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Sensitivity of NEXT-100 to neutrinoless double beta decay

  • Author(s): Martín-Albo, J
  • Muñoz Vidal, J
  • Ferrario, P
  • Nebot-Guinot, M
  • Gómez-Cadenas, JJ
  • Álvarez, V
  • Azevedo, CDR
  • Borges, FIG
  • Cárcel, S
  • Carrión, JV
  • Cebrián, S
  • Cervera, A
  • Conde, CAN
  • Díaz, J
  • Diesburg, M
  • Esteve, R
  • Fernandes, LMP
  • Ferreira, AL
  • Freitas, EDC
  • Goldschmidt, A
  • González-Díaz, D
  • Gutiérrez, RM
  • Hauptman, J
  • Henriques, CAO
  • Hernando Morata, JA
  • Herrero, V
  • Labarga, L
  • Laing, A
  • Lebrun, P
  • Liubarsky, I
  • López-March, N
  • Lorca, D
  • Losada, M
  • Martínez-Lema, G
  • Martínez, A
  • Monrabal, F
  • Monteiro, CMB
  • Mora, FJ
  • Moutinho, LM
  • Novella, P
  • Nygren, D
  • Palmeiro, B
  • Para, A
  • Querol, M
  • Renner, J
  • Ripoll, L
  • Rodríguez, J
  • Santos, FP
  • dos Santos, JMF
  • Serra, L
  • Shuman, D
  • Simón, A
  • Sofka, C
  • Sorel, M
  • Stiegler, T
  • Toledo, JF
  • Torrent, J
  • Tsamalaidze, Z
  • Veloso, JFCA
  • Webb, R
  • White, JT
  • Yahlali, N
  • Yepes-Ramírez, H
  • et al.
Abstract

© 2016, The Author(s). Abstract: NEXT-100 is an electroluminescent high-pressure xenon gas time projection chamber that will search for the neutrinoless double beta (0νββ) decay of 136Xe. The detector possesses two features of great value for 0νββ searches: energy resolution better than 1% FWHM at the Q value of 136Xe and track reconstruction for the discrimination of signal and background events. This combination results in excellent sensitivity, as discussed in this paper. Material-screening measurements and a detailed Monte Carlo detector simulation predict a background rate for NEXT-100 of at most 4 × 10−4 counts keV−1 kg−1 yr−1. Accordingly, the detector will reach a sensitivity to the 0νββ-decay half-life of 2.8 × 1025 years (90% CL) for an exposure of 100 kg·year, or 6.0 × 1025 years after a run of 3 effective years.[Figure not available: see fulltext.]

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