Demonstration of the event identification capabilities of the NEXT-White detector
dc.contributor.author
dc.date.accessioned
2020-06-08T12:12:31Z
dc.date.available
2020-06-08T12:12:31Z
dc.date.issued
2019-10-04
dc.identifier.issn
1126-6708
dc.identifier.uri
dc.description.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.
dc.description.sponsorship
The NEXT Collaboration acknowledges support from the following agencies and institutions: the European Research Council (ERC) under the Advanced Grant 339787-
NEXT; the European Union’s Framework Programme for Research and Innovation Horizon 2020 (2014-2020) under the Marie Sk lodowska-Curie Grant Agreements No. 674896,
690575 and 740055; the Ministerio de Economía y Competitividad and the Ministerio de Ciencia, Innovación y Universidades of Spain under grants FIS2014-53371-C04,
RTI2018-095979, the Severo Ochoa Program SEV-2014-0398 and the María de Maetzu
Program MDM-2016-0692; the GVA of Spain under grants PROMETEO/2016/120 and SEJI/2017/011; the Portuguese FCT under project PTDC/FIS-NUC/2525/2014, under project UID/FIS/04559/2013 to fund the activities of LIBPhys, and under grants
PD/BD/105921/2014, SFRH/BPD/109180/2015 and SFRH/BPD/76842/2011; the U.S.
Department of Energy under contracts number DE-AC02-06CH11357 (Argonne National
Laboratory), DE-AC02-07CH11359 (Fermi National Accelerator Laboratory), DE-FG02-
13ER42020 (Texas A&M) and DE-SC0019223 / DE-SC0019054 (University of Texas at
Arlington); and the University of Texas at Arlington. DGD acknowledges Ramon y Cajal
program (Spain) under contract number RYC-2015-18820. We also warmly acknowledge
the Laboratori Nazionali del Gran Sasso (LNGS) and the Dark Side collaboration for their
help with TPB coating of various parts of the NEXT-White TPC. Finally, we are grateful to the Laboratorio Subterr´aneo de Canfranc for hosting and supporting the NEXT
experiment
dc.format.mimetype
application/pdf
dc.language.iso
eng
dc.publisher
Springer Verlag
dc.relation.isformatof
Reproducció digital del document publicat a: https://doi.org/10.1007/JHEP10(2019)052
dc.relation.ispartof
Journal of High Energy Physics, 2019, vol. 2019, art. núm. 52
dc.relation.ispartofseries
Articles publicats (D-EMCI)
dc.rights
Attribution 4.0 International
dc.rights.uri
dc.title
Demonstration of the event identification capabilities of the NEXT-White detector
dc.type
info:eu-repo/semantics/article
dc.rights.accessRights
info:eu-repo/semantics/openAccess
dc.type.version
info:eu-repo/semantics/publishedVersion
dc.identifier.doi
dc.type.peerreviewed
peer-reviewed
dc.identifier.eissn
1029-8479