PoS - Proceedings of Science
Volume 414 - 41st International Conference on High Energy physics (ICHEP2022) - Poster Session
Sensitivity to Heavy Neutral Leptons with the SAND detector at the DUNE ND complex
Z. Ghorbanimoghaddam* and  On behalf of the DUNE Collaboration
Full text: pdf
Pre-published on: October 27, 2022
Published on: June 15, 2023
A study has been performed within the framework of the multi-instrument DUNE near detector complex, specifically regarding the on-Axis System, to assess the sensitivity to heavy neutral lepton within six years of exposure.
By utilizing two MC generators, and charmed heavy meson decay channels, the sensitivity to heavy neutral lepton masses between 0.3 and 1.8 GeV/$c^2$ has been explored. A Mad-Graph/Mad-Dump model has been implemented based on the Neutrino Minimally extended Standard Model Lagrangian, and used to obtain accurate kinematics for the decay of mesons and heavy neutral lepton.
The simulated final-state particles have been propagated through the detector; a track reconstruction algorithm, based on the Kalman Filter technique, along with a simple two-body decay selection, is implemented to estimate efficiency and background rejection.
The heavy neutral lepton sensitivity has been estimated both from purely phenomenological as well as experimental point of view, reaching O($10^{-9}$) for higher masses, with about a factor 3 deterioration between the phenomenological and the experimental case.
In this paper, the results for direct and indirect decay channels of charmed meson $D_s$ to heavy neutral lepton has been investigated and the potential for further improvements has been discussed.
DOI: https://doi.org/10.22323/1.414.1007
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