Measurement of W polarisation at LEP
The three different helicity states of W bosons produced in the reaction e+e− → W+W− → νqq ̄ at LEP are studied using leptonic and hadronic W decays. Data at centre-of-mass energies √s = 183–209 GeV are used to measure the polarisation of W bosons, and its dependence on the W boson production angle....
Guardado en:
| Autores principales: | , |
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| Formato: | Articulo |
| Lenguaje: | Inglés |
| Publicado: |
2003
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| Materias: | |
| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/77097 |
| Aporte de: |
| Sumario: | The three different helicity states of W bosons produced in the reaction e+e− → W+W− → νqq ̄ at LEP are studied using leptonic and hadronic W decays. Data at centre-of-mass energies √s = 183–209 GeV are used to measure the polarisation of W bosons, and its dependence on the W boson production angle. The fraction of longitudinally polarised W bosons is measured to be 0.218 ± 0.027 ± 0.016 where the first uncertainty is statistical and the second systematic, in agreement with the Standard Model expectation. |
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