Contribution Poster accelerator
Study of tau-neutrino production at the CERN SPS
for the DsTau collaboration
Session and Location
Wednesday Session, Poster Wall #38 (Auditorium Gallery Right)
At the CERN SPS, the DsTau project has been proposed to study tau-neutrino production aiming at providing important information for future $\nu_\tau$ measurements. Precise measurement of the $\nu_\tau$ charged-current cross section would enable a search for new physics effects in $\nu_\tau$-nucleon CC interactions. The source of $\nu_\tau$ is the sequential decay of $D_s$ mesons produced by proton interactions, whose uncertainty dominates current uncertainty in the $\nu_\tau$ cross section measurement. The project aims at reducing the uncertainty from about 50% to 10% by measuring the $D_s$ differential production cross section. For this purpose, emulsion detectors with a position resolution of 50 nm will be used to detect double kinks of $D_s \rightarrow \tau \rightarrow X$ decays in a few mm range. Results from the beam tests in 2016-2017 will be presented together with a prospect for a pilot run in 2018 and a physics run in 2021.
Poster included in proceedings: