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arXiv · 2403.07266

Search for $CP$-Violating Neutrino Nonstandard Interactions with the NOvA Experiment

NOvA Collaboration·M. A. Acero·B. Acharya·P. Adamson·L. Aliaga·N. Anfimov·A. Antoshkin·E. Arrieta-Diaz·L. Asquith·A. Aurisano·A. Back·N. Balashov·P. Baldi·B. A. Bambah·A. Bat·K. Bays·R. Bernstein·T. J. C. Bezerra·V. Bhatnagar·D. Bhattarai·B. Bhuyan·J. Bian·A. C. Booth·R. Bowles·B. Brahma·C. Bromberg·N. Buchanan·A. Butkevich·S. Calvez·T. J. Carroll·E. Catano-Mur·J. P. Cesar·A. Chatla·S. Chaudhary·R. Chirco·B. C. Choudhary·A. Christensen·M. F. Cicala·T. E. Coan·A. Cooleybeck·C. Cortes-Parra·D. Coveyou·L. Cremonesi·G. S. Davies·P. F. Derwent·Z. Djurcic·M. Dolce·D. Doyle·D. Dueñas Tonguino·E. C. Dukes·A. Dye·R. Ehrlich·E. Ewart·P. Filip·J. Franc·M. J. Frank·H. R. Gallagher·F. Gao·A. Giri·R. A. Gomes·M. C. Goodman·M. Groh·R. Group·A. Habig·F. Hakl·J. Hartnell·R. Hatcher·M. He·K. Heller·V Hewes·A. Himmel·Y. Ivaneev·A. Ivanova·B. Jargowsky·J. Jarosz·C. Johnson·M. Judah·I. Kakorin·D. M. Kaplan·A. Kalitkina·J. Kleykamp·O. Klimov·L. W. Koerner·L. Kolupaeva·R. Kralik·A. Kumar·C. D. Kuruppu·V. Kus·T. Lackey·K. Lang·J. Lesmeister·A. Lister·J. Liu·J. A. Lock·M. Lokajicek·M. MacMahon·S. Magill·W. A. Mann·M. T. Manoharan·M. Manrique Plata
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Abstract

This Letter reports a search for charge-parity ($CP$) symmetry violating nonstandard interactions (NSI) of neutrinos with matter using the NOvA Experiment, and examines their effects on the determination of the standard oscillation parameters. Data from $\nu_{\mu}(\bar{\nu}_{\mu})\rightarrow\nu_{\mu}(\bar{\nu}_{\mu})$ and $\nu_{\mu}(\bar{\nu}_{\mu})\rightarrow\nu_{e}(\bar{\nu}_{e})$ oscillation channels are used to measure the effect of the NSI parameters $\varepsilon_{e\mu}$ and $\varepsilon_{e\tau}$. With 90% CL the magnitudes of the NSI couplings are constrained to be $|\varepsilon_{e\mu}| \, \lesssim 0.3$ and $|\varepsilon_{e\tau}| \, \lesssim 0.4$. A degeneracy at $|\varepsilon_{e\tau}| \, \approx 1.8$ is reported, and we observe that the presence of NSI limits sensitivity to the standard $CP$ phase $\delta_{\tiny\text{CP}}$.

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NOvA Collaboration, M. A. Acero, B. Acharya, P. Adamson, L. Aliaga, N. Anfimov, A. Antoshkin, E. Arrieta-Diaz, L. Asquith, A. Aurisano, A. Back, N. Balashov, P. Baldi, B. A. Bambah, A. Bat, K. Bays, R. Bernstein, T. J. C. Bezerra, V. Bhatnagar, D. Bhattarai, B. Bhuyan, J. Bian, A. C. Booth, R. Bowles, B. Brahma, C. Bromberg, N. Buchanan, A. Butkevich, S. Calvez, T. J. Carroll, E. Catano-Mur, J. P. Cesar, A. Chatla, S. Chaudhary, R. Chirco, B. C. Choudhary, A. Christensen, M. F. Cicala, T. E. Coan, A. Cooleybeck, C. Cortes-Parra, D. Coveyou, L. Cremonesi, G. S. Davies, P. F. Derwent, Z. Djurcic, M. Dolce, D. Doyle, D. Dueñas Tonguino, E. C. Dukes, A. Dye, R. Ehrlich, E. Ewart, P. Filip, J. Franc, M. J. Frank, H. R. Gallagher, F. Gao, A. Giri, R. A. Gomes, M. C. Goodman, M. Groh, R. Group, A. Habig, F. Hakl, J. Hartnell, R. Hatcher, M. He, K. Heller, V Hewes, A. Himmel, Y. Ivaneev, A. Ivanova, B. Jargowsky, J. Jarosz, C. Johnson, M. Judah, I. Kakorin, D. M. Kaplan, A. Kalitkina, J. Kleykamp, O. Klimov, L. W. Koerner, L. Kolupaeva, R. Kralik, A. Kumar, C. D. Kuruppu, V. Kus, T. Lackey, K. Lang, J. Lesmeister, A. Lister, J. Liu, J. A. Lock, M. Lokajicek, M. MacMahon, S. Magill, W. A. Mann, M. T. Manoharan, M. Manrique Plata. 2024-03-12. Search for $CP$-Violating Neutrino Nonstandard Interactions with the NOvA Experiment. https://doi.org/10.1103/physrevlett.133.201802

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