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

Ferrario, P.

doi:10.1007/JHEP01(2016)104

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

Journal Article · Tue Jan 19 00:00:00 EST 2016 · Journal of High Energy Physics (Online)

DOI:https://doi.org/10.1007/JHEP01(2016)104· OSTI ID:1271011

Ferrario, P. ^[1]

Instituto de Fisica Corpuscular (IFIC), CSIC & Univ. de Valencia, Valencia (Spain). et al.

© 2016, The Author(s). The NEXT experiment aims to observe the neutrinoless double beta decay of 136 Xe 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 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 22 Na 1275 keV gammas and electronpositron pairs produced by conversions of gammas from the 228 Th 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.[Figure not available: see fulltext.]

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Research Organization:: Brookhaven National Lab. (BNL), Upton, NY (United States); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP)

Contributing Organization:: NEXT Collaboration; NEXT collaboration

Grant/Contract Number:: AC02-07CH11359; AC02-05CH11231

OSTI ID:: 1271011

Alternate ID(s):: OSTI ID: 1379001

Report Number(s):: arXiv:1507.05902; FERMILAB-PUB-15-648-CD-ND; 1384118

Journal Information:: Journal of High Energy Physics (Online), Vol. 2016, Issue 1; ISSN 1029-8479

Publisher:: Springer BerlinCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 40 works

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References (6)

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Signal-background discrimination with convolutional neural networks in the PandaX-III experiment using MC simulation Qiao, Hao; Lu, ChunYu; Chen, Xun Science China Physics, Mechanics & Astronomy, Vol. 61, Issue 10 https://doi.org/10.1007/s11433-018-9233-5	journal	August 2018
Performance of optically readout GEM-based TPC with a ⁵⁵ Fe source Costa, I. Abritta; Baracchini, E.; Bellini, F. Journal of Instrumentation, Vol. 14, Issue 07 https://doi.org/10.1088/1748-0221/14/07/p07011	journal	July 2019
High Pressure Gas Xenon TPCs for Double Beta Decay Searches Gomez-Cadenas, Juan J.; Monrabal Capilla, Francesc; Ferrario, Paola Frontiers in Physics, Vol. 7 https://doi.org/10.3389/fphy.2019.00051	journal	April 2019
Sensitivity and discovery potential of the proposed nEXO experiment to neutrinoless double beta decay Collaboration, Nexo; Albert, J. B.; Anton, G. arXiv https://doi.org/10.48550/arxiv.1710.05075	text	January 2017
Electron Drift and Longitudinal Diffusion in High Pressure Xenon-Helium Gas Mixtures McDonald, A. D.; Woodruff, K.; Atoum, B. Al arXiv https://doi.org/10.48550/arxiv.1902.05544	text	January 2019
High Pressure Gas Xenon TPCs for Double Beta Decay Searches Gomez-Cadenas, J. J.; Monrabal, F.; Ferrario, P. arXiv https://doi.org/10.48550/arxiv.1903.02435	preprint	January 2019

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