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Title: First proof of topological signature in the high pressure xenon gas TPC with electroluminescence amplification for the NEXT experiment

Abstract

The NEXT experiment aims to observe the neutrinoless double beta decay of xenon in a high-pressure 136Xe 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 ββ. 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 electron-positron 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. Furthermore, 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.

Authors:
 [1]
  1. Instituto de Fisica Corpuscular (IFIC), CSIC & Univ. de Valencia, Valencia (Spain). et al.
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL), Upton, NY (United States); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Contributing Org.:
NEXT Collaboration; NEXT collaboration
OSTI Identifier:
1271011
Alternate Identifier(s):
OSTI ID: 1379001
Report Number(s):
arXiv:1507.05902; FERMILAB-PUB-15-648-CD-ND
Journal ID: ISSN 1029-8479; 1384118
Grant/Contract Number:  
AC02-07CH11359; AC02-05CH11231
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Journal of High Energy Physics (Online)
Additional Journal Information:
Journal Volume: 2016; Journal Issue: 1; Journal ID: ISSN 1029-8479
Publisher:
Springer Berlin
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; dark matter; double beta decay

Citation Formats

Ferrario, P. First proof of topological signature in the high pressure xenon gas TPC with electroluminescence amplification for the NEXT experiment. United States: N. p., 2016. Web. doi:10.1007/JHEP01(2016)104.
Ferrario, P. First proof of topological signature in the high pressure xenon gas TPC with electroluminescence amplification for the NEXT experiment. United States. doi:10.1007/JHEP01(2016)104.
Ferrario, P. Tue . "First proof of topological signature in the high pressure xenon gas TPC with electroluminescence amplification for the NEXT experiment". United States. doi:10.1007/JHEP01(2016)104. https://www.osti.gov/servlets/purl/1271011.
@article{osti_1271011,
title = {First proof of topological signature in the high pressure xenon gas TPC with electroluminescence amplification for the NEXT experiment},
author = {Ferrario, P.},
abstractNote = {The NEXT experiment aims to observe the neutrinoless double beta decay of xenon in a high-pressure 136Xe 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 electron-positron 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. Furthermore, 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.},
doi = {10.1007/JHEP01(2016)104},
journal = {Journal of High Energy Physics (Online)},
issn = {1029-8479},
number = 1,
volume = 2016,
place = {United States},
year = {2016},
month = {1}
}

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Cited by: 12 works
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