Search for exotic interactions of solar neutrinos in the CDEX-10 experiment
X. P. Geng, L. T. Yang, Q. Yue, K. Kang, Y. J. Li, Haipeng An, C. Greeshma, Jianping Chang, Y. H. Chen, J. Cheng, W. H. Dai, Z. Deng, C. H. Fang, Haipeng Gong, Q. Guo, Xiangbo Guo, Long He, S. M. He, J. Hu, Han‐Xiong Huang, T. Huang, Hai-Tao Jia, Xi Jiang, S. Karmakar, H. B. Li, J. M. Li, J. Li, Q. Y. Li, R. M. J. Li, X. Q. Li, Y. L. Li, Y. F. Liang, Bin Liao, F. K. Lin, S. T. Lin, J. X. Liu, S. K. Liu, Y. D. Liu, Y. Liu, Y. Y. Liu, Z. Z. Liu, Haitao Ma, Yajun Mao, Q. Y. Nie, J. H. Ning, H. Pan, Ningchun Qi, J. Ren, Xichao Ruan, Z. She, M. K. Singh, Tao Sun, C. J. Tang, W. Y. Tang, Y. Tian, G. F. Wang, Lingling Wang, Qing Wang, Y. F. Wang, Yan Wang, H. T. Wong, Yongcheng Wu, Y. C. Wu, Haoyang Xing, R. Xu, Y. Xu, Tao Xue, Yulu Yan, Yi Nan, C. X. Yu, H. J. Yu, J. F. Yue, M. Zeng, Zhi Zeng, B. T. Zhang, F. S. Zhang, L. Zhang, Z. H. Zhang, Z. Y. Zhang, K. K. Zhao, M. G. Zhao, Jifang Zhou, Z. Y. Zhou, J. J. Zhu, Y. C. Wu
Abstract
We investigate exotic neutrino interactions using the $205.4\text{\ensuremath{-}}\mathrm{kg}\ifmmode\cdot\else\textperiodcentered\fi{}\mathrm{day}$ dataset from the CDEX-10 experiment at the China Jinping Underground Laboratory. New constraints on the mass and couplings of new gauge bosons are presented. Two nonstandard neutrino interactions are considered: a $U(1{)}_{\mathrm{B}--\mathrm{L}}$ gauge-boson-induced interaction between an active neutrino and electron/nucleus, and a dark-photon-induced interaction between a sterile neutrino and electron/nucleus via kinetic mixing with a photon. This work probes an unexplored parameter space involving sterile neutrino coupling with a dark photon. New laboratory limits are derived on dark photon masses below $1\text{ }\text{ }\mathrm{eV}/{c}^{2}$ at some benchmark values of $\mathrm{\ensuremath{\Delta}}{m}_{41}^{2}$ and ${g}^{\ensuremath{'}2}{\mathrm{sin}}^{2}2{\ensuremath{\theta}}_{14}$.