First proof of topological signature in the high pressure xenon gas TPC with electroluminescence amplification for the NEXT experiment
dc.contributor.author
dc.date.accessioned
2017-05-16T08:43:40Z
dc.date.available
2017-05-16T08:43:40Z
dc.date.issued
2016-01-19
dc.identifier.issn
1029-8479
dc.identifier.uri
dc.description.abstract
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 Qββ. 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 electronpositron 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
dc.format.mimetype
application/pdf
dc.language.iso
eng
dc.publisher
Scuola Internazionale Superiore di Studi Avanzati (SISSA)
dc.relation.isformatof
Reproducció digital del document publicat a: http://dx.doi.org/10.1007/JHEP01(2016)104
dc.relation.ispartof
Journal of High Energy Physics, 2016, núm. 104
dc.relation.ispartofseries
Articles publicats (D-EMCI)
dc.rights
Attribution 4.0 Spain
dc.rights.uri
dc.title
First proof of topological signature in the high pressure xenon gas TPC with electroluminescence amplification for the NEXT experiment
dc.type
info:eu-repo/semantics/article
dc.rights.accessRights
info:eu-repo/semantics/openAccess
dc.embargo.terms
Cap
dc.type.version
info:eu-repo/semantics/publishedVersion
dc.identifier.doi
dc.identifier.idgrec
025211
dc.identifier.eissn
1126-6708