Published July 7, 1988
| Version v1
Journal article
Radiative pion decay: Determination of FA(0) from τ-lepton decay data
Creators
- 1. Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany, F.R.)
- 2. Universidad Autonoma de Barcelona (Spain). Dept. de Fisica Teorica
Description
The form factor FA(0) in π → evγ is calculated, at the soft pion point, directly from data on the semileptonic τ-lepton decays τ → Vτ+nπ, which determine the relevant vector and axial-vector hadronic spectral functions. The reliability of this calculation is assessed by using these fitted spectral functions to check the saturation of the first two Weinberg sum rules. The results are: FA(0)=0.017±0.001±0.004, and γ(0)=FA(0)/FV(0)=0.67±0.04±0.16. (orig.)
Additional details
Publishing Information
- Journal Title
- Phys. Lett., B
- Journal Volume
- 208
- Journal Issue
- 1
- Series
- Phys. Lett., B.
- Journal Page Range
- 131-134
- ISSN
- 0370-2693
- CODEN
- PYLBA
INIS
- Country of Publication
- Netherlands
- Country of Input or Organization
- Netherlands
- INIS RN
- 19081103
- Subject category
- S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
- Resource subtype / Literary indicator
- Numerical Data
- Descriptors DEI
- AXIAL-VECTOR CURRENTS; CHARGED-CURRENT INTERACTIONS; FORM FACTORS; LEPTONIC DECAY; PIONS; RADIATIVE DECAY; SEMILEPTONIC DECAY; SPECTRAL FUNCTIONS; SUM RULES; TAU PARTICLES; THEORETICAL DATA; VECTOR CURRENTS; WEAK CHARGED CURRENTS; WEINBERG LEPTON MODEL
- Descriptors DEC
- ALGEBRAIC CURRENTS; BASIC INTERACTIONS; BOSONS; CHARGED CURRENTS; CURRENTS; DATA; DECAY; ELEMENTARY PARTICLES; EQUATIONS; FERMIONS; FIELD THEORIES; FUNCTIONS; HADRONS; HEAVY LEPTONS; INFORMATION; INTERACTIONS; LEPTONS; MATHEMATICAL MODELS; MESONS; NUMERICAL DATA; PARTICLE DECAY; PARTICLE INTERACTIONS; PARTICLE MODELS; PARTICLE PROPERTIES; PSEUDOSCALAR MESONS; QUANTUM FIELD THEORY; UNIFIED GAUGE MODELS; WEAK INTERACTIONS; WEAK PARTICLE DECAY