Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/33359
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Título : Tau polarization at the Z peak from the acollinearity between both τ-decay products
Autor : Alemany-Fernández, R., Rius, Nuria, Bernabéu, José, Gómez Cadenas, Juan José, Pich, Antonio
Fecha de publicación : 20-Jul-1992
Editor: Elsevier
Citación : Nuclear Physics B 379(1-2): 3-23 (1992)
Resumen: 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.
Descripción : 21 páginas, 4 figuras, 6 tablas.
Versión del editor: http://dx.doi.org/10.1016/0550-3213(92)90587-2
URI : http://hdl.handle.net/10261/33359
ISSN: 0550-3213
DOI: 10.1016/0550-3213(92)90587-2
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