Radiogenic backgrounds in the NEXT double beta decay experiment

P. Novella; B. Palmeiro; M. Sorel; A. Uson; P. Ferrario; J. J. Gomez-Cadenas; C. Adams; V. Álvarez; L. Arazi; I. J. Arnquist; C. D. R. Azevedo; K. Bailey; F. Ballester; J. M. Benlloch-Rodriguez; F. I. G. M. Borges; N. Byrnes; S. Carcel; J. Carrion; S. Cebrian; E. Church; C. A. N. Conde; T. Contreras; G. Diaz; J. Diaz; M. Diesburg; J. Escada; R. Esteve; R. Felkai; A. F. M. Fernandes; L. M. P. Fernandes; A. L. Ferreira; E. D. C. Freitas; J. Generowicz; S. Ghosh; A. Goldschmidt; D. Gonzalez-Diaz; R. Guenette; R. M. Gutierrez; J. Haefner; K. Hafidi; J. Hauptman; C. A. O. Henriques; J. A. Hernando Morata; P. Herrero; V. Herrero; Y. Ifergan; S. Johnston; B. J. P. Jones; M. Kekic; L. Labarga; A. Laing; P. Lebrun; N. Lopez-March; M. Losada; R. D. P. Mano; J. Martin-Albo; A. Martinez; G. Martinez-Lema; A. D. McDonald; F. Monrabal; C. M. B. Monteiro; F. J. Mora; J. Munoz Vidal; D. R. Nygren; A. Para; J. Perez; F. Psihas; M. Querol; J. Renner; J. Repond; S. Riordan; L. Ripoll; Y. Rodriguez Garcia; J. Rodriguez; L. Rogers; B. Romeo; C. Romo-Luque; F. P. Santos; J. M. F. dos Santos; A. Simon; C. Sofka; T. Stiegler; J. F. Toledo; J. Torrent; J. F. C. A. Veloso; R. Webb; R. Weiss-Babai; J. T. White; K. Woodruff; N. Yahlali; NEXT Collaboration

doi:10.1007/JHEP10(2019)051

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Radiogenic backgrounds in the NEXT double beta decay experiment

P. Novella, B. Palmeiro, M. Sorel, A. Uson, P. Ferrario, J. J. Gomez-Cadenas, C. Adams, V. Álvarez, L. Arazi, I. J. Arnquist, …

The journal of high energy physics, Vol.2019(10), pp.1-26

10/01/2019

DOI: 10.1007/JHEP10(2019)051

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Abstract

Natural 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 Subterraneo de Canfranc with xenon depleted in Xe-136 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-60, K-40, Bi-214 and Tl-208 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 3.5 sigma after 1 year of data taking. The background measurement in a Q(beta beta)+/- 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.

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Physics, Particles & Fields

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Title: Subtitle: Radiogenic backgrounds in the NEXT double beta decay experiment
Creators: P. Novella - Universitat de València
B. Palmeiro - Instituto de Física Corpuscular
M. Sorel - Instituto de Física Corpuscular
A. Uson - Instituto de Física Corpuscular
P. Ferrario - Ikerbasque
J. J. Gomez-Cadenas - Ikerbasque
C. Adams - Harvard University
V. Álvarez - Universitat de València
L. Arazi - Ben-Gurion University of the Negev
I. J. Arnquist - Pacific Northwest National Laboratory
C. D. R. Azevedo - University of Aveiro
K. Bailey - Argonne National Laboratory
F. Ballester - Instituto de Instrumentación para Imagen Molecular
J. M. Benlloch-Rodriguez - Instituto de Física Corpuscular
F. I. G. M. Borges - University of Coimbra
N. Byrnes - The University of Texas at Arlington
S. Carcel - Instituto de Física Corpuscular
J. Carrion - Instituto de Física Corpuscular
S. Cebrian - Universidad de Zaragoza
E. Church - Pacific Northwest National Laboratory
C. A. N. Conde - University of Coimbra
T. Contreras - Harvard University
G. Diaz - Donostia International Physics Center
J. Diaz - Instituto de Física Corpuscular
M. Diesburg - Fermi National Accelerator Laboratory
J. Escada - University of Coimbra
R. Esteve - Instituto de Instrumentación para Imagen Molecular
R. Felkai - Instituto de Física Corpuscular
A. F. M. Fernandes - University of Coimbra
L. M. P. Fernandes - University of Coimbra
A. L. Ferreira - University of Aveiro
E. D. C. Freitas - University of Coimbra
J. Generowicz - Donostia International Physics Center
S. Ghosh - Harvard University
A. Goldschmidt - Lawrence Berkeley National Laboratory
D. Gonzalez-Diaz - Universidade de Santiago de Compostela
R. Guenette - Harvard University
R. M. Gutierrez - Universidad Antonio Nariño
J. Haefner - Harvard University
K. Hafidi - Argonne National Laboratory
J. Hauptman - Iowa State University
C. A. O. Henriques - University of Coimbra
J. A. Hernando Morata - Universidade de Santiago de Compostela
P. Herrero - Donostia International Physics Center
V. Herrero - Universitat Politècnica de València
Y. Ifergan - Ben-Gurion University of the Negev
S. Johnston - Argonne National Laboratory
B. J. P. Jones - Univ Texas Arlington, Dept Phys, POB 19059, Arlington, TX 76019 USA
M. Kekic - Instituto de Física Corpuscular
L. Labarga - Universidad Autónoma de Madrid
A. Laing - The University of Texas at Arlington
P. Lebrun - Fermi National Accelerator Laboratory
N. Lopez-March - Instituto de Física Corpuscular
M. Losada - Universidad Antonio Nariño
R. D. P. Mano - University of Coimbra
J. Martin-Albo - Harvard University
A. Martinez - Donostia International Physics Center
G. Martinez-Lema - Instituto de Física Corpuscular
A. D. McDonald - The University of Texas at Arlington
F. Monrabal - Donostia International Physics Center
C. M. B. Monteiro - University of Coimbra
F. J. Mora - Instituto de Instrumentación para Imagen Molecular
J. Munoz Vidal - Universitat de València
D. R. Nygren - The University of Texas at Arlington
A. Para - Fermi National Accelerator Laboratory
J. Perez - Canfranc Underground Laboratory
F. Psihas - The University of Texas at Arlington
M. Querol - Instituto de Física Corpuscular
J. Renner - Universitat de València
J. Repond - Argonne National Laboratory
S. Riordan - Argonne National Laboratory
L. Ripoll - Universitat de Girona
Y. Rodriguez Garcia - Univ Antonio Narino, Ctr Invest Ciencias Basicas & Aplicadas, Carretera 3 Este 47 A-15, Bogota, Colombia
J. Rodriguez - Instituto de Física Corpuscular
L. Rogers - The University of Texas at Arlington
B. Romeo - Donostia International Physics Center
C. Romo-Luque - Instituto de Física Corpuscular
F. P. Santos - University of Coimbra
J. M. F. dos Santos - University of Coimbra
A. Simon - Ben-Gurion University of the Negev
C. Sofka - Texas A&M University
T. Stiegler - Texas A&M University
J. F. Toledo - Instituto de Instrumentación para Imagen Molecular
J. Torrent - Donostia International Physics Center
J. F. C. A. Veloso - University of Aveiro
R. Webb - Texas A&M University
R. Weiss-Babai - Ben-Gurion University of the Negev
J. T. White - Texas A&M University
K. Woodruff - The University of Texas at Arlington
N. Yahlali - Instituto de Física Corpuscular
NEXT Collaboration
Resource Type: Journal article
Publication Details: The journal of high energy physics, Vol.2019(10), pp.1-26
DOI: 10.1007/JHEP10(2019)051
ISSN: 1029-8479
eISSN: 1029-8479
Publisher: Springer Nature
Number of pages: 26
Grant note: 339787-NEXT / European Research Council (ERC); Spanish Government 674896; 690575; 740055 / European Union; European Union (EU) PTDC/FIS-NUC/2525/2014; UID/FIS/04559/2013; PD/BD/105921/2014; SFRH/BPD/109180/2015; SFRH/BPD/76842/2011 / Portuguese FCT; Fundacao para a Ciencia e a Tecnologia (FCT) FIS2014-53371-C04; RTI2018-095979; SEV-2014-0398; MDM-2016-0692 / Ministerio de Economia y Competitividad of Spain; Spanish Government PROMETEO/2016/120; SEJI/2017/011 / GVA of Spain PTDC/FIS-NUC/2525/2014 / Fundao para a Cincia e a Tecnologia; Fundacao para a Ciencia e a Tecnologia (FCT) DE-AC02-06CH11357; DE-AC02-07CH11359; DE-FG02-13ER42020; DE-SC0019223/DE-SC0019054 / U.S. Department of Energy; United States Department of Energy (DOE) University of Texas at Arlington FIS2014-53371-C04; RTI2018-095979; SEV-2014-0398; MDM-2016-0692 / Ministerio de Ciencia, Innovacion y Universidades of Spain; Spanish Government RYC-2015-18820 / Ramon y Cajal program (Spain); Spanish Government
Language: English
Date published: 10/01/2019
Academic Unit: Physics and Astronomy
Record Identifier: 9984627207302771

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