Search for coherent elastic neutrino-nucleus scattering at a nuclear reactor with CONNIE 2019 data

The Coherent Neutrino-Nucleus Interaction Experiment (CONNIE) is taking data at the Angra 2 nuclear reactor with the aim of detecting the coherent elastic scattering of reactor antineutrinos with silicon nuclei using charge-coupled devices (CCDs). In 2019 the experiment operated with a hardware binn...

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Detalles Bibliográficos
Autores: The CONNIE collaboration, Aguilar Arevalo, Alexis, Bernal, Javier, Bertou, Xavier Pierre Louis, Bonifazi, Carla Brenda, Cancelo, Gustavo, de Carvalho, Victor G. P. B., Cervantes Vergara, Brenda A., Chavez, Claudio, Corrêa, Gustavo Coelho, D’Olivo, Juan C., dos Anjos, João C., Estrada, Juan, Fernandes Neto, Aldo R., Fernández Moroni, Guillermo, Foguel, Ana, Ford, Richard, Gasanego Barbuscio, Julián, Gonzalez Cuevas, Juan, Hernandez, Ester Susana, Izraelevitch, Federico Hernán, Kilminster, Ben, Kuk, Kevin, Lima, Herman P., Makler, Martín, Martinez Montero, Mauricio, Mendes, Larissa Helena, Molina, Jorge, Mota, Philipe, Nasteva, Irina, Paolini, Eduardo Emilio, Rodrigues Ferreira Maltez, Dario Pablo, Sarkis, Y., Sofo Haro, Miguel Francisco, Stalder, Diego, Tiffenberg, Javier Sebastian
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2022
País:Argentina
Institución:Consejo Nacional de Investigaciones Científicas y Técnicas
Repositorio:CONICET Digital (CONICET)
Idioma:inglés
OAI Identifier:oai:ri.conicet.gov.ar:11336/215650
Acceso en línea:http://hdl.handle.net/11336/215650
Access Level:acceso abierto
Palabra clave:NEUTRINO DETECTORS AND TELESCOPES (EXPERIMENTS)
https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
Descripción
Sumario:The Coherent Neutrino-Nucleus Interaction Experiment (CONNIE) is taking data at the Angra 2 nuclear reactor with the aim of detecting the coherent elastic scattering of reactor antineutrinos with silicon nuclei using charge-coupled devices (CCDs). In 2019 the experiment operated with a hardware binning applied to the readout stage, leading to lower levels of readout noise and improving the detection threshold down to 50 eV. The results of the analysis of 2019 data are reported here, corresponding to the detector array of 8 CCDs with a fiducial mass of 36.2 g and a total exposure of 2.2 kg-days. The difference between the reactor-on and reactor-off spectra shows no excess at low energies and yields upper limits at 95% confidence level for the neutrino interaction rates. In the lowest-energy range, 50 − 180 eV, the expected limit stands at 34 (39) times the standard model prediction, while the observed limit is 66 (75) times the standard model prediction with Sarkis (Chavarria) quenching factors. [Figure not available: see fulltext.]

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