Published July 17, 1986
| Version v1
Journal article
Measurement of the pion axial form factor from radiative decay
Creators
- 1. Lausanne Univ. (Switzerland). Inst. de Physique Nucleaire
- 2. Zurich Univ. (Switzerland). Inst. fuer Physik
Description
The decay π+->e+νγ has been measured by detecting the positron with a magnetic spectrometer and the photon with an array of NaI scintillators. Using CVC to compute the vector form factor from the π0 lifetime we use our data to determine the ratio γ of the axial-vector form factor to the vector form factor. With the best present value for the π0 lifetime (0.897+-0.022+-0.017)x10-16 s and Fsub(V)=(2.55+-0.05)x10-2 we obtain two solutions: γ=0.52+-0.06, favored by a likelihood ratio greater than 8.5 against γ=-2.48+-0.06. (orig.)
Additional details
Publishing Information
- Journal Title
- Phys. Lett., B
- Journal Volume
- 174
- Journal Issue
- 4
- Series
- Phys. Lett., B.
- Journal Page Range
- 445-449
- ISSN
- 0370-2693
- CODEN
- PYLBA
INIS
- Country of Publication
- Netherlands
- Country of Input or Organization
- Netherlands
- INIS RN
- 17081074
- 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; ENERGY SPECTRA; EXPERIMENTAL DATA; FORM FACTORS; LEPTONIC DECAY; PIONS PLUS; RADIATIVE DECAY; VECTOR CURRENTS
- Descriptors DEC
- ALGEBRAIC CURRENTS; BASIC INTERACTIONS; BOSONS; CURRENTS; DATA; DECAY; ELEMENTARY PARTICLES; HADRONS; INFORMATION; INTERACTIONS; MESONS; NUMERICAL DATA; PARTICLE DECAY; PARTICLE PROPERTIES; PIONS; PSEUDOSCALAR MESONS; SPECTRA; WEAK INTERACTIONS; WEAK PARTICLE DECAY