English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/207799
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE
Exportar a otros formatos:


Radiogenic backgrounds in the NEXT double beta decay experiment

AuthorsNEXT Collaboration; Álvarez Puerta, Vicente ; Benlloch Rodríguez, José María; Botas, A.; Cárcel, Sara ; Carrion, J.V.; Díaz Medina, José ; Felkai, Ryan; Kekic, Marija; Laing, Andrew ; Lopez-March, N.; Martínez Pérez, Alberto ; Martinez-Lema, G.; Musti, M.; Muñoz Vidal, Javier; Nebot Guinot, Miquel ; Novella, Pau ; Palmeiro, Brais; Querol, Marc; Renner, Joshua; Rodríguez Samaniego, Javier ; Romo Luque, Carmen; Simón, Ander ; Sorel, Michel ; Simón, Ander ; Yahlali, Nadia
KeywordsDark Matter
Double Beta Decay
Issue DateOct-2019
PublisherInstitute of Physics Publishing
CitationJournal of High Energy Physics 2019, 10: 51 (2019)
AbstractNatural radioactivity represents one of the main backgrounds in the search for neutrinoless double beta decay. Within the NEXT physics program, the radioactivity- induced backgrounds are measured with the NEXT-White detector. Data from 37.9 days of low-background operations at the Laboratorio Subterráneo de Canfranc with xenon depleted in Xe are analyzed to derive a total background rate of (0.84±0.02) mHz above 1000 keV. The comparison of data samples with and without the use of the radon abatement system demonstrates that the contribution of airborne-Rn is negligible. A radiogenic background model is built upon the extensive radiopurity screening campaign conducted by the NEXT collaboration. A spectral fit to this model yields the specific contributions of Co, K, Bi and Tl to the total background rate, as well as their location in the detector volumes. The results are used to evaluate the impact of the radiogenic backgrounds in the double beta decay analyses, after the application of topological cuts that reduce the total rate to (0.25±0.01) mHz. Based on the best-fit background model, the NEXT-White median sensitivity to the two-neutrino double beta decay is found to be 3.5σ after 1 year of data taking. The background measurement in a Q±100 keV energy window validates the best-fit background model also for the neutrinoless double beta decay search with NEXT-100. Only one event is found, while the model expectation is (0.75±0.12) events. [Figure not available: see fulltext.].
Publisher version (URL)http://dx.doi.org/10.1007/JHEP10(2019)051
Identifiersdoi: 10.1007/JHEP10(2019)051
issn: 1029-8479
Appears in Collections:(I3M) Artículos
(IFIC) Artículos
Files in This Item:
File Description SizeFormat 
284_Next_Radiogenic.pdf1,58 MBAdobe PDFThumbnail
Show full item record
Review this work

Related articles:

WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.