doi:10.1007/JHEP10(2019)230engRenner, J.Díaz López, G.Ferrario, P.Hernando Morata, J.A.Kekic, M.Martínez-Lema, G.Monrabal, F.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.Cebrián, S.Church, E.Conde, C.A.N.Contreras, T.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.González-Díaz, D.Guenette, R.Gutiérrez, R.M.Haefner, J.Hafidi, K.Hauptman, J.Henriques, C.A.O.Herrero, P.Herrero, V.Ifergan, Y.Johnston, S.Jones, B.J.P.Labarga, L.Laing, A.Lebrun, P.López-March, N.Losada, M.Mano, R.D.P.Martín-Albo, J.Martínez, A.McDonald, A.D.Monteiro, C.M.B.Mora, F.J.Muñoz Vidal, J.Novella, P.Nygren, D.R.Palmeiro, B.Para, A.Pérez, J.Psihas, F.Querol, M.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.Sorel, M.Stiegler, T.Toledo, J.F.Torrent, J.Usón, A.Veloso, J.F.C.A.Webb, R.Weiss-Babai, R.White, J.T.Woodruff, K.Yahlali, N.The NEXT collaborationEnergy calibration of the NEXT-White detector with 1% resolution near Qßß of 136XeART-2019-114950Excellent energy resolution is one of the primary advantages of electroluminescent high-pressure xenon TPCs. These detectors are promising tools in searching for rare physics events, such as neutrinoless double-beta decay (ßß0¿), which require precise energy measurements. Using the NEXT-White detector, developed by the NEXT (Neutrino Experiment with a Xenon TPC) collaboration, we show for the first time that an energy resolution of 1% FWHM can be achieved at 2.6 MeV, establishing the present technology as the one with the best energy resolution of all xenon detectors for ßß0¿ searches. [Figure not available: see fulltext.2019http://zaguan.unizar.es/record/8635810.1007/JHEP10(2019)230http://zaguan.unizar.es/record/86358oai:zaguan.unizar.es:86358info:eu-repo/grantAgreement/EC/FP7/339787/EU/Towards the NEXT generation of bb0nu experimets/NEXTinfo:eu-repo/grantAgreement/ES/MICINN/RTI2018-095979info:eu-repo/grantAgreement/ES/MINECO/FIS2014-53371-C04info:eu-repo/grantAgreement/ES/MINECO/MDM-2016-0692info:eu-repo/grantAgreement/ES/MINECO/RYC-2015-18820info:eu-repo/grantAgreement/ES/MINECO/SEV-2014-0398Journal of High Energy Physics 2019, 10 (2019), 230 1-11byhttp://creativecommons.org/licenses/by/3.0/es/info:eu-repo/semantics/openAccess