Tau-spin correlations at the z-peak: aplanarities of the decay products
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Tau-spin correlations at the z-peak: aplanarities of the decay products

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Tau-spin correlations at the z-peak: aplanarities of the decay products

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Bernabeu Alberola, José Perfil; Rius Dionis, Nuria Perfil; Pich Zardoya, Antonio Perfil
Aquest document és un/a article, creat/da en: 1991
The production of tau-pairs at the Z peak leads to interesting dynamical information contained in their spin density matrix. Besides the longitudinal polarization of each tau-lepton, there are two independent spin-spin correlations associated with the transverse (within the production plane) and normal (to the production plane) polarization components. The transverse-normal spin correlation is both a parity-odd and time reversal-odd observable. We analyze the correlated angular distribution of the decay products as polarization analyzers of the tau+tau- system. We find two azimuthal asymmetries of the decay products and the incoming beam, which are able to disentangle these spin correlation observables without reconstructing the tau-direction.

    Bernabeu Alberola, José; Rius Dionis, Nuria; Pich Zardoya, Antonio (1991) Tau-spin correlations at the z-peak: aplanarities of the decay products Physics Letters B 257 1-2 219 226
http://dx.doi.org/10.1016/0370-2693(91)90885-T
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