Tau-polarization at the z-peak from the acollinearity between both tau-decay products
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Tau-polarization at the z-peak from the acollinearity between both tau-decay products

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Tau-polarization at the z-peak from the acollinearity between both tau-decay products

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Alemany, Ricard; Rius Dionis, Nuria Perfil; Bernabeu Alberola, José Perfil; Gómez Cadenas, Juan José Perfil; Pich Zardoya, Antonio Perfil
Aquest document és un/a article, creat/da en: 1992
We discuss the possibility of measuring the tau-polarization distribution at the Z peak by studying the angular correlated distributions between the decay products Of the tau-pairs. We give explicit formulae for the energy-energy correlation and for the acollinearity distribution of the decay products of the tau-pairs, for both the cross section and the forward-backward asymmetry, as a function of the tau-Polarization and the Z-polarization. These distributions provide an independent method of measuring the tau-polarization, with a sensitivity comparable to the one that can be achieved by studying the energy spectrum of the produced pion in the decay-tau --> pi-nu(tau), and possibly better systematic errors. This new technique thus offers the prospect to achieve an increased precision in the determination of the electroweak mixing angle.

    Alemany, Ricard; Rius Dionis, Nuria; Bernabeu Alberola, José; Gómez Cadenas, Juan José; Pich Zardoya, Antonio (1992) Tau-polarization at the z-peak from the acollinearity between both tau-decay products Nuclear Physics B 379 1-2 3 23
http://dx.doi.org/10.1016/0550-3213(92)90587-2
distribuït sota llicència Creative Commons de Reconeixement-NoComercial 3.0 No adaptada

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