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|Title:||Tau polarization at the Z peak from the acollinearity between both τ-decay products|
|Authors:||Alemany-Fernández, R.; Rius, Nuria; Bernabéu, José; Gómez Cadenas, Juan José; Pich, Antonio|
|Citation:||Nuclear Physics B 379(1-2): 3-23 (1992)|
|Abstract:||We discuss the possibility of measuring the τ-polarization distribution at the Z peak by studying the angular correlated distributions between the decay products of the τ-pairs. We give explicit formulae for the energy-energy correlation and for the acollinearity distribution of the decay products of the τ-pairs, for both the cross section and the forward-backward asymmetry, as a function of the τ-polarization and the Z-polarization. These distributions provide an independent method of measuring the τ-polarization, with a sensitivity comparable to the one that can be achieved by studying the energy spectrum of the produced pion in the decay τ → πντ, 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.|
|Description:||21 páginas, 4 figuras, 6 tablas.|
|Publisher version (URL):||http://dx.doi.org/10.1016/0550-3213(92)90587-2|
|Appears in Collections:||(IFIC) Artículos|
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