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, J. (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, J. (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
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