# DsTau: Study of tau neutrino production with 400 GeV protons from the CERN-SPS

## TL;DR

The DsTau experiment at CERN SPS aims to directly measure tau neutrino production from high-energy proton interactions by detecting Ds meson decays using high-resolution emulsion detectors, demonstrating the feasibility of future detailed studies.

## Contribution

This study introduces a novel experimental approach to measure tau neutrino production via Ds meson decay using emulsion detectors, providing initial results that confirm the method's viability.

## Key findings

- Feasibility of using emulsion detectors for tau neutrino detection.
- Successful collection and analysis of test run data.
- Proof of concept for future detailed measurements.

## Abstract

In the DsTau experiment at the CERN SPS, an independent and direct way to measure tau neutrino production following high energy proton interactions was proposed. As the main source of tau neutrinos is a decay of Ds mesons, produced in proton-nucleus interactions, the project aims at measuring a differential cross section of this reaction. The experimental method is based on a use of high resolution emulsion detectors for effective registration of events with short lived particle decays. Here we present the motivation of the study, details of the experimental technique, and the first results of the analysis of the data collected during test runs, which prove feasibility of the full scale study of the process in future.