

Additional details

Identifiers

DOI
10.1016/0370-2693(75)90661-9;

Publishing Information

Journal Title
Physics Letters B
Journal Volume
58
Journal Issue
3
Series
Phys. Lett., B.
Journal Page Range
313-316
ISSN
0370-2693

INIS

Country of Publication
Netherlands
Country of Input or Organization
Netherlands
INIS RN
7221091
Subject category
S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
Descriptors DEI
ETA MESONS; ETA-958 RESONANCES; GAMMA RADIATION; HAMILTONIANS; PARTICLE DECAY; PROPAGATOR; QUARK MODEL; SU-3 GROUPS; WARD IDENTITY
Descriptors DEC
BOSONS; COMPOSITE MODELS; DECAY; ELECTROMAGNETIC RADIATION; ELEMENTARY PARTICLES; HADRONS; IONIZING RADIATIONS; LIE GROUPS; MATHEMATICAL MODELS; MATHEMATICAL OPERATORS; MESON RESONANCES; MESONS; PARTICLE MODELS; PSEUDOSCALAR MESONS; QUANTUM OPERATORS; RADIATIONS; RESONANCE PARTICLES; SU GROUPS; SYMMETRY GROUPS

Optional Information

Notes
Updated automatically by Metadata and Full-Text Enrichment Agent