A measurement of τ polarization in Z° decays
The polarization of τ leptons produced m e+e- + τ +τ-(y) is measured using a sample of 8977 z+r - paars collected near the peak of the Z ° resonance A polanzatlon of -0 132 4- 0 026 (stat) 4- 0 021 (syst) is determined Thts corresponds to a ratm of the vector to the axial-vector couphng constants of...
Guardado en:
| Autores principales: | , |
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| Formato: | Articulo |
| Lenguaje: | Inglés |
| Publicado: |
1992
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| Materias: | |
| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/73190 |
| Aporte de: |
| Sumario: | The polarization of τ leptons produced m e+e- + τ +τ-(y) is measured using a sample of 8977 z+r - paars collected near the peak of the Z ° resonance A polanzatlon of -0 132 4- 0 026 (stat) 4- 0 021 (syst) is determined Thts corresponds to a ratm of the vector to the axial-vector couphng constants of the z lepton to the weak neutral current of T gv/gAeff = 0 0694-0 017 This leads to a value of the effective sm 2 0w at the Z° resonance of sin 2 0eff = 0 23264-0 0043 |
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