Energy calibration of the NEXT-White detector with 1% resolution near Q${}_{\beta \beta }$ of ${}^{136}$Xe

Abstract

Excellent energy resolution is one of the primary advantages of electroluminescent high pressure xenon TPCs, and searches for rare physics events such as neutrinoless double-beta decay ($\beta \beta 0\nu$) require precise energy measurements. Using the NEXT-White detector, developed by the NEXT (Neutrino Experiment with a Xenon TPC) collaboration, we show for the first time that an energy resolution of 1% FWHM can be achieved at 2.6 MeV, establishing the present technology as the one with the best energy resolution of all xenon detectors for $\beta \beta 0\nu$ searches.

arXiv comment13 pages, 7 figures; accepted to JHEP

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• Demonstration of the event identification capabilities of the NEXT-White detector
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• Dielectric Strength of Noble and Quenched Gases for High Pressure Time Projection Chambers
• Double Beta Decay APPEC Committee Report
• Status and prospects of the NEXT experiment for neutrinoless double beta decay searches
• Mitigation of Backgrounds from Cosmogenic ${}^{137}$Xe in Xenon Gas Experiments using ${}^3$He Neutron Capture
• Towards a background-free neutrinoless double beta decay experiment based on a fluorescent bicolor sensor
• Design, characterization and installation of the NEXT-100 cathode and electroluminescence regions
• The NEXT-100 Detector
• Barium Tagging with Selective, Dry-Functional, Single Molecule Sensitive On-Off Fluorophores for the NEXT Experiment
• Double Beta Decay Experiments at Canfranc Underground Laboratory
• FAT-GEMs: (Field Assisted) Transparent Gaseous-Electroluminescence Multipliers
• Status of the NEXT experiment for neutrinoless double beta decay searches
• High Voltage Delivery and Distribution for the NEXT-100 Time Projection Chamber
• First results of the NEXT-100 detector using ${}^{83m}$Kr decays