86314 20200716101531.0 doi 10.1007/JHEP10(2019)051 sideral 114955 ART-2019-114955 eng Novella P. Radiogenic backgrounds in the NEXT double beta decay experiment 2019 Access copy available to the general public Unrestricted Natural radioactivity represents one of the main backgrounds in the search for neutrinoless double beta decay. Within the NEXT physics program, the radioactivity- induced backgrounds are measured with the NEXT-White detector. Data from 37.9 days of low-background operations at the Laboratorio Subterráneo de Canfranc with xenon depleted in 136Xe are analyzed to derive a total background rate of (0.84±0.02) mHz above 1000 keV. The comparison of data samples with and without the use of the radon abatement system demonstrates that the contribution of airborne-Rn is negligible. A radiogenic background model is built upon the extensive radiopurity screening campaign conducted by the NEXT collaboration. A spectral fit to this model yields the specific contributions of 60Co, 40K, 214Bi and 208Tl to the total background rate, as well as their location in the detector volumes. The results are used to evaluate the impact of the radiogenic backgrounds in the double beta decay analyses, after the application of topological cuts that reduce the total rate to (0.25±0.01) mHz. Based on the best-fit background model, the NEXT-White median sensitivity to the two-neutrino double beta decay is found to be 3.5s after 1 year of data taking. The background measurement in a Qßß±100 keV energy window validates the best-fit background model also for the neutrinoless double beta decay search with NEXT-100. Only one event is found, while the model expectation is (0.75±0.12) events. info:eu-repo/grantAgreement/EC/FP7/339787/EU/Towards the NEXT generation of bb0nu experimets/NEXT info:eu-repo/grantAgreement/ES/MICINN/RTI2018-095979 info:eu-repo/grantAgreement/ES/MINECO/FIS2014-53371-C04 info:eu-repo/grantAgreement/ES/MINECO/MDM-2016-0692 info:eu-repo/grantAgreement/ES/MINECO/SEV-2014-0398 info:eu-repo/semantics/openAccess by http://creativecommons.org/licenses/by/3.0/es/ 5.875 2019 PHYSICS, PARTICLES & FIELDS 4 / 29 = 0.138 2019 Q1 T1 0.948 2019 Nuclear and High Energy Physics 2019 Q2 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Palmeiro B. Sorel M. Usón A. Ferrario P. Gómez-Cadenas J.J. Adams C. Álvarez V. Arazi L. Arnquist I.J. Azevedo C.D.R. Bailey K. Ballester F. Benlloch-Rodríguez J.M. Borges F.I.G.M. Byrnes N. Cárcel S. Carrión J.V. (orcid)0000-0002-6948-5101 Cebrían S. Universidad de Zaragoza Church E. Conde C.A.N. Contreras T. Díaz G. Díaz J. Diesburg M. Escada J. Esteve R. Felkai R. Fernandes A.F.M. Fernandes L.M.P. Ferreira A.L. Freitas E.D.C. Generowicz J. Ghosh S. Goldschmidt A. Gonzalez-Díaz D. Guenette R. Gutiérrez R.M. Haefner J. Hafidi K. Hauptman J. Henriques C.A.O. Hernando Morata J.A. Herrero P. Herrero V. Ifergan Y. Johnston S. Jones B.J.P. Kekic M. Labarga L. Laing A. Lebrun P. López-March N. Losada M. Mano R.D.P. Martín-Albo J. Martínez A. Martínez-Lema G. McDonald A.D. Monrabal F. Monteiro C.M.B. Mora F.J. Muñoz Vidal J. Nygren D.R. Para A. Pérez J. Psihas F. Querol M. Renner J. Repond J. Riordan S. Ripoll L. Rodríguez García Y. Rodríguez J. Rogers L. Romeo B. Romo-Luque C. Santos F.P. dos Santos J.M.F. Simón A. Sofka C. Stiegler T. Toledo J.F. Torrent J. Veloso J.F.C.A. Webb R. Weiss-Babai R. White J.T. Woodruff K. Yahlali N. The NEXT collaboration 2004 390 Universidad de Zaragoza Dpto. Física Teórica Área Física Atóm.Molec.y Nucl. 2019, 10 (2019), 051 1-23 J. high energy phys. Journal of High Energy Physics 1126-6708 1508277 http://zaguan.unizar.es/record/86314/files/texto_completo.pdf Versión publicada 79171 http://zaguan.unizar.es/record/86314/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:86314 articulos driver 2020-07-16-09:33:43 ARTICLE