Selection of $\Lambda^0$ Production Events in MicroBooNE
None None, USDOE Office of Science (SC), High Energy Physics (HEP) · 2021
A selection to find Cabibbo suppressed Λ production events, νµ + Ar → µ + + Λ 0 + X, in the MicroBooNE detector is described.This channel is sensitive to cross section and final state interaction parameters in different ways and can help break their degeneracy.Λ 0 production events are distinguished from background by the existence of a secondary vertex created when the Λ 0 decays.The selection examines a list of reconstructed particles thought to be the result of a neutrino interaction, first finding a muon candidate, then a proton and π -candidate and testing their consistency with a Λ 0 → p + π -decay.The selection achieves an efficiency of approximately 7% while rejecting 99.9999% of the background.This selection is designed to study neutrino interactions in the NuMI flux.After applying the selection, Monte Carlo simulation predicts 9.0 ± 0.8 (MC stat.)signal and 3.1 ± 1.4 background events when combining 1.0 × 10 21 protons on target of neutrino mode flux and 1.3 × 10 21 protons on target of anti-neutrino mode flux, corresponding to a significance of 2.6 σ.This document was prepared by MicroBooNE Collaboration as a result of the use of facilities of the U.S. Department of Energy (DOE), which are managed by Fermi Research Alliance, LLC (FRA), acting under Contract No. DE�AC02-07CH11359.Neither FRA, DOE, the U.S. Government, nor any person acting on their behalf: (a) make any warranty or representation, express or implied, with respect to the information contained in this document; or (b) assume any liabilities with respect to the use of, or damages resulting from the use of any information contained in the document.