On the Kinematic Reconstruction of e+e-→ W+W-→ jjτντEvents

الأصل · EN

We show that the kinematic reconstruction of the e+e-→ W+W-→ jjτ-ντevents have a one-parameter ambiguity when reconstructed from the momentum of all measured W-decay products. We propose a hybrid method of reconstruction of the e+e-→ W+W-→ jjτ-ντevents. This is based on the observation that the difference between the τ-production angles and the production angles of the sum of its visible decay products is small, whilst the τ-energy is poorly reconstructed. This method consists of taking the τ-production angles from those measured for the sum of the visible τ-decay products and reconstructing the τ-energy from energy-momentum conservation constraints. A reconstruction using this method is found to be well-defined and possess a unique solution for the τ-momentum range at LEP II and NLC.