56649 20200221144214.0 doi 10.1007/JHEP01(2016)104 sideral 95702 ART-2016-95702 eng Ferrario, P. First proof of topological signature in the high pressure xenon gas TPC with electroluminescence amplification for the NEXT experiment 2016 Access copy available to the general public Unrestricted The NEXT experiment aims to observe the neutrinoless double beta decay of 136Xe in a high-pressure xenon gas TPC using electroluminescence (EL) to amplify the signal from ionization. One of the main advantages of this technology is the possibility to reconstruct the topology of events with energies close to Qßß. This paper presents the first demonstration that the topology provides extra handles to reject background events using data obtained with the NEXT-DEMO prototype. Single electrons resulting from the interactions of 22Na 1275 keV gammas and electron- positron pairs produced by conversions of gammas from the 228Th decay chain were used to represent the background and the signal in a double beta decay. These data were used to develop algorithms for the reconstruction of tracks and the identification of the energy deposited at the end-points, providing an extra background rejection factor of 24.3 ± 1.4 (stat.)%, while maintaining an efficiency of 66.7 ± 1.% for signal events. info:eu-repo/grantAgreement/ES/MINECO/FPA2009-13697-C04-04 info:eu-repo/grantAgreement/ES/MINECO/FIS2012-37947-C04 info:eu-repo/grantAgreement/ES/MINECO/Consolider-Ingenio-2010/CSD2008-00037 info:eu-repo/grantAgreement/EC/FP7/339787/EU/Towards the NEXT generation of bb0nu experimets/NEXT info:eu-repo/semantics/openAccess by http://creativecommons.org/licenses/by/3.0/es/ 6.063 2016 PHYSICS, PARTICLES & FIELDS 3 / 29 = 0.103 2016 Q1 T1 1.163 2016 Nuclear and High Energy Physics 2016 Q1 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Laing, A. López-March, N. Gómez-Cadenas, J. J. Álvarez, V. Azevedo, C.D.R. Borges, F.I.G. Cárcel, S. (orcid)0000-0002-6948-5101 Cebrián, S. Universidad de Zaragoza Cervera, A. Conde, C.A.N. (orcid)0000-0002-8921-910X Dafni, T. Universidad de Zaragoza Díaz, J. Diesburg, M. Esteve, R. Fernandes, L.M.P. Ferreira, A.L. Freitas, E.D.C. Gehman, V.M. Goldschmidt, A. González-Díaz, D. Gutiérrez, R. M. Hauptman, J. Henriques, C.A.O. Hernando Morata, J. A. (orcid)0000-0003-1163-1687 Irastorza, I.G. Universidad de Zaragoza Labarga, L. Lebrun, P. Liubarsky, I. Lorca, D. Losada, M. (orcid)0000-0002-5352-1884 Luzón, G. Universidad de Zaragoza Marí, A. Martín-Albo, J. Martínez-Lema, G. Martínez, A. Miller, T. Monrabal, F. Monserrate, M. Monteiro, C.M.B. Mora, F.J. Moutinho, L.M. Muñoz Vidal, J. Nebot-Guinot, M Novella, P. Nygren, D. Para, A. Pérez, J. Pérez Aparicio, J. L. Querol, M. Renner, J. Ripoll, L. Rodríguez, J. Santos, F.P. dos Santos, J. M. F. Serra, L. Shuman, D. Simón, A. Sofka, C. Sorel, M. Toledo, J.F. Torrent, J. Tsamalaidze, Z. Veloso, J.F.C.A. (orcid)0000-0003-0228-7589 Villar, J.A. Universidad de Zaragoza Webb, R. White, J.T. Yahlali, N. Yepes-Ramírez, H. 2004 390 Universidad de Zaragoza Dpto. Física Teórica Área Física Atóm.Molec.y Nucl. 01 (2016), 104 [18 pp.] J. high energy phys. Journal of High Energy Physics 1126-6708 526280 http://zaguan.unizar.es/record/56649/files/texto_completo.pdf Versión publicada 76130 http://zaguan.unizar.es/record/56649/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:56649 articulos driver 2020-02-21-13:12:37 ARTICLE