Cosmic Ray Measurements Using Charge and Light Readout in a Pixelated Liquid Argon Time Projection Chamber

SoLAr Collaboration; N. Anfimov; A. Branca; J. Bürgi; L. Calivers; P. Carniti; E. Calvo; E. Cristaldo; C. Cuesta; F. Declich; R. Diurba; P. Dunne; D. A. Dwyer; J. Evans; A. C. Ezeribe; A. Gauch; I. Gil-Botella; C. Gotti; S. Greenberg; D. Guffanti; A. Karcher; J. Kunzmann; N. Lane; S. Manthey Corchado; N. McConkey; A. Minotti; A. Navrer-Agasson; S. Parsa; G. Pessina; G. Ruiz Ferreira; B. Russell; S. Söldner-Rembold; A. M. Szelc; A. Tapper; F. Terranova; C. Tognina; D. Trotta; S. Tufanli; H. Vieira de Souza; G. Vitti Stenico; A. Verdugo; M. Weber; I. Xiotidis

arXiv · 2512.10830

Cosmic Ray Measurements Using Charge and Light Readout in a Pixelated Liquid Argon Time Projection Chamber

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Abstract

Liquid argon time projection chambers have emerged as a competitive technology for detecting solar neutrinos. The SoLAr collaboration was formed to explore argon detectors with pixelated light and charge readout, aiming for high detection efficiency and improved energy resolution. Building on the success of an initial prototype, we present results obtained with a second SoLAr prototype (V2), a $30 \times 30 \times 30$ cm$^{3}$ time projection chamber operated in a cryostat containing several hundred kilograms of liquid argon. We report measurements of cosmic-ray muons using both tracking and calorimetry from light and charge sensors, and we highlight the improved performance achieved through combined charge and light reconstruction. These results demonstrate the promise of dual-readout detectors and motivate future prototyping efforts toward kiloton-scale facilities.

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SoLAr Collaboration, N. Anfimov, A. Branca, J. Bürgi, L. Calivers, P. Carniti, E. Calvo, E. Cristaldo, C. Cuesta, F. Declich, R. Diurba, P. Dunne, D. A. Dwyer, J. Evans, A. C. Ezeribe, A. Gauch, I. Gil-Botella, C. Gotti, S. Greenberg, D. Guffanti, A. Karcher, J. Kunzmann, N. Lane, S. Manthey Corchado, N. McConkey, A. Minotti, A. Navrer-Agasson, S. Parsa, G. Pessina, G. Ruiz Ferreira, B. Russell, S. Söldner-Rembold, A. M. Szelc, A. Tapper, F. Terranova, C. Tognina, D. Trotta, S. Tufanli, H. Vieira de Souza, G. Vitti Stenico, A. Verdugo, M. Weber, I. Xiotidis. 2025-12-11. Cosmic Ray Measurements Using Charge and Light Readout in a Pixelated Liquid Argon Time Projection Chamber. https://arxiv.org/abs/2512.10830

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