@misc{10481/91940,
year = {2024},
month = {1},
url = {https://hdl.handle.net/10481/91940},
abstract = {We present the first search for heavy neutral leptons (HNLs) decaying into νe+e− or νπ0 final states in a liquid-argon time projection chamber using data collected with the MicroBooNE detector. The data were recorded synchronously with the NuMI neutrino beam from Fermilab’s main injector corresponding to a total exposure of 7.01 × 1020 protons on target. We set upper limits at the 90% confidence level on the mixing parameter |Uμ4|2 in the mass ranges 10 ≤ mHNL ≤ 150 MeV for the νe+e− channel and 150 ≤ mHNL ≤ 245 MeV for the νπ0 channel, assuming |Ue4|2 = |Uτ4|2 = 0. These limits represent the most stringent constraints in the mass range 35 < mHNL < 175 MeV and the first constraints from a direct search for νπ0 decays.},
organization = {The U.S. Department of Energy, Office of Science, Offices of High Energy Physics and Nuclear Physics},
organization = {The U.S. National Science Foundation},
organization = {The Swiss National Science Foundation; the Science and Technology Facilities Council (STFC), part of the United Kingdom Research and Innovation; the Royal Society (United Kingdom)},
organization = {The United Kingdom Research and Innovation (UKRI) Future Leaders Fellowship},
organization = {The NSF AI Institute for Artificial Intelligence and Fundamental Interactions},
publisher = {American Physical Society},
title = {Search for Heavy Neutral Leptons in Electron-Positron and Neutral-Pion Final States with the MicroBooNE Detector},
doi = {10.1103/PhysRevLett.132.041801},
author = {Abratenko, P. and García Gámez, Diego and MicroBooNE Collaboration, /},
}