@article{cc79de2cb3154b758926c07c8748c8bd,
title = "Demonstration of the event identification capabilities of the NEXT-White detector",
abstract = "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. [Figure not available: see fulltext.]",
keywords = "Dark Matter and Double Beta Decay (experiments)",
author = "{The NEXT collaboration} and P. Ferrario and Benlloch-Rodr{\'i}guez, {J. M.} and {D{\'i}az L{\'o}pez}, G. and {Hernando Morata}, {J. A.} and M. Kekic and J. Renner and A. Us{\'o}n and G{\'o}mez-Cadenas, {J. J.} and C. Adams and V. {\'A}lvarez and L. Arazi and Arnquist, {I. J.} and Azevedo, {C. D.R.} and K. Bailey and F. Ballester and Borges, {F. I.G.M.} and N. Byrnes and S. C{\'a}rcel and Carri{\'o}n, {J. V.} and S. Cebr{\'i}an and E. Church and Conde, {C. A.N.} and T. Contreras and J. D{\'i}az and M. Diesburg and J. Escada and R. Esteve and R. Felkai and Fernandes, {A. F.M.} and Fernandes, {L. M.P.} and Ferreira, {A. L.} and Freitas, {E. D.C.} and J. Generowicz and S. Ghosh and A. Goldschmidt and D. Gonz{\'a}lez-D{\'i}az and R. Guenette and Gut{\'i}errez, {R. M.} and J. Haefner and K. Hafidi and J. Hauptman and Henriques, {C. A.O.} and P. Herrero and V. Herrero and Y. Ifergan and S. Johnston and Jones, {B. J.P.} and L. Labarga and A. Laing and M. Losada",
note = "Funding Information: This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited Publisher Copyright: {\textcopyright} 2019, The Author(s).",
year = "2019",
month = oct,
day = "1",
doi = "10.1007/JHEP10(2019)052",
language = "English (US)",
volume = "2019",
journal = "Journal of High Energy Physics",
issn = "1126-6708",
publisher = "Springer Verlag",
number = "10",
}