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arXiv · 2512.19788

Coherent Elastic Neutrino-Nucleus Scattering at the Japan Proton Accelerator Research Complex

J. I. Collar·Ivan Esteban·J. J. Gomez-Cadenas·M. C. Gonzalez-Garcia·L. Ji·L. Larizgoitia·C. M. Lewis·F. Monrabal·João Paulo Pinheiro·A. Simón·S. G. Yoon
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Abstract

The Japan Proton Accelerator Research Complex (J-PARC) currently delivers a 1 MW, 3 GeV proton beam to the Materials and Life Science Experimental Facility (MLF). Power is expected to increase to 1.3 MW, driven by the needs of Hyper-Kamiokande. As a result, the MLF presently provides the highest neutron yield of any spallation source, while potentially holding the best current and foreseeable conditions for Coherent Elastic Neutrino-Nucleus Scattering (CE$\nu$NS) experimentation. We explore this potential, using as examples detector technologies presently funded for construction and under development. We quantify their sensitivity to a rich variety of particle physics scenarios, finding that very-high-statistics CE$\nu$NS measurements with significant sensitivity to relevant scenarios are feasible at this facility within the next few years.

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J. I. Collar, Ivan Esteban, J. J. Gomez-Cadenas, M. C. Gonzalez-Garcia, L. Ji, L. Larizgoitia, C. M. Lewis, F. Monrabal, João Paulo Pinheiro, A. Simón, S. G. Yoon. 2025-12-22. Coherent Elastic Neutrino-Nucleus Scattering at the Japan Proton Accelerator Research Complex. https://arxiv.org/abs/2512.19788

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