Measurement of the Tau Polarisation at LEP
The polarisation of \(\tau\)'s produced in Z decay is measured using 160 pb\(^{-1}\) of data accumulated at LEP by the ALEPH detector between 1990 and 1995. The variation of the polarisation with polar angle yields the two parameters \({\cal A}_e = 0.1504 \pm 0.0068 \) and \({\cal A}_{\tau} = 0...
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| Veröffentlicht in: | The European physical journal. C, Particles and fields Particles and fields, 2001-05, Vol.20 (3), p.401-430 |
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| container_title | The European physical journal. C, Particles and fields |
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| creator | Heister et al, A. |
| description | The polarisation of \(\tau\)'s produced in Z decay is measured using 160 pb\(^{-1}\) of data accumulated at LEP by the ALEPH detector between 1990 and 1995. The variation of the polarisation with polar angle yields the two parameters \({\cal A}_e = 0.1504 \pm 0.0068 \) and \({\cal A}_{\tau} = 0.1451 \pm 0.0059\) which are consistent with the hypothesis of e-\(\tau\) universality. Assuming universality, the value \({\cal A}_{e\mbox{-}\tau} = 0.1474 \pm 0.0045\) is obtained from which the effective weak mixing angle \(\sin^2{\theta_{\mathrm{W}}^{\mathrm{eff}}} =0.23147 \pm 0.00057 \) is derived. |
| doi_str_mv | 10.1007/s100520100689 |
| format | Article |
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The variation of the polarisation with polar angle yields the two parameters \({\cal A}_e = 0.1504 \pm 0.0068 \) and \({\cal A}_{\tau} = 0.1451 \pm 0.0059\) which are consistent with the hypothesis of e-\(\tau\) universality. Assuming universality, the value \({\cal A}_{e\mbox{-}\tau} = 0.1474 \pm 0.0045\) is obtained from which the effective weak mixing angle \(\sin^2{\theta_{\mathrm{W}}^{\mathrm{eff}}} =0.23147 \pm 0.00057 \) is derived.</description><identifier>ISSN: 1434-6044</identifier><identifier>EISSN: 1434-6052</identifier><identifier>DOI: 10.1007/s100520100689</identifier><language>eng</language><publisher>Heidelberg: Springer Nature B.V</publisher><subject>High Energy Physics - Experiment ; Physics ; Polarization</subject><ispartof>The European physical journal. C, Particles and fields, 2001-05, Vol.20 (3), p.401-430</ispartof><rights>The European Physical Journal C - Particles and Fields is a copyright of Springer, (2001). 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| subjects | High Energy Physics - Experiment Physics Polarization |
| title | Measurement of the Tau Polarisation at LEP |
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