Browsing by Author "JingHan Chen"

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First experimental constraints on WIMP couplings in the effective field theory framework from CDEX
(Science in China Press, 2021) Yi Wang; Zhi Zeng; Qian Yue; LiTao Yang; KeJun Kang; YuanJing Li; Mehment Ağartioğlu; HaiPeng An; JianPing Chang; JingHan Chen; YunHua Chen; JianPing Cheng; Cheng Yi Chiang; WenHan Dai; Zhi Deng; ChangHao Fang; XinPing Geng; Hui Gong; QiuJu Guo; XuYuan Guo; HongJian He; Li He; ShengMing He; JinWei Hu; TuChen Huang; HanXiong Huang; HaiTao Jia; LiPing Jia; Xi Jiang; HauBin Li; JianMin Li; Jin Li; MingXuan Li; RenMingJie Li; Xia Li; YuLan Li; Bin Liao; FongKay Lin; ShinTed Lin; ShuKui Liu; YanDong Liu; Yu Liu; YuanYuan Liu; ZhongZhi Liu; Hao Ma; YuCai Mao; QiYuan Nie; JinHua Ning; Hui Pan; NingChun Qi; Jie Ren; XiChao Ruan; ChangSong Shang; Vivek Sharma; Ze She; Lakhwinder Singh; Monoj Kumar Singh; TianXi Sun; ChangJian Tang; WeiYou Tang; Yang Tian; GuangFu Wang; Li Wang; Qing Wang; YuChen Wang; YunXiang Wang; Zhen Wang; Henry Tsz-King Wong; ShiYong Wu; YuCheng Wu; HaoYang Xing; Yin Xu; Tao Xue; YuLu Yan; Nan Yi; ChunXu Yu; HaiJun Yu; JianFeng Yue; Ming Zeng; BingTao Zhang; Lei Zhang; FengShou Zhang; ZhenYu Zhang; KangKang Zhao; MingGang Zhao; JiFang Zhou; ZuYing Zhou; JingJun Zhu
We present weakly interacting massive particles (WIMPs) search results performed using two approaches of effective field theory from the China Dark Matter Experiment (CDEX), based on the data from both CDEX-1B and CDEX-10 stages. In the nonrelativistic effective field theory approach, both time-integrated and annual modulation analyses were used to set new limits for the coupling of WIMP-nucleon effective operators at 90% confidence level (C.L.) and improve over the current bounds in the low mχregion. In the chiral effective field theory approach, data from CDEX-10 were used to set an upper limit on WIMP-pion coupling at 90% C.L. We for the first time extended the limit to the mχ < 6 GeV/c2 region. © 2021, Science China Press and Springer-Verlag GmbH Germany, part of Springer Nature.
New Limits on the Coherent Neutrino-Nucleus Elastic Scattering Cross Section at the Kuo-Sheng Reactor-Neutrino Laboratory
(American Physical Society, 2025) S. Karmakar; Manoj Kumar Singh; Vivek Sharma; Henry Tsz King Wong; C. Greeshma; Haubin Li; Lakhwinder Singh; Mehment Ağartıoğlu; JingHan Chen; C. I. Chiang; Muhammed Deniz; H. C. Hsu; S. KaradaÇ; V. Kumar; C. H. Leung; Jianmin Li; Fong Kay Lin; Shinted Lin; Shukui Liu; Hao Ma; Kapil Saraswat; M. K. Singh; Venktesh Singh; D. Tanabe; Jiashian Wang; Litao Yang; C. H. Yeh; Qian Yue
Neutrino-nucleus elastic scattering (νAel) with partial quantum-mechanical coherency has been observed in several nuclei with neutrinos from decay-At-rest pions. This interaction with reactor neutrinos where coherency is >95% has not yet been experimentally observed. We present new results on the studies of the νAel cross section with an electrocooled p-Type point-contact germanium detector at the Kuo-Sheng Reactor Neutrino Laboratory. A total of 242(357) kg-days of Reactor ON(OFF) data at a detector threshold of 200 eV in ionization energy are analyzed. The Lindhard model parametrized by a single variable k which characterizes the quenching function was used. A limit at 90% confidence level of ρ<4.7 at the predicted value of k=0.162 is derived, where ρ is the ratio of the measured to standard model (SM) cross section. Conversely, k<0.288 at the SM value of ρ=1. © 2025 American Physical Society.
Performances of a prototype point-contact germanium detector immersed in liquid nitrogen for light dark matter search
(Science in China Press, 2019) Hao Jiang; LiTao Yang; Qian Yue; KeJun Kang; JianPing Cheng; YuanJing Li; Henry Tsz-King Wong; M. Ağartioğlu; HaiPeng An; JianPing Chang; JingHan Chen; YunHua Chen; Zhi Deng; Qiang Du; Hui Gong; Li He; JinWei Hu; QingDong Hu; HanXiong Huang; LiPing Jia; HauBin Li; Hong Li; JianMin Li; Jin Li; Xia Li; XueQian Li; YuLan Li; Bin Liao; FongKay Lin; ShinTed Lin; ShuKui Liu; YanDong Liu; YuanYuan Liu; ZhongZhi Liu; Hao Ma; JingLu Ma; Hui Pan; Jie Ren; XiChao Ruan; B. Sevda; Vivek Sharma; ManBin Shen; Lakhwinder Singh; Monoj Kumar Singh; TianXi Sun; ChangJian Tang; WeiYou Tang; Yang Tian; GuangFu Wang; JiMin Wang; Li Wang; Qing Wang; Yi Wang; ShiYong Wu; YuCheng Wu; HaoYang Xing; Yin Xu; Tao Xue; SongWei Yang; Nan Yi; ChunXu Yu; HaiJun Yu; JianFeng Yue; XiongHui Zeng; Ming Zeng; Zhi Zeng; FengShou Zhang; YunHua Zhang; MingGang Zhao; JiFang Zhou; ZuYing Zhou; JingJun Zhu; ZhongHua Zhu
The CDEX-10 experiment searches for light weakly interacting massive particles, a form of dark matter, at the China Jinping Underground Laboratory, where approximately 10 kg of germanium detectors are arranged in an array and immersed in liquid nitrogen. Herein, we report on the experimental apparatus, detector characterization, and spectrum analysis of one prototype detector. Owing to the higher rise-time resolution of the CDEX-10 prototype detector as compared with CDEX-1B, we identified the origin of an observed category of extremely fast events. For data analysis of the CDEX-10 prototype detector, we introduced and applied an improved bulk/surface event discrimination method. The results of the new method were compared to those of the CDEX-1B spectrum. Both sets of results showed good consistency in the 0–12 keVee energy range, except for the 8.0 keV K-shell X-ray peak from the external copper. © 2018, Science China Press and Springer-Verlag GmbH Germany, part of Springer Nature.