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arXiv · 2602.14538

Characterization of argon recoils at the keV scale with ReD and ReD+

L. Pandola·P. Agnes·I. Ahmad·S. Albergo·I. Albuquerque·M. Atzori Corona·M. Ave·B. Bottino·M. Cadeddu·A. Caminata·N. Canci·M. Caravati·L. Consiglio·S. Davini·M. De Napoli·L. K. S. Dias·G. Dolganov·G. Fiorillo·D. Franco·M. Gulino·T. Hessel·N. Kemmerich·M. Kimura·M. Kuźniak·M. La Commara·J. Machts·G. Matteucci·E. Moura Santos·E. Nikoloudaki·V. Oleynikov·R. Perez Varona·N. Pino·S. M. R. Puglia·M. Rescigno·D. Sablone·B. Sales Costa·S. Sanfilippo·C. Sunny·Y. Suvorov·R. Tartaglia·G. Testera·A. Tricomi·M. Wada·Y. Wang·R. Wojaczyński·P. Zakhary
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Abstract

The ReD experiment measured the ionization yield Qy of argon for nuclear recoils in the 2-10 keV range using a dual-phase Time Projection Chamber irradiated with neutrons from a Cf-252 fission source. The measurement extends coverage below 7 keV, confirms consistency with previous data above 7 keV, and indicates a higher Qy at lower energies. These results are relevant for argon-based experiments searching for dark matter in the form of low-mass Weakly Interacting Massive Particles, which are very sensitive to the modeling of the detector response in this energy range.

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L. Pandola, P. Agnes, I. Ahmad, S. Albergo, I. Albuquerque, M. Atzori Corona, M. Ave, B. Bottino, M. Cadeddu, A. Caminata, N. Canci, M. Caravati, L. Consiglio, S. Davini, M. De Napoli, L. K. S. Dias, G. Dolganov, G. Fiorillo, D. Franco, M. Gulino, T. Hessel, N. Kemmerich, M. Kimura, M. Kuźniak, M. La Commara, J. Machts, G. Matteucci, E. Moura Santos, E. Nikoloudaki, V. Oleynikov, R. Perez Varona, N. Pino, S. M. R. Puglia, M. Rescigno, D. Sablone, B. Sales Costa, S. Sanfilippo, C. Sunny, Y. Suvorov, R. Tartaglia, G. Testera, A. Tricomi, M. Wada, Y. Wang, R. Wojaczyński, P. Zakhary. 2026-02-16. Characterization of argon recoils at the keV scale with ReD and ReD+. https://doi.org/10.1088/1748-0221/21/04/c04050

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