63213 20250722154010.0 doi 10.1088/1742-6596/888/1/012078 sideral 101963 ART-2017-101963 eng Iguaz, F.J. Universidad de Zaragoza (orcid)0000-0001-6327-9369 The potential of discrimination methods in a high pressure xenon TPC for the search of the neutrinoless double-beta decay of Xe-136 2017 Access copy available to the general public Unrestricted In the search for the neutrinoless double beta decay of 136Xe, a high pressure xenon time projection chamber (HPXe-TPC) has two advantages over liquid xenon TPCs: a better energy resolution and the access to topological features, which may provide extra discrimination from background events. The PandaX-III experiment has recently proposed a 200 kg HPXe-TPC based on Micromegas readout planes, to be located at the Jinping Underground Laboratory in China. Its detection concept is based on two results obtained within the T-REX project: Micromegas readouts can be built with extremely low levels of radioactivity; and the operation in xenon-trimethylamine at 10 bar in realistic experimental conditions has proven an energy resolution of 3% FWHM at the region of interest. In this work, two discrimination methods are applied to simulated signal and background data in a generic 200 kg HPXe-TPC, based on two well-known algorithms of graph theory: the identification of connections and the search for the longest path. Rejection factors greater than 100 are obtained for small pixel sizes and a signal efficiency of 40%. Moreover, a new observable (the blob charge density) rejects better surface contaminations, which makes the use of a trigger signal (T0) not imperative in this experiment. info:eu-repo/grantAgreement/EC/FP7/240054/EU/Novel Developments in Time Projection Chambers (TPCs) for Rare Event Searches in Underground Astroparticle EXperiments/TREX info:eu-repo/semantics/openAccess by http://creativecommons.org/licenses/by/3.0/es/ 0.241 2017 Physics and Astronomy (miscellaneous) 2017 Q3 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Aznar, F. (orcid)0000-0003-3629-0540 Castel, J.F. Universidad de Zaragoza (orcid)0000-0003-3532-7540 Cebrián, S. Universidad de Zaragoza (orcid)0000-0002-6948-5101 Dafni, T. Universidad de Zaragoza (orcid)0000-0002-8921-910X Galán, J. Garza, J.G. Irastorza, I.G. Universidad de Zaragoza (orcid)0000-0003-1163-1687 Luzón, G. Universidad de Zaragoza (orcid)0000-0002-5352-1884 Mirallas, H. (orcid)0000-0002-9951-8680 Ruiz-Choliz, E. Universidad de Zaragoza (orcid)0000-0002-2417-7121 2004 X Universidad de Zaragoza Dpto. Física Teórica Proy. investigación HCA 2004 390 Universidad de Zaragoza Dpto. Física Teórica Área Física Atóm.Molec.y Nucl. 888, 1 (2017), 012078 [3 pp] J. Phys.: Conf. Ser. Journal of Physics: Conference Series 1742-6588 195314 http://zaguan.unizar.es/record/63213/files/texto_completo.pdf Versión publicada 13750 http://zaguan.unizar.es/record/63213/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:63213 articulos driver 2025-07-22-15:35:39 ARTICLE