Measurement of the ${}^{136}$Xe two-neutrino double beta decay half-life via direct background subtraction in NEXT

Novella, P.; Sorel, M.; Usón, A.; Adams, C.; Almazán, H.; Álvarez, V.; Aparicio, B.; Aranburu, A. I.; Arazi, L.; Arnquist, I. J.; Ayet, S.; Azevedo, C. D. R.; Bailey, K.; Ballester, F.; Benlloch-Rodríguez, J. M.; Borges, F. I. G. M.; Bounasser, S.; Byrnes, N.; Cárcel, S.; Carrión, J. V.; Cebrián, S.; Church, E.; Conde, C. A. N.; Contreras, T.; Cossío, F. P.; Denisenko, A. A.; Díaz, G.; Díaz, J.; Dickel, T.; Escada, J.; Esteve, R.; Fahs, A.; Felkai, R.; Fernandes, L. M. P.; Ferrario, P.; Ferreira, A. L.; Foss, F. W.; Freitas, E. D. C.; Freixa, Z.; Generowicz, J.; Goldschmidt, A.; Gómez-Cadenas, J. J.; González, R.; González-Díaz, D.; Guenette, R.; Gutiérrez, R. M.; Haefner, J.; Hafidi, K.; Hauptman, J.; Henriques, C. A. O.; Morata, J. A. Hernando; Herrero-Gómez, P.; Herrero, V.; Ho, J.; Ifergan, Y.; Jones, B. J. P.; Kekic, M.; Labarga, L.; Laing, A.; Larizgoitia, L.; Lebrun, P.; Gutierrez, D. Lopez; López-March, N.; Losada, M.; Mano, R. D. P.; Martín-Albo, J.; Martínez, A.; Martínez-Lema, G.; Martínez-Vara, M.; McDonald, A. D.; Meziani, Z. E.; Mistry, K.; Monrabal, F.; Monteiro, C. M. B.; Mora, F. J.; Vidal, J. Muñoz; Navarro, K.; Nygren, D. R.; Oblak, E.; Odriozola-Gimeno, M.; Palmeiro, B.; Para, A.; Pérez, J.; Querol, M.; Raymond, A.; Redwine, A. B.; Renner, J.; Ripoll, L.; Rivilla, I.; García, Y. Rodríguez; Rodríguez, J.; Rogero, C.; Rogers, L.; Romeo, B.; Romo-Luque, C.; Santos, F. P.; Santos, J. M. F. dos; Simón, A.; Stanford, C.; Teixeira, J. M. R.; Thapa, P.; Toledo, J. F.; Torrent, J.; Veloso, J. F. C. A.; Vuong, T. T.; Webb, R.; White, J. T.; Woodruff, K.; Yahlali, N.

doi:10.48550/arxiv.2111.11091

Cited by 6 publications

(17 citation statements)

References 13 publications

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“…× 10 21 year. This result agrees with the previous measurements from KamLAND-ZEN, EXO-200, and NEXT collaborations [13][14][15]. Our measurement with PandaX-4T, which is initially designed as a dark matter direct detection experiment, demonstrates the physics reach of large liquid xenon TPC on multiple fronts.…”

supporting

confidence: 91%

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Measurement of Double Beta Decay Half-life of $^{136}$Xe with the PandaX-4T Detector

Lin¹,

Cheng²,

Abdukerim³

et al. 2022

Preprint

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supporting

confidence: 91%

“…XENON1T, another natural xenon-based TPC, has demonstrated excellent detec-tor performance at the MeV range [11] and performed a search for NLDBD very recently [12]. The half-life of 136 Xe DBD has been measured [13][14][15] and the most precise result of 2.165±0.016(stat.)±0.059(syst. )×10 21 years is given by EXO-200 [13].…”

mentioning

confidence: 99%

Measurement of Double Beta Decay Half-life of $^{136}$Xe with the PandaX-4T Detector

Lin¹,

Cheng²,

Abdukerim³

et al. 2022

Preprint

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“…A measurement of the two-neutrino mode of the ββ decay (2νββ) in 136 Xe was performed combining data samples taken with 136 Xe-enriched (90.9±0.4%) and 136 Xe-depleted (2.6±0.2%) gas, referred to as Run-V and Run-VI, respectively [10]. A total exposure of 271.6 days (208.9 days) was collected in Run-V (Run-VI), with a small DAQ deatime of ∼3% due to the 83m Kr data taking and a trigger efficiency of 97.6±0.2% above 400 keV.…”

Section: Results From Next-whitementioning

confidence: 99%

NEXT-White results and roadmap towards a ton-scale detector

Novella

2023

J. Phys.: Conf. Ser.

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The goal of the NEXT collaboration is the sensitive search of the neutrinoless double beta decay of 136Xe at the Laboratorio Subterráneo de Canfranc. A first large-scale prototype of a high-pressure gas-Xenon electroluminescent TPC, NEXT-White, was operated from 2016 to 2021. This 4–kg radiopure detector has proven the outstanding performance of the NEXT technology in terms of the energy resolution (<1% FWHM at 2.6 MeV) and the topology-based background rejection. After measuring the relevant backgrounds and their spatial origin, the NEXT-White data collected with 136Xe-enriched and 136Xe-depleted gas have been used to perform a measurement of the two-neutrino mode of the double beta decay. A novel technique based on a direct background subtraction yields a half-life of 2.34 − 0.46 + 0.80 ( stat ) − 0.17 + 0.30 (sys) × 10 21 yr . This result is consistent with the half-life derived from a background-model-dependent approach. Scaling the technological solutions of NEXT-White, the NEXT-100 detector is being constructed during 2022 and will start the physics data taking in 2023. Holding 100 kg of 136Xe and with a background index below 5×10−4 counts/keV/kg/year, NEXT-100 will perform the first competitive search for the neutrinoless double beta decay within the NEXT roadmap. After 3 years of data taking, a sensitivity to the half-life of 6×1025 yr at 90% C.L. will be achieved. The design for a future ton-scale detector, NEXT-HD, is being carried out in paralel. Operating with low-difussion gas mixtures and a reduced background budget, NEXT-HD will reach sensitivities above 1027 yr. A promising R&D line aims at eventually equiping the NEXT techonlogy with 136Ba-tagging capabilities, opening the doors for a truly background-free experiment.

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“…The Neutrino Experiment with a Xenon TPC (NEXT) is an experimental program based on this technology with xenon enriched in 136 Xe serving as both the source and detection medium. The latest experiment in this program to finish operation, NEXT-White [2], has demonstrated (with 3.5 kg of xenon) superb energy resolution at 1% FWHM at 2.5 MeV [3], measured the 2𝜈𝛽𝛽 half-life [4] and searched for 0𝜈𝛽𝛽 [5]. The forthcoming NEXT-100 [6] experiment is currently under construction and will search for 0𝜈𝛽𝛽 with 100 kg of enriched xenon (91% 136 Xe) with sensitivity to a half-life of 6 × 10 25 years at the 90% confidence level after three years of operation [7].…”

Section: Introductionmentioning

confidence: 99%

Design, characterization and installation of the NEXT-100 cathode and electroluminescence regions

Mistry,

Rogers,

Jones

et al. 2024

J. Inst.

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NEXT-100 is currently being constructed at the Laboratorio Subterráneo de Canfranc in the Spanish Pyrenees and will search for neutrinoless double beta decay using a high-pressure gaseous time projection chamber (TPC) with 100 kg of xenon. Charge amplification is carried out via electroluminescence (EL) which is the process of accelerating electrons in a high electric field region causing secondary scintillation of the medium proportional to the initial charge. The NEXT-100 EL and cathode regions are made from tensioned hexagonal meshes of 1 m diameter. This paper describes the design, characterization, and installation of these parts for NEXT-100. Simulations of the electric field are performed to model the drift and amplification of ionization electrons produced in the detector under various EL region alignments and rotations. Measurements of the electrostatic breakdown voltage in air characterize performance under high voltage conditions and identify breakdown points. The electrostatic deflection of the mesh is quantified and fit to a first-principles mechanical model. Measurements were performed with both a standalone test EL region and with the NEXT-100 EL region before its installation in the detector. Finally, we describe the parts as installed in NEXT-100, following their deployment in Summer 2023.

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Measurement of the ${}^{136}$Xe two-neutrino double beta decay half-life via direct background subtraction in NEXT

Cited by 6 publications

References 13 publications

Measurement of Double Beta Decay Half-life of $^{136}$Xe with the PandaX-4T Detector

Measurement of Double Beta Decay Half-life of $^{136}$Xe with the PandaX-4T Detector

NEXT-White results and roadmap towards a ton-scale detector

Design, characterization and installation of the NEXT-100 cathode and electroluminescence regions

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