PoS - Proceedings of Science
Volume 364 - European Physical Society Conference on High Energy Physics (EPS-HEP2019) - Neutrino Physics
DsTau (NA65): Study of tau-neutrino production at the CERN SPS
T. Ariga* on behalf of the DsTau Collaboration
*corresponding author
Full text: Not available
DsTau is an experiment at the CERN SPS, approved by CERN in June 2019 as NA65, to study tau-neutrino production aiming at providing important data for future $\nu_\tau$ studies. A precise measurement of the $\nu_\tau$ cross section would enable a search for new physics effects in $\nu_\tau$ CC interactions. It also has practical importance for the next generation experiments for neutrino oscillation studies and astrophysical $\nu_\tau$ observations. The practical way of producing a $\nu_\tau$ beam is by the sequential decay of $D_s$ mesons produced in high-energy proton interactions. However, there is no experimental measurement of the $D_s$ differential production cross section in fixed target experiments using proton beams, which leads to a large systematic uncertainty on the $\nu_\tau$ flux estimation. The DsTau experiment aims to reduce the systematic uncertainty in the current $\nu_\tau$ cross section measurement to 10\% or below, by measuring the $D_s$ differential production cross section (especially longitudinal dependence). For this purpose, emulsion detectors with a spatial resolution of 50 nm will be used allowing the detection of $D_s \rightarrow \tau \rightarrow X$ double kinks in a few mm range. During the physics runs, 2.3$\times$10$^8$ proton interactions will be collected in the tungsten target, and 1000 $D_s \rightarrow \tau$ decays will be detected. In addition to the primary aim of studying tau-neutrino production, the analysis of $\mathcal{O}(10^5)$ charmed particle pairs can provide valuable by-products such as a measurement of the intrinsic charm content in proton and the interaction cross-section of charmed hadrons. Results from the test runs and the pilot run will be presented together with a prospect for the physics runs in 2021 and 2022.
How to cite

Metadata are provided both in "article" format (very similar to INSPIRE) as this helps creating very compact bibliographies which can be beneficial to authors and readers, and in "proceeding" format which is more detailed and complete.

Open Access
Creative Commons LicenseCopyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.