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Author
NEXT Collaboration (Ferrario, P. et al)
;
Laing, A.
;
Lopez-March, N.
;
Gomez-Cadenas, J.J.
;
Alvarez, V.
;
Carcel, S.
;
Cervera-Villanueva, A.
;
Diaz, J.
;
Liubarsky, I.
;
Lorca, D.
;
Martin-Albo, J.
;
Martinez, A.
;
Monrabal, F.
;
Monserrate, M.
;
Muñoz Vidal, J.
;
Nebot-Guinot, M.
;
Novella, P.
;
Querol, M.
;
Renner, J.
;
Rodriguez, J.
;
Serra, L.
;
Simon, A.
;
Sorel, M.
;
Yahlali, N.
Title
First proof of topological signature in the high pressure xenon gas TPC with electroluminescence amplification for the NEXT experiment
Type
Journal Article
Year
2016
Publication
Journal of High Energy Physics
Abbreviated Journal
J. High Energy Phys.
Volume
01
Issue
1
Pages
104 - 18pp
Keywords
Dark Matter
;
Double Beta Decay
Abstract
The NEXT experiment aims to observe the neutrinoless double beta decay of Xe-136 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 Q(beta beta). 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 Na-22 1275 keV gammas and electron-positron pairs produced by conversions of gammas from the Th-228 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.
Address
[Ferrario, P.; Laing, A.; Lopez-March, N.; Gomez-Cadenas, J. J.; Alvarez, V.; Carcel, S.; Cervera, A.; Diaz, J.; Liubarsky, I.; Lorca, D.; Martin-Albo, J.; Martinez, A.; Monrabal, F.; Monserrate, M.; Munoz Vidal, J.; Nebot-Guinot, M.; Novella, P.; Querol, M.; Renner, J.; Rodriguez, J.; Serra, L.; Simon, A.; Sorel, M.; Yahlali, N.] CSIC, Inst Fis Corpuscular IFIC, Jose Beltran 2, Valencia 46980, Spain, Email: paola.ferrario@ific.uv.es
Corporate Author
Thesis
Publisher
Springer
Place of Publication
Editor
Language
English
Summary Language
Original Title
Series Editor
Series Title
Abbreviated Series Title
Series Volume
Series Issue
Edition
ISSN
1029-8479
ISBN
Medium
Area
Expedition
Conference
Notes
WOS:000370438900001
Approved
no
Is ISI
yes
International Collaboration
yes
Call Number
IFIC @ pastor @
Serial
2560
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