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

6533b81ffe1ef96bd127738a

RESEARCH PRODUCT

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

Next Collaboration P. Ferrario J. M. Benlloch-rodríguez G. Díaz López J. A. Hernando Morata M. Kekic J. Renner A. Usón J. J. Gómez-cadenas C. Adams V. ÁLvarez L. Arazi I. J. Arnquist C. D. R Azevedo K. Bailey F. Ballester F. I. G. M. Borges N. Byrnes S. Cárcel J. V. Carrión S. Cebrián E. Church C. A. N. Conde T. Contreras J. Díaz M. Diesburg J. Escada R. Esteve R. Felkai A. F. M. Fernandes L. M. P. Fernandes A. L. Ferreira E. D. C. Freitas J. Generowicz S. Ghosh A. Goldschmidt D. González-díaz R. Guenette R. M. Gutiérrez J. Haefner K. Hafidi J. Hauptman C. A. O. Henriques P. Herrero V. Herrero Y. Ifergan S. Johnston B. J. P. Jones L. Labarga A. Laing P. Lebrun N. López-march M. Losada R. D. P. Mano J. Martín-albo A. Martínez G. Martínez-lema A. D. Mcdonald F. Monrabal C. M. B. Monteiro F. J. Mora J. Muñoz Vidal P. Novella D. R. Nygren B. Palmeiro A. Para J. Pérez F. Psihas M. Querol J. Repond S. Riordan L. Ripoll Y. Rodríguez García J. Rodríguez L. Rogers B. Romeo C. Romo-luque F. P. Santos J. M. F. Dos Santos A. Simón C. Sofka M. Sorel T. Stiegler J. F. Toledo J. Torrent J. F. C. A. Veloso R. Webb R. Weiss-babai J. T. White K. Woodruff N. Yahlali

subject

Nuclear and High Energy Physics Physical measurements Physics - Instrumentation and Detectors Monte Carlo method Extrapolation Física -- Mesuraments FOS: Physical sciences 7. Clean energy 01 natural sciences Atomic Mathematical Sciences High Energy Physics - Experiment Nuclear physics TECNOLOGIA ELECTRONICA High Energy Physics - Experiment (hep-ex)Particle and Plasma Physics Double beta decay 0103 physical sciences Dark Matter and Double Beta Decay (experiments)Calibration lcsh:Nuclear and particle physics. Atomic energy. Radioactivity Nuclear Calibratge 010306 general physics Nuclear Experiment Mathematical Physics Physics Quantum Physics 010308 nuclear & particles physics Detector Molecular Detectors Instrumentation and Detectors (physics.ins-det)Nuclear & Particles Physics Calibration Physical Sciences lcsh:QC770-798 High Energy Physics::Experiment Sensitivity (electronics)Event (particle physics)Energy (signal processing)

description

[EN] 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.

year	journal	country	edition	language
2019-10-01

https://escholarship.org/uc/item/7sb4z527