Demonstration of the event identification capabilities of the NEXT-White detector

In experiments searching for neutrinoless double-beta decay, the possibility of identifying the two emitted electrons is a powerful tool in rejecting background events and therefore improving the overall sensitivity of the experiment. In this paper we present the first measurement of the efficiency...

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Detalhes bibliográficos
Autores: Ferrario, Paola, Benlloch Rodríguez, J.M., Díaz López, G., Hernando Morata, J.A., Kekic, M., Renner, Joshua, Usón, A., Gómez Cadenas, Juan José, Adams, C., Álvarez Puerta, Vicente, Arazi, L., Arnquist, I.J., Azevedo, C.D.R., Bailey, K., Ballester Merelo, Francisco José, Borges, Filipa I.G.M., Byrnes, N., Cárcel García, Sara, Carrión, J.V., Cebrián, Susana, Church, E., Conde, Carlos A.N., Contreras, T., Díaz Medina, José, Diesburg, M., Escada, J., Esteve, Raúl, Felkai, R., Fernandes, A.F.M., Fernandes, L.M.P., Ferreira, Antonio Luis, Freitas, Elisabete D.C., Generowicz, J., Ghosh, S., Goldschmidt, Azriel, González-Díaz, Diego, Guenette, R., Gutiérrez, Rafael María, Haefner, J., Hafidi, K., Hauptman, John M., Henriques, C.A.O., Herrero i Viñas, Pau, Herrero, Vicente, Ifergan, Y., Johnston, S., Jones, Benjamin J.P., Labarga, Luis A., Laing, Andrew, Lebrun, P., López-March, N., Losada, Marta, Mano, R.D.P., Martín-Albo Simón, Justo, Martínez Pérez, Alberto, Martínez Lema, Gonzalo, McDonald, Alison D., Monrabal Capilla, Francesc, Monteiro, Cristina M.B., Mora, Francisco José, Muñoz Vidal, J., Novella, P., Nygren, David R., Palmeiro, B., Para, A., Pérez, Javier Martin, Psihas, F., Querol, M., Repond, J., Riordan, S., Ripoll Masferrer, Lluís, Rodríguez García, Y., Rodríguez Samaniego, Javier, Rogers, L., Romeo, B., Romo-Luque, C., Santos, Filomena P., dos Santos, Joaquim M.F., Simón Estévez, Ander, Sofka, C., Sorel, Michel, Stiegler, T., Toledo, J.F., Torrent Collell, Jordi, Veloso, João F.C.A., Webb, R.C., Weiss-Babai, R., White, James T., Woodruff, K., Yahlali Haddou, Nadia
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2019
País:España
Recursos:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repositorio:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:recercat.cat:10256/18118
Acesso em linha:http://hdl.handle.net/10256/18118
Access Level:acceso abierto
Palavra-chave:Calibratge
Calibration
Detectors
Física -- Mesuraments
Physical measurements
Descrição
Resumo:In experiments searching for neutrinoless double-beta decay, the possibility of identifying the two emitted electrons is a powerful tool in rejecting background events and therefore improving the overall sensitivity of the experiment. In this paper we present the first measurement of the efficiency of a cut based on the different event signatures of double and single electron tracks, using the data of the NEXT-White detector, the first detector of the NEXT experiment operating underground. Using a 228Th calibration source to produce signal-like and background-like events with energies near 1.6 MeV, a signal efficiency of 71.6 ± 1.5 stat± 0.3 sys% for a background acceptance of 20.6 ± 0.4 stat± 0.3 sys% is found, in good agreement with Monte Carlo simulations. An extrapolation to the energy region of the neutrinoless double beta decay by means of Monte Carlo simulations is also carried out, and the results obtained show an improvement in background rejection over those obtained at lower energies.

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