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Title: Exploring low-energy neutrino physics with the Coherent Neutrino Nucleus Interaction Experiment

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 ($$\mathrm{CE}\mathcal{ν}\mathrm{NS}$$) of reactor antineutrinos with silicon nuclei and testing nonstandard neutrino interactions (NSI). We report here the first results of the detector array deployed in 2016, considering an active mass 47.6 g (eight 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 the 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 low-energy neutrino physics, allowing one to explore for the first time the energies accessible through the low threshold of CCDs. Finally, they will lead to new constraints on NSI from the $$\mathrm{CE}\mathcal{ν}\mathrm{NS}$$ of antineutrinos from nuclear reactors.

Authors:
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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 Collaboration
OSTI Identifier:
1556979
Report Number(s):
arXiv:1906.02200; FERMILAB-PUB-19-302-CD-PPD
Journal ID: ISSN 2470-0010; PRVDAQ; oai:inspirehep.net:1738655
Grant/Contract Number:  
AC02-07CH11359
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review D
Additional Journal Information:
Journal Volume: 100; Journal Issue: 9; Journal ID: ISSN 2470-0010
Publisher:
American Physical Society (APS)
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, Bertou, Xavier, Bonifazi, Carla, Cancelo, Gustavo, Castañeda, Alejandro, Cervantes Vergara, Brenda, Chavez, Claudio, D’Olivo, Juan C., dos Anjos, João C., Estrada, Juan, Fernandes Neto, Aldo R., Fernandez Moroni, Guillermo, Foguel, Ana, Ford, Richard, Gonzalez Cuevas, Juan, Hernández, Pamela, Hernandez, Susana, Izraelevitch, Federico, Kavner, Alexander R., Kilminster, Ben, Kuk, Kevin, Lima, H. P., Makler, Martin, Molina, Jorge, Mota, Philipe, Nasteva, Irina, Paolini, Eduardo E., Romero, Carlos, Sarkis, Y., Sofo Haro, Miguel, Souza, Iruatã M. S., Tiffenberg, Javier, and Wagner, Stefan. Exploring low-energy neutrino physics with the Coherent Neutrino Nucleus Interaction Experiment. United States: N. p., 2019. Web. doi:10.1103/PhysRevD.100.092005.
Aguilar-Arevalo, Alexis, Bertou, Xavier, Bonifazi, Carla, Cancelo, Gustavo, Castañeda, Alejandro, Cervantes Vergara, Brenda, Chavez, Claudio, D’Olivo, Juan C., dos Anjos, João C., Estrada, Juan, Fernandes Neto, Aldo R., Fernandez Moroni, Guillermo, Foguel, Ana, Ford, Richard, Gonzalez Cuevas, Juan, Hernández, Pamela, Hernandez, Susana, Izraelevitch, Federico, Kavner, Alexander R., Kilminster, Ben, Kuk, Kevin, Lima, H. P., Makler, Martin, Molina, Jorge, Mota, Philipe, Nasteva, Irina, Paolini, Eduardo E., Romero, Carlos, Sarkis, Y., Sofo Haro, Miguel, Souza, Iruatã M. S., Tiffenberg, Javier, & Wagner, Stefan. Exploring low-energy neutrino physics with the Coherent Neutrino Nucleus Interaction Experiment. United States. doi:10.1103/PhysRevD.100.092005.
Aguilar-Arevalo, Alexis, Bertou, Xavier, Bonifazi, Carla, Cancelo, Gustavo, Castañeda, Alejandro, Cervantes Vergara, Brenda, Chavez, Claudio, D’Olivo, Juan C., dos Anjos, João C., Estrada, Juan, Fernandes Neto, Aldo R., Fernandez Moroni, Guillermo, Foguel, Ana, Ford, Richard, Gonzalez Cuevas, Juan, Hernández, Pamela, Hernandez, Susana, Izraelevitch, Federico, Kavner, Alexander R., Kilminster, Ben, Kuk, Kevin, Lima, H. P., Makler, Martin, Molina, Jorge, Mota, Philipe, Nasteva, Irina, Paolini, Eduardo E., Romero, Carlos, Sarkis, Y., Sofo Haro, Miguel, Souza, Iruatã M. S., Tiffenberg, Javier, and Wagner, Stefan. Wed . "Exploring low-energy neutrino physics with the Coherent Neutrino Nucleus Interaction Experiment". United States. doi:10.1103/PhysRevD.100.092005.
@article{osti_1556979,
title = {Exploring low-energy neutrino physics with the Coherent Neutrino Nucleus Interaction Experiment},
author = {Aguilar-Arevalo, Alexis and Bertou, Xavier and Bonifazi, Carla and Cancelo, Gustavo and Castañeda, Alejandro and Cervantes Vergara, Brenda and Chavez, Claudio and D’Olivo, Juan C. and dos Anjos, João C. and Estrada, Juan and Fernandes Neto, Aldo R. and Fernandez Moroni, Guillermo and Foguel, Ana and Ford, Richard and Gonzalez Cuevas, Juan and Hernández, Pamela and Hernandez, Susana and Izraelevitch, Federico and Kavner, Alexander R. and Kilminster, Ben and Kuk, Kevin and Lima, H. P. and Makler, Martin and Molina, Jorge and Mota, Philipe and Nasteva, Irina and Paolini, Eduardo E. and Romero, Carlos and Sarkis, Y. and Sofo Haro, Miguel and Souza, Iruatã M. S. and Tiffenberg, Javier and Wagner, Stefan},
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 ($\mathrm{CE}\mathcal{ν}\mathrm{NS}$) of reactor antineutrinos with silicon nuclei and testing nonstandard neutrino interactions (NSI). We report here the first results of the detector array deployed in 2016, considering an active mass 47.6 g (eight 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 the 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 low-energy neutrino physics, allowing one to explore for the first time the energies accessible through the low threshold of CCDs. Finally, they will lead to new constraints on NSI from the $\mathrm{CE}\mathcal{ν}\mathrm{NS}$ of antineutrinos from nuclear reactors.},
doi = {10.1103/PhysRevD.100.092005},
journal = {Physical Review D},
number = 9,
volume = 100,
place = {United States},
year = {2019},
month = {11}
}

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