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Prospect of the NUCLEUS Experiment at Chooz for Coherent Elastic Neutrino-Nucleus Scattering and New Physics Searches

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Bibliographic Details
Main Authors:	Abele, H., Angloher, G., Arnold, B., Corona, M. Atzori, Bento, A., Bossio, E., Buchsteiner, F., Burkhart, J., Cappella, F., Cappelli, M., Casali, N., Cerulli, R., Cruciani, A., Del Castello, G., Roccagiovine, M. del Gallo, Dorer, S., Erhart, A., Friedl, M., Fichtinger, S., Ghete, V. M., Giammei, M., Goupy, C., Hakenmüller, J., Hauff, D., Jeanneau, F., Jericha, E., Kaznacheeva, M., Kluck, H., Langenkämper, A., Lasserre, T., Lhuillier, D., Mancuso, M., Martin, R., Mauri, B., Mazzolari, A., McCallin, L., Neyrial, H., Nones, C., Oberauer, L., Peters, L., Petricca, F., Potzel, W., Pröbst, F., Pucci, F., Reindl, F., Romagnoni, M., Rothe, J., Schermer, N., Schieck, J., Schönert, S., Schwertner, C., Scola, L., Soum-Sidikov, G., Stodolsky, L., Schröder, A., Strauss, R., Thalmeier, R., Tomei, C., Valla, L., Vignati, M., Vivier, M., Wallach, A., Wasser, P., Wex, A., Wienke, L.
Format:	Preprint
Published:	2026
Subjects:	High Energy Physics - Experiment High Energy Physics - Phenomenology
Online Access:	Acceder al recurso
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_version_	1866908913382719488
author	Abele, H. Angloher, G. Arnold, B. Corona, M. Atzori Bento, A. Bossio, E. Buchsteiner, F. Burkhart, J. Cappella, F. Cappelli, M. Casali, N. Cerulli, R. Cruciani, A. Del Castello, G. Roccagiovine, M. del Gallo Dorer, S. Erhart, A. Friedl, M. Fichtinger, S. Ghete, V. M. Giammei, M. Goupy, C. Hakenmüller, J. Hauff, D. Jeanneau, F. Jericha, E. Kaznacheeva, M. Kluck, H. Langenkämper, A. Lasserre, T. Lhuillier, D. Mancuso, M. Martin, R. Mauri, B. Mazzolari, A. McCallin, L. Neyrial, H. Nones, C. Oberauer, L. Peters, L. Petricca, F. Potzel, W. Pröbst, F. Pucci, F. Reindl, F. Romagnoni, M. Rothe, J. Schermer, N. Schieck, J. Schönert, S. Schwertner, C. Scola, L. Soum-Sidikov, G. Stodolsky, L. Schröder, A. Strauss, R. Thalmeier, R. Tomei, C. Valla, L. Vignati, M. Vivier, M. Wallach, A. Wasser, P. Wex, A. Wienke, L.
author_facet	Abele, H. Angloher, G. Arnold, B. Corona, M. Atzori Bento, A. Bossio, E. Buchsteiner, F. Burkhart, J. Cappella, F. Cappelli, M. Casali, N. Cerulli, R. Cruciani, A. Del Castello, G. Roccagiovine, M. del Gallo Dorer, S. Erhart, A. Friedl, M. Fichtinger, S. Ghete, V. M. Giammei, M. Goupy, C. Hakenmüller, J. Hauff, D. Jeanneau, F. Jericha, E. Kaznacheeva, M. Kluck, H. Langenkämper, A. Lasserre, T. Lhuillier, D. Mancuso, M. Martin, R. Mauri, B. Mazzolari, A. McCallin, L. Neyrial, H. Nones, C. Oberauer, L. Peters, L. Petricca, F. Potzel, W. Pröbst, F. Pucci, F. Reindl, F. Romagnoni, M. Rothe, J. Schermer, N. Schieck, J. Schönert, S. Schwertner, C. Scola, L. Soum-Sidikov, G. Stodolsky, L. Schröder, A. Strauss, R. Thalmeier, R. Tomei, C. Valla, L. Vignati, M. Vivier, M. Wallach, A. Wasser, P. Wex, A. Wienke, L.
contents	The NUCLEUS experiment aims to measure coherent elastic neutrino-nucleus scattering (CE$ν$NS) at unprecedentedly low nuclear recoil energies using gram-scale cryogenic calorimeters operated at the Chooz nuclear power plant in France. Access to recoil energies at the $\mathcal{O}(10~\mathrm{eV})$ scale enables CE$ν$NS studies at extremely low momentum transfer and provides enhanced sensitivity to new physics. In this work, we present sensitivity projections for the upcoming NUCLEUS technical and physics runs, incorporating a data-driven treatment of the low-energy excess (LEE) observed during commissioning. We develop a likelihood framework that exploits reactor-power variation to disentangle signal and background in a low signal-to-background regime and to assess the impact of the dominant systematic uncertainties. For the Technical Run with a 7 g CaWO$_4$ target, we find competitive sensitivity to several scenarios beyond the Standard Model, which do not require a CE$ν$NS observation. For the Physics Run, assuming complete suppression of the LEE, we project a 4.7 $σ$ observation of CE$ν$NS with a statistical precision of about 20 % in 1 year, enabling a determination of the weak mixing angle at the lowest momentum transfer probed to date with CE$ν$NS and leading CE$ν$NS-based constraints on the neutrino charge radius and new mediator models.
format	Preprint
id	arxiv_https___arxiv_org_abs_2603_24450
institution	arXiv
publishDate	2026
record_format	arxiv
spellingShingle	Prospect of the NUCLEUS Experiment at Chooz for Coherent Elastic Neutrino-Nucleus Scattering and New Physics Searches Abele, H. Angloher, G. Arnold, B. Corona, M. Atzori Bento, A. Bossio, E. Buchsteiner, F. Burkhart, J. Cappella, F. Cappelli, M. Casali, N. Cerulli, R. Cruciani, A. Del Castello, G. Roccagiovine, M. del Gallo Dorer, S. Erhart, A. Friedl, M. Fichtinger, S. Ghete, V. M. Giammei, M. Goupy, C. Hakenmüller, J. Hauff, D. Jeanneau, F. Jericha, E. Kaznacheeva, M. Kluck, H. Langenkämper, A. Lasserre, T. Lhuillier, D. Mancuso, M. Martin, R. Mauri, B. Mazzolari, A. McCallin, L. Neyrial, H. Nones, C. Oberauer, L. Peters, L. Petricca, F. Potzel, W. Pröbst, F. Pucci, F. Reindl, F. Romagnoni, M. Rothe, J. Schermer, N. Schieck, J. Schönert, S. Schwertner, C. Scola, L. Soum-Sidikov, G. Stodolsky, L. Schröder, A. Strauss, R. Thalmeier, R. Tomei, C. Valla, L. Vignati, M. Vivier, M. Wallach, A. Wasser, P. Wex, A. Wienke, L. High Energy Physics - Experiment High Energy Physics - Phenomenology The NUCLEUS experiment aims to measure coherent elastic neutrino-nucleus scattering (CE$ν$NS) at unprecedentedly low nuclear recoil energies using gram-scale cryogenic calorimeters operated at the Chooz nuclear power plant in France. Access to recoil energies at the $\mathcal{O}(10~\mathrm{eV})$ scale enables CE$ν$NS studies at extremely low momentum transfer and provides enhanced sensitivity to new physics. In this work, we present sensitivity projections for the upcoming NUCLEUS technical and physics runs, incorporating a data-driven treatment of the low-energy excess (LEE) observed during commissioning. We develop a likelihood framework that exploits reactor-power variation to disentangle signal and background in a low signal-to-background regime and to assess the impact of the dominant systematic uncertainties. For the Technical Run with a 7 g CaWO$_4$ target, we find competitive sensitivity to several scenarios beyond the Standard Model, which do not require a CE$ν$NS observation. For the Physics Run, assuming complete suppression of the LEE, we project a 4.7 $σ$ observation of CE$ν$NS with a statistical precision of about 20 % in 1 year, enabling a determination of the weak mixing angle at the lowest momentum transfer probed to date with CE$ν$NS and leading CE$ν$NS-based constraints on the neutrino charge radius and new mediator models.
title	Prospect of the NUCLEUS Experiment at Chooz for Coherent Elastic Neutrino-Nucleus Scattering and New Physics Searches
topic	High Energy Physics - Experiment High Energy Physics - Phenomenology
url	https://arxiv.org/abs/2603.24450