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Title: Exploring Low-Energy Neutrino Physics with the Coherent Neutrino Nucleus Interaction Experiment (CONNIE)

Abstract

The Coherent Neutrino-Nucleus Interaction Experiment (CONNIE) uses low-noise fully depleted charge-coupled devices (CCDs) with the goal of measuring low-energy recoils from coherent elastic scattering (CE$$\nu$$NS) of reactor antineutrinos with silicon nuclei. This standard model process has not yet been observed at recoil energies below 20 keV. We report here the first results of the detector array deployed in 2016, with an active mass of 73.2 g (12 CCDs), which is operating at a distance of 30 m from the core of the Angra 2 nuclear reactor, with a thermal power of 3.8 GW. A search for neutrino events is performed by comparing data collected with reactor on (2.1 kg-day) and reactor off (1.6 kg-day). The results show no excess in the reactor-on data, reaching the world record sensitivity down to recoil energies of about 1 keV (0.1 keV electron-equivalent). A 95% confidence level limit for new physics is established at an event rate of 40 times the one expected from the standard model at this energy scale. The results presented here provide a new window to the low-energy neutrino physics, which allows one to explore for the first time the lowest energies accessible through the CE$$\nu$$NS with antineutrinos from nuclear reactors.

Authors:
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Contributing Org.:
CONNIE
OSTI Identifier:
1556979
Report Number(s):
arXiv:1906.02200; FERMILAB-PUB-19-302-CD-PPD
1738655
DOE Contract Number:  
AC02-07CH11359
Resource Type:
Journal Article
Journal Name:
TBD
Additional Journal Information:
Journal Name: TBD
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Aguilar-Arevalo, Alexis, and et al. Exploring Low-Energy Neutrino Physics with the Coherent Neutrino Nucleus Interaction Experiment (CONNIE). United States: N. p., 2019. Web.
Aguilar-Arevalo, Alexis, & et al. Exploring Low-Energy Neutrino Physics with the Coherent Neutrino Nucleus Interaction Experiment (CONNIE). United States.
Aguilar-Arevalo, Alexis, and et al. Wed . "Exploring Low-Energy Neutrino Physics with the Coherent Neutrino Nucleus Interaction Experiment (CONNIE)". United States. https://www.osti.gov/servlets/purl/1556979.
@article{osti_1556979,
title = {Exploring Low-Energy Neutrino Physics with the Coherent Neutrino Nucleus Interaction Experiment (CONNIE)},
author = {Aguilar-Arevalo, Alexis and et al.},
abstractNote = {The Coherent Neutrino-Nucleus Interaction Experiment (CONNIE) uses low-noise fully depleted charge-coupled devices (CCDs) with the goal of measuring low-energy recoils from coherent elastic scattering (CE$\nu$NS) of reactor antineutrinos with silicon nuclei. This standard model process has not yet been observed at recoil energies below 20 keV. We report here the first results of the detector array deployed in 2016, with an active mass of 73.2 g (12 CCDs), which is operating at a distance of 30 m from the core of the Angra 2 nuclear reactor, with a thermal power of 3.8 GW. A search for neutrino events is performed by comparing data collected with reactor on (2.1 kg-day) and reactor off (1.6 kg-day). The results show no excess in the reactor-on data, reaching the world record sensitivity down to recoil energies of about 1 keV (0.1 keV electron-equivalent). A 95% confidence level limit for new physics is established at an event rate of 40 times the one expected from the standard model at this energy scale. The results presented here provide a new window to the low-energy neutrino physics, which allows one to explore for the first time the lowest energies accessible through the CE$\nu$NS with antineutrinos from nuclear reactors.},
doi = {},
journal = {TBD},
number = ,
volume = ,
place = {United States},
year = {2019},
month = {6}
}