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Title: First observation of low energy electron neutrinos in a liquid argon time projection chamber

Abstract

The capabilities of liquid argon time projection chambers (LArTPCs) to reconstruct the spatial and calorimetric information of neutrino events have made them the detectors of choice in a number of experiments, specically those looking to observe electron neutrino (e) appearance. The LArTPC promises excellent background rejection capabilities, especially in this \golden" channel for both short and long baseline neutrino oscillation experiments. We present the rst experimental observation of electron neutrinos and anti-neutrinos in the ArgoNeut LArTPC, in the energy range relevant to DUNE and the Fermilab Short Baseline Neutrino Program. We have selected 37 electron candidate events and 274 gamma candidate events, and measured an 80% purity of electrons based on a topological selection. Additionally, we present a of separation of electrons from gammas using calorimetric energy deposition, demonstrating further separation of electrons from background gammas.

Authors:
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Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
Contributing Org.:
ArgoNeuT Collaboration
OSTI Identifier:
1361948
Report Number(s):
PNNL-SA-126393
Journal ID: ISSN 2470-0010
DOE Contract Number:
AC05-76RL01830
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review D; Journal Volume: 95; Journal Issue: 7
Country of Publication:
United States
Language:
English

Citation Formats

Acciarri, R., Adams, C., Asaadi, J., Baller, B., Bolton, T., Bromberg, C., Cavanna, F., Church, E., Edmunds, D., Ereditato, A., Farooq, S., Fitzpatrick, R. S., Fleming, B., Hackenburg, A., Horton-Smith, G., James, C., Lang, K., Luo, X., Mehdiyev, R., Page, B., Palamara, O., Rebel, B., Schukraft, A., Scanavini, G., Soderberg, M., Spitz, J., Szelc, A. M., Weber, M., Yang, T., and Zeller, G. P. First observation of low energy electron neutrinos in a liquid argon time projection chamber. United States: N. p., 2017. Web. doi:10.1103/PhysRevD.95.072005.
Acciarri, R., Adams, C., Asaadi, J., Baller, B., Bolton, T., Bromberg, C., Cavanna, F., Church, E., Edmunds, D., Ereditato, A., Farooq, S., Fitzpatrick, R. S., Fleming, B., Hackenburg, A., Horton-Smith, G., James, C., Lang, K., Luo, X., Mehdiyev, R., Page, B., Palamara, O., Rebel, B., Schukraft, A., Scanavini, G., Soderberg, M., Spitz, J., Szelc, A. M., Weber, M., Yang, T., & Zeller, G. P. First observation of low energy electron neutrinos in a liquid argon time projection chamber. United States. doi:10.1103/PhysRevD.95.072005.
Acciarri, R., Adams, C., Asaadi, J., Baller, B., Bolton, T., Bromberg, C., Cavanna, F., Church, E., Edmunds, D., Ereditato, A., Farooq, S., Fitzpatrick, R. S., Fleming, B., Hackenburg, A., Horton-Smith, G., James, C., Lang, K., Luo, X., Mehdiyev, R., Page, B., Palamara, O., Rebel, B., Schukraft, A., Scanavini, G., Soderberg, M., Spitz, J., Szelc, A. M., Weber, M., Yang, T., and Zeller, G. P. Sat . "First observation of low energy electron neutrinos in a liquid argon time projection chamber". United States. doi:10.1103/PhysRevD.95.072005.
@article{osti_1361948,
title = {First observation of low energy electron neutrinos in a liquid argon time projection chamber},
author = {Acciarri, R. and Adams, C. and Asaadi, J. and Baller, B. and Bolton, T. and Bromberg, C. and Cavanna, F. and Church, E. and Edmunds, D. and Ereditato, A. and Farooq, S. and Fitzpatrick, R. S. and Fleming, B. and Hackenburg, A. and Horton-Smith, G. and James, C. and Lang, K. and Luo, X. and Mehdiyev, R. and Page, B. and Palamara, O. and Rebel, B. and Schukraft, A. and Scanavini, G. and Soderberg, M. and Spitz, J. and Szelc, A. M. and Weber, M. and Yang, T. and Zeller, G. P.},
abstractNote = {The capabilities of liquid argon time projection chambers (LArTPCs) to reconstruct the spatial and calorimetric information of neutrino events have made them the detectors of choice in a number of experiments, specically those looking to observe electron neutrino (e) appearance. The LArTPC promises excellent background rejection capabilities, especially in this \golden" channel for both short and long baseline neutrino oscillation experiments. We present the rst experimental observation of electron neutrinos and anti-neutrinos in the ArgoNeut LArTPC, in the energy range relevant to DUNE and the Fermilab Short Baseline Neutrino Program. We have selected 37 electron candidate events and 274 gamma candidate events, and measured an 80% purity of electrons based on a topological selection. Additionally, we present a of separation of electrons from gammas using calorimetric energy deposition, demonstrating further separation of electrons from background gammas.},
doi = {10.1103/PhysRevD.95.072005},
journal = {Physical Review D},
number = 7,
volume = 95,
place = {United States},
year = {Sat Apr 01 00:00:00 EDT 2017},
month = {Sat Apr 01 00:00:00 EDT 2017}
}
  • Liquid argon time projection chambers (LArTPCs) produce remarkable fidelity in the observation of neutrino interactions. The superior capabilities of such detectors to reconstruct the spatial and calorimetric information of neutrino events have made them the detectors of choice in a number of experiments, specifically those looking to observe electron neutrino (more » $$\nu_e$$) appearance. The LArTPC promises excellent background rejection capabilities, especially in this "golden" channel for both short and long baseline neutrino oscillation experiments. We present the first experimental observation of electron neutrinos and anti-neutrinos in the ArgoNeut LArTPC, in the energy range relevant to DUNE and the Fermilab Short Baseline Neutrino Program. Additionally, we present a demonstration of separation of electrons from gammas using neutrino data.« less
  • Cited by 3
  • Electron neutrino appearance is the signature channel to address the most pressing questions in neutrino oscillations physics, at both long and short baselines. This includes the search for CP violation in the neutrino sector, which the U.S. flagship neutrino experiment DUNE will address. In addition, the Short Baseline Neutrino Program at Fermilab (MicroBooNE, SBND, ICARUS-T600) searches for new physics, such as sterile neutrinos, through electron neutrino appearance. Liquid argon time projection chambers are the forefront of neutrino detection technology, and the detector of choice for both short and long baseline neutrino oscillation experiments. This work presents the first experimental observationmore » and study of electron neutrinos in the 1-10 GeV range, the essential oscillation energy regime for the above experiments. The systematic uncertainties for an electron neutrino appearance search for the Fermilab Short Baseline Neutrino Program are carefully quantified, and the characterization of separation between electrons and high energy photons is examined.« less
  • The Argon Dark Matter (ArDM) experiment consists of a liquid argon (LAr) time projection chamber (TPC) sensitive to nuclear recoils, resulting from scattering of hypothetical Weakly Interacting Massive Particles (WIMPs) on argon targets. With an active target mass of 850 kg ArDM represents an important milestone towards developments for large LAr Dark Matter detectors. Here we present the experimental apparatus currently installed underground at the Laboratorio Subterráneo de Canfranc (LSC), Spain. We show data on gaseous or liquid argon targets recorded in 2015 during the commissioning of ArDM in single phase at zero E-field (ArDM Run I). The data confirmsmore » the overall good and stable performance of the ArDM tonne-scale LAr detector.« less