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XXVIII International Workshop on Deep-Inelastic Scattering and Related Subjects, New York, United States Of America, 12 April 2021, (Full Text)
Tau neutrino is one of the least known particle of Standard Model; there are only few
measurements with a limited statistics. The DONUT experiment first reported the tau
neutrino interaction cross-section but their measurement suffers from large systematic
error of more than 50% which is mainly due to uncertainty in the tau neutrino flux
prediction. The tau neutrino cross section is an essential ingredient in neutrino experi-
ments and its precise measurement would enable a search for new physics effects such
as testing the Lepton Universality in neutrino interactions. The main goal of the DsTau
experiment is to measure an inclusive differential cross-section of a Ds production with a
consecutive decay to tau lepton in p-A interactions at the CERN-SPS. The measurement of
DsTau will reduce the systematic uncertainty in tau neutrino interaction cross-section to
10% level. The results from the pilot run and the prospect for physics runs in 2021-2022
will be discussed.