Resonance Chiral Lagrangian analysis of τ<SUP>-</SUP>→η<SUP>(′)</SUP>π<SUP>-</SUP>π<SUP>0</SUP>ν<SUB>τ</SUB>
The hadronization structure of τ<SUP>-</SUP>→η<SUP>(′)</SUP>π<SUP>-</SUP>π<SUP>0</SUP>ν<SUB>τ</SUB> decays is analyzed using chiral perturbation theory with resonances, considering only the contribution of the lightest meson resonances at l...
| Autores: | , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2012 |
| País: | Argentina |
| Institución: | Universidad Nacional de La Plata |
| Repositorio: | SEDICI (UNLP) |
| Idioma: | inglés |
| OAI Identifier: | oai:sedici.unlp.edu.ar:10915/96144 |
| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/96144 |
| Access Level: | acceso abierto |
| Palabra clave: | Física Quantum chromodynamics Chiral symmetry Decays of the tau lepton |
| Sumario: | The hadronization structure of τ<SUP>-</SUP>→η<SUP>(′)</SUP>π<SUP>-</SUP>π<SUP>0</SUP>ν<SUB>τ</SUB> decays is analyzed using chiral perturbation theory with resonances, considering only the contribution of the lightest meson resonances at leading order in the 1/N C expansion. After imposing the asymptotic behavior of vector spectral functions ruled by QCD, unknown effective couplings are determined by fitting the τ<SUP>-</SUP>→η<SUP>(′)</SUP>π<SUP>-</SUP>π<SUP>0</SUP>ν<SUB>τ</SUB> branching ratio and decay spectrum to recent data. Predictions for the partner decay τ<SUP>-</SUP>→η<SUP>(′)</SUP>π<SUP>-</SUP>π<SUP>0</SUP>ν<SUB>τ</SUB> and the low-energy behavior of the cross section σ(e+e -→ηπ +π -) are also discussed. |
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