PandaX-4T中 $^{136}$Xe 双β衰变精确测量及其对核矩阵元与Majoron的影响
核实验
2026-04-29 v2 高能物理 - 实验
摘要
双β衰变()的连续谱提供了灵敏的探针，用于检验标准模型的预测并探寻其超出标准模型的新物理信号。我们对 Xe 谱进行全面分析，利用39.1 \pm 0.7~kg\cdot yr的 Xe 曝露来自PandaX-4T 实验。分析结果给出当今最精确的 Xe 两中性子双β衰变()半衰期测量值为年，其不确定性较我们上述结果降低了约为2倍。我们测量参数，定义为 Xe 核矩阵元次要分量与主分量之比，值为，与理论预测一致。我们还搜索 Xe 的Majoron 衰变模式，确立了谱指数n=7的最严格限制。
引用
@article{arxiv.2512.04849,
title = {Precise $^{136}$Xe Double Beta Decay Measurement in PandaX-4T with Implications on the Nuclear Matrix Elements and Majorons},
author = {PandaX Collaboration and Zhe Yuan and Zihao Bo and Wei Chen and Xun Chen and Yunhua Chen and Chen Cheng and Xiangyi Cui and Manna Deng and Yingjie Fan and Deqing Fang and Xuanye Fu and Zhixing Gao and Yujie Ge and Lisheng Geng and Karl Giboni and Xunan Guo and Xuyuan Guo and Zichao Guo and Chencheng Han and Ke Han and Changda He and Jinrong He and Houqi Huang and Junting Huang and Yule Huang and Ruquan Hou and Xiangdong Ji and Yonglin Ju and Xiaorun Lan and Chenxiang Li and Jiafu Li and Mingchuan Li and Peiyuan Li and Shuaijie Li and Tao Li and Yangdong Li and Zhiyuan Li and Qing Lin and Jianglai Liu and Yuanchun Liu and Congcong Lu and Xiaoying Lu and Lingyin Luo and Yunyang Luo and Yugang Ma and Yajun Mao and Yue Meng and Binyu Pang and Ningchun Qi and Zhicheng Qian and Xiangxiang Ren and Dong Shan and Xiaofeng Shang and Xiyuan Shao and Guofang Shen and Manbin Shen and Wenliang Sun and Xuyan Sun and Yi Tao and Yueqiang Tian and Yuxin Tian and Anqing Wang and Guanbo Wang and Hao Wang and Haoyu Wang and Jiamin Wang and Lei Wang and Meng Wang and Qiuhong Wang and Shaobo Wang and Shibo Wang and Siguang Wang and Wei Wang and Xu Wang and Zhou Wang and Yuehuan Wei and Weihao Wu and Yuan Wu and Mengjiao Xiao and Xiang Xiao and Kaizhi Xiong and Jianqin Xu and Yifan Xu and Shunyu Yao and Binbin Yan and Xiyu Yan and Yong Yang and Peihua Ye and Chunxu Yu and Ying Yuan and Youhui Yun and Xinning Zeng and Minzhen Zhang and Peng Zhang and Shibo Zhang and Siyuan Zhang and Shu Zhang and Tao Zhang and Wei Zhang and Yang Zhang and Yingxin Zhang and Yuanyuan Zhang and Li Zhao and Kangkang Zhao and Jifang Zhou and Jiaxu Zhou and Jiayi Zhou and Ning Zhou and Xiaopeng Zhou and Zhizhen Zhou and Chenhui Zhu and Dong-Liang Fang and Yu-Feng Li},
journal= {arXiv preprint arXiv:2512.04849},
year = {2026}
}
备注
8 pages, 4 figures