doi:10.1007/JHEP08(2021)164engAdams 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.Cebrián S.Church E.Conde C.A.N.Contreras T.Denisenko A.A.Díaz G.Díaz J.Escada J.Esteve R.Felkai R.Fernandes L.M.P.Ferrario P.Ferreira A.L.Foss F.Freitas E.D.C.Freixa Z.Generowicz J.Goldschmidt A.Gómez-Cadenas J.J.González R.González-Díaz D.Gosh S.Guenette R.Gutiérrez R.M.Haefner J.Hafidi K.Hauptman J.Henriques C.A.O.Hernando Morata J.A.Herrero P.Herrero V.Ho J.Ifergan Y.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-Vara M.Martínez-Lema G.McDonald A.D.Meziani Z.E.Monrabal F.Monteiro C.M.B.Mora F.J.Muñoz Vidal J.Newhouse C.Novella P.Nygren D.R.Oblak E.Palmeiro B.Para A.Pérez J.Querol M.Redwine A.Renner J.Ripoll L.Rivilla I.Rodríguez García Y.Rodríguez J.Rogero C.Rogers L.Romeo B.Romo-Luque C.Santos F.P.dos Santos J.M.F.Simón A.Sorel M.Stanford C.Teixeira J.M.R.Thapa P.Toledo J.F.Torrent J.Usón A.Veloso J.F.C.A.Vuong T.T.Webb R.Weiss-Babai R.White J.T.Woodruff K.Yahlali N.The NEXT collaborationSensitivity of a tonne-scale NEXT detector for neutrinoless double-beta decay searchesART-2021-125865The Neutrino Experiment with a Xenon TPC (NEXT) searches for the neutrinoless double-beta (0¿ßß) decay of 136Xe using high-pressure xenon gas TPCs with electroluminescent amplification. A scaled-up version of this technology with about 1 tonne of enriched xenon could reach in less than 5 years of operation a sensitivity to the half-life of 0¿ßß decay better than 1027 years, improving the current limits by at least one order of magnitude. This prediction is based on a well-understood background model dominated by radiogenic sources. The detector concept presented here represents a first step on a compelling path towards sensitivity to the parameter space defined by the inverted ordering of neutrino masses, and beyond. [Figure not available: see fulltext.] © 2021, The Author(s).2021http://zaguan.unizar.es/record/11199510.1007/JHEP08(2021)164http://zaguan.unizar.es/record/111995oai:zaguan.unizar.es:111995info:eu-repo/grantAgreement/EC/H2020/674896/EU/The Elusives Enterprise: Asymmetries of the Invisible Universe/ELUSIVESThis project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No H2020 674896-ELUSIVESinfo:eu-repo/grantAgreement/EC/H2020/690575/EU/InvisiblesPlus/InvisiblesPlusThis project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No H2020 690575-InvisiblesPlusinfo:eu-repo/grantAgreement/EC/H2020/740055/EU/Molecule for low diffusion TPCs for rare event searches/MELODICThis project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No H2020 740055-MELODICinfo:eu-repo/grantAgreement/ES/MINECO-MCIU/FIS2014-53371-C04info:eu-repo/grantAgreement/ES/MINECO-MCIU/RTI2018-095979Journal of High Energy Physics 2021, 8 (2021), 164 [22 pp]byhttp://creativecommons.org/licenses/by/3.0/es/info:eu-repo/semantics/openAccess