Tau polarization effects in the CNGS tau-neutrino appearance experiments
  We studied tau polarization effects on the decay distributions of tau produced in the CNGS tau-neutrino appearance experiments. We show that energy and angular distributions for the decay products in the laboratory frame are significantly affected by the tau polarization. Rather strong azimuthal asymmetry about the tau momentum axis is predicted, which may have observable consequences in experiments even with small statistics. 
Mayumi Aoki, Kaoru Hagiwara, Kentarou Mawatari, Hiroshi Yokoya