2003/05/31 by K. Hagiwara, Katsuro Hagiwara, Kentarou Mawatari +3 · 4 citations
Physics and Astronomy · #Dark Matter and Cosmic Phenomena #Neutrino Physics Research #Particle physics theoretical and experimental studies #hep-ph
paper · pdf · doi:10.1016/s0550-3213(03)00575-3
published as Nucl.Phys. B668 (2003) 364-384; Erratum-ibid. B701 (2004) 405-406 · 23 pages, 35 figures; compile errors corrected; notation errors in Eq.(30) and (31) corrected, typo error in Eq.(40) corrected, references and comments in footnote added
openalex publication_date 2003/08/01 · arxiv created 2004/03/07 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We investigate the spin polarization of τ± leptons produced in ντ and ντ nucleon scattering via charged currents. Quasi-elastic scattering, Δresonance production and deep inelastic scattering processes are studied. The polarization information is essential for measuring the τ± appearance rate in long baseline neutrino oscillation experiments, because the decay particle distributions depend crucially on the τ± spin. In this article, we calculate the spin density matrix of each process and estimate the spin polarization vector in medium and high neutrino energy interactions. We find that the produced τ±'s have high degree of polarization, and their spin direction depends non-trivially on the energy and the scattering angle of τ± in the laboratory frame.