Published 1989
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The decay τ→3πντ and characteristics of a1 meson
Description
The phenomenological meson Lagrangian based on the four-quark interactions of the scalar, pseudoscalar, vector and axial-vector types is used for description of the decay τ-→π+π-π-ντ. The structure of the main hadronic vertex a1-no is discussed. The expression for the axial hadronic current Jμ(a1→3π) is obtained. The low-energy limit of this current is analyzed. Spectral functions for the main channel of the given process are calculated. The fitting of the experimental data leads to the following values of the a1 meson parameters: ma1=1242 37 MeV, Γa1=465143+228 MeV (DELCO); ma1=1260±14 MeV, Γa1=298-34+40 MeV (MARK 2); ma1=1250±9 MeV, Γa1=488±32 MeV (AFGUS). 27 refs.; 4 figs.; 2 tabs
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Additional details
Publishing Information
- Imprint Pagination
- 15 p.
- Report number
- JINR-E--2-89-829
INIS
- Country of Publication
- USSR
- Country of Input or Organization
- USSR
- INIS RN
- 22058175
- Subject category
- S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
- Descriptors DEI
- AXIAL-VECTOR CURRENTS; A1-1270 MESONS; FEYNMAN DIAGRAM; LEPTONIC DECAY; MASS SPECTRA; MATRIX ELEMENTS; PIONS MINUS; PIONS PLUS; QUARK MODEL; SCALAR MESONS; TAU PARTICLES; VECTOR CURRENTS
- Descriptors DEC
- ALGEBRAIC CURRENTS; AXIAL VECTOR MESONS; BASIC INTERACTIONS; BOSONS; COMPOSITE MODELS; CURRENTS; DECAY; DIAGRAMS; ELEMENTARY PARTICLES; FERMIONS; HADRONS; HEAVY LEPTONS; INFORMATION; INTERACTIONS; LEPTONS; MATHEMATICAL MODELS; MESONS; PARTICLE DECAY; PARTICLE MODELS; PIONS; PSEUDOSCALAR MESONS; SPECTRA; WEAK INTERACTIONS; WEAK PARTICLE DECAY
Optional Information
- Notes
- Submitted to Z. Phys., C.