학술논문
Measurement of the ${}^{136}$Xe two-neutrino double beta decay half-life via direct background subtraction in NEXT
Document Type
Working Paper
Author
NEXT Collaboration; Novella, P.; Sorel, M.; Usón, A.; Adams, C.; Almazán, H.; Álvarez, V.; Aparicio, B.; Aranburu, A. I.; Arazi, L.; Arnquist, I. J.; Ayet, S.; Azevedo, C. D. R.; Bailey, K.; Ballester, F.; Benlloch-Rodríguez, J. M.; Borges, F. I. G. M.; Bounasser, S.; Byrnes, N.; Cárcel, S.; Carrión, J. V.; Cebrián, S.; Church, E.; Conde, C. A. N.; Contreras, T.; Cossío, F. P.; Denisenko, A. A.; Díaz, G.; Díaz, J.; Dickel, T.; Escada, J.; Esteve, R.; Fahs, A.; Felkai, R.; Fernandes, L. M. P.; Ferrario, P.; Ferreira, A. L.; Foss, F. W.; Freitas, E. D. C.; Freixa, Z.; Generowicz, J.; Goldschmidt, A.; Gómez-Cadenas, J. J.; González, R.; González-Díaz, D.; Guenette, R.; Gutiérrez, R. M.; Haefner, J.; Hafidi, K.; Hauptman, J.; Henriques, C. A. O.; Morata, J. A. Hernando; Herrero-Gómez, P.; Herrero, V.; Ho, J.; Ifergan, Y.; Jones, B. J. P.; Kekic, M.; Labarga, L.; Laing, A.; Larizgoitia, L.; Lebrun, P.; Gutierrez, D. Lopez; López-March, N.; Losada, M.; Mano, R. D. P.; Martín-Albo, J.; Martínez, A.; Martínez-Lema, G.; Martínez-Vara, M.; McDonald, A. D.; Meziani, Z. E.; Mistry, K.; Monrabal, F.; Monteiro, C. M. B.; Mora, F. J.; Vidal, J. Muñoz; Navarro, K.; Nygren, D. R.; Oblak, E.; Odriozola-Gimeno, M.; Palmeiro, B.; Para, A.; Pérez, J.; Querol, M.; Raymond, A.; Redwine, A. B.; Renner, J.; Ripoll, L.; Rivilla, I.; García, Y. Rodríguez; Rodríguez, J.; Rogero, C.; Rogers, L.; Romeo, B.; Romo-Luque, C.; Santos, F. P.; Santos, J. M. F. dos; Simón, A.; Stanford, C.; Teixeira, J. M. R.; Thapa, P.; Toledo, J. F.; Torrent, J.; Veloso, J. F. C. A.; Vuong, T. T.; Webb, R.; White, J. T.; Woodruff, K.; Yahlali, N.
Source
Phys. Rev. C 105, 055501 (2022)
Subject
Language
Abstract
We report a measurement of the half-life of the ${}^{136}$Xe two-neutrino double beta decay performed with a novel direct background subtraction technique. The analysis relies on the data collected with the NEXT-White detector operated with ${}^{136}$Xe-enriched and ${}^{136}$Xe-depleted xenon, as well as on the topology of double-electron tracks. With a fiducial mass of only 3.5 kg of Xe, a half-life of $2.34^{+0.80}_{-0.46}\textrm{(stat)}^{+0.30}_{-0.17}\textrm{(sys)}\times10^{21}~\textrm{yr}$ is derived from the background-subtracted energy spectrum. The presented technique demonstrates the feasibility of unique background-model-independent neutrinoless double beta decay searches.
Comment: 9 pages, 7 figures, and 1 appendix
Comment: 9 pages, 7 figures, and 1 appendix