Detecting the (Quasi-)Two-Body Decays of $\tau$ Leptons in Short-Baseline Neutrino Oscillation Experiments

TL;DR

This paper proposes innovative detector schemes for next-generation short-baseline neutrino experiments to effectively identify tau lepton decays, focusing on good spectrometry and efficient reconstruction of decay modes.

Contribution

It introduces a novel detector design combining emulsion targets, magnetic fields, electronic trackers, and a lead glass calorimeter for improved tau decay detection.

Findings

Effective identification of tau (quasi-)two-body decays.

High efficiency in reconstructing electromagnetic showers.

Good performance in selecting electronic tau decays.

Abstract

Novel detector schemes are proposed for the short-baseline neutrino experiments of next generation, aimed at exploring the large-$\Delta m^2$ domain of \omutau oscillations in the appearance mode. These schemes emphasize good spectrometry for charged particles and for electromagnetic showers and efficient reconstruction of \ypi_gg decays. The basic elements are a sequence of relatively thin emulsion targets, immersed in magnetic field and interspersed with electronic trackers, and a fine-grained electromagnetic calorimeter built of lead glass. These elements act as an integral whole in reconstructing the electromagnetic showers. This conceptual scheme shows good performance in identifying the $\tau$ (quasi-)two-body decays by their characteristic kinematics and in selecting the electronic decays of the $\tau$.