Browsing by Author "H.P. An"

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Constraints on Spin-Independent Nucleus Scattering with sub-GeV Weakly Interacting Massive Particle Dark Matter from the CDEX-1B Experiment at the China Jinping Underground Laboratory
(American Physical Society, 2019) Z.Z. Liu; Q. Yue; L.T. Yang; K.J. Kang; Y.J. Li; H.T. Wong; M. Agartioglu; H.P. An; J.P. Chang; J.H. Chen; Y.H. Chen; J.P. Cheng; Z. Deng; Q. Du; H. Gong; X.Y. Guo; Q.J. Guo; L. He; S.M. He; J.W. Hu; Q.D. Hu; H.X. Huang; L.P. Jia; H. Jiang; H.B. Li; H. Li; J.M. Li; J. Li; X. Li; X.Q. Li; Y.L. Li; B. Liao; F.K. Lin; S.T. Lin; S.K. Liu; Y.D. Liu; Y.Y. Liu; H. Ma; J.L. Ma; Y.C. Mao; J.H. Ning; H. Pan; N.C. Qi; J. Ren; X.C. Ruan; V. Sharma; Z. She; L. Singh; M.K. Singh; T.X. Sun; C.J. Tang; W.Y. Tang; Y. Tian; G.F. Wang; L. Wang; Q. Wang; Y. Wang; Y.X. Wang; S.Y. Wu; Y.C. Wu; H.Y. Xing; Y. Xu; T. Xue; N. Yi; C.X. Yu; H.J. Yu; J.F. Yue; M. Zeng; Z. Zeng; F.S. Zhang; M.G. Zhao; J.F. Zhou; Z.Y. Zhou; J.J. Zhu
We report results on the searches of weakly interacting massive particles (WIMPs) with sub-GeV masses (mχ) via WIMP-nucleus spin-independent scattering with Migdal effect incorporated. Analysis on time-integrated (TI) and annual modulation (AM) effects on CDEX-1B data are performed, with 737.1 kg day exposure and 160 eVee threshold for TI analysis, and 1107.5 kg day exposure and 250 eVee threshold for AM analysis. The sensitive windows in mχ are expanded by an order of magnitude to lower DM masses with Migdal effect incorporated. New limits on σχNSI at 90% confidence level are derived as 2×10-32∼7×10-35 cm2 for TI analysis at mχ∼50-180 MeV/c2, and 3×10-32∼9×10-38 cm2 for AM analysis at mχ∼75 MeV/c2-3.0 GeV/c2. .
Constraints on sub-GeV dark matter boosted by cosmic rays from the CDEX-10 experiment at the China Jinping Underground Laboratory
(American Physical Society, 2022) R. Xu; L.T. Yang; Q. Yue; K.J. Kang; Y.J. Li; M. Agartioglu; H.P. An; J.P. Chang; Y.H. Chen; J.P. Cheng; W.H. Dai; Z. Deng; C.H. Fang; X.P. Geng; H. Gong; X.Y. Guo; Q.J. Guo; L. He; S.M. He; J.W. Hu; H.X. Huang; T.C. Huang; H.T. Jia; X. Jiang; H.B. Li; J.M. Li; J. Li; Q.Y. Li; R.M.J. Li; X.Q. Li; Y.L. Li; Y.F. Liang; B. Liao; F.K. Lin; S.T. Lin; S.K. Liu; Y. Liu; Y.D. Liu; Y.Y. Liu; Z.Z. Liu; H. Ma; Y.C. Mao; Q.Y. Nie; J.H. Ning; H. Pan; N.C. Qi; J. Ren; X.C. Ruan; K. Saraswat; V. Sharma; Z. She; M.K. Singh; T.X. Sun; C.J. Tang; W.Y. Tang; Y. Tian; G.F. Wang; L. Wang; Q. Wang; Y. Wang; Y.X. Wang; H.T. Wong; S.Y. Wu; Y.C. Wu; H.Y. Xing; Y. Xu; T. Xue; Y.L. Yan; C.H. Yeh; N. Yi; C.X. Yu; H.J. Yu; J.F. Yue; M. Zeng; Z. Zeng; B.T. Zhang; F.S. Zhang; L. Zhang; Z.H. Zhang; Z.Y. Zhang; K.K. Zhao; M.G. Zhao; J.F. Zhou; Z.Y. Zhou; J.J. Zhu
We present new constraints on light dark matter boosted by cosmic rays (CRDM) using the 205.4 kg day data of the CDEX-10 experiment conducted at the China Jinping Underground Laboratory. The Monte Carlo simulation package cjpl_ess was employed to evaluate the Earth shielding effect. Several key factors have been introduced and discussed in our CRDM analysis, including the contributions from heavier CR nuclei than proton and helium, the inhomogeneity of CR distribution, and the impact of the form factor in the Earth attenuation calculation. Our result excludes the dark matter-nucleon elastic scattering cross section region from 1.7×10-30 to 10-26 cm2 for dark matter of 10 keV/c2 to 1 GeV/c2. © 2022 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.
Constraints on Sub-GeV Dark Matter-Electron Scattering from the CDEX-10 Experiment
(American Physical Society, 2022) Z.Y. Zhang; L.T. Yang; Q. Yue; K.J. Kang; Y.J. Li; M. Agartioglu; H.P. An; J.P. Chang; Y.H. Chen; J.P. Cheng; W.H. Dai; Z. Deng; C.H. Fang; X.P. Geng; H. Gong; Q.J. Guo; X.Y. Guo; L. He; S.M. He; J.W. Hu; H.X. Huang; T.C. Huang; H.T. Jia; X. Jiang; H.B. Li; J.M. Li; J. Li; Q.Y. Li; R.M.J. Li; X.Q. Li; Y.L. Li; Y.F. Liang; B. Liao; F.K. Lin; S.T. Lin; S.K. Liu; Y.D. Liu; Y. Liu; Y.Y. Liu; Z.Z. Liu; H. Ma; Y.C. Mao; Q.Y. Nie; J.H. Ning; H. Pan; N.C. Qi; J. Ren; X.C. Ruan; K. Saraswat; V. Sharma; Z. She; M.K. Singh; T.X. Sun; C.J. Tang; W.Y. Tang; Y. Tian; G.F. Wang; L. Wang; Q. Wang; Y. Wang; Y.X. Wang; H.T. Wong; S.Y. Wu; Y.C. Wu; H.Y. Xing; R. Xu; Y. Xu; T. Xue; Y.L. Yan; C.H. Yeh; N. Yi; C.X. Yu; H.J. Yu; J.F. Yue; M. Zeng; Z. Zeng; B.T. Zhang; F.S. Zhang; L. Zhang; Z.H. Zhang; K.K. Zhao; M.G. Zhao; J.F. Zhou; Z.Y. Zhou; J.J. Zhu
We present improved germanium-based constraints on sub-GeV dark matter via dark matter-electron (?-e) scattering using the 205.4 kg·day dataset from the CDEX-10 experiment. Using a novel calculation technique, we attain predicted ?-e scattering spectra observable in high-purity germanium detectors. In the heavy mediator scenario, our results achieve 3 orders of magnitude of improvement for m? larger than 80 MeV/c2 compared to previous germanium-based ?-e results. We also present the most stringent ?-e cross-section limit to date among experiments using solid-state detectors for m? larger than 90 MeV/c2 with heavy mediators and m? larger than 100 MeV/c2 with electric dipole coupling. The result proves the feasibility and demonstrates the vast potential of a new ?-e detection method with high-purity germanium detectors in ultralow radioactive background. © 2022 authors. Published by the American Physical Society.
Direct Detection Constraints on Dark Photons with the CDEX-10 Experiment at the China Jinping Underground Laboratory
(American Physical Society, 2020) Z. She; L.P. Jia; Q. Yue; H. Ma; K.J. Kang; Y.J. Li; M. Agartioglu; H.P. An; J.P. Chang; J.H. Chen; Y.H. Chen; J.P. Cheng; W.H. Dai; Z. Deng; X.P. Geng; H. Gong; P. Gu; Q.J. Guo; X.Y. Guo; L. He; S.M. He; H.T. He; J.W. Hu; T.C. Huang; H.X. Huang; H.B. Li; H. Li; J.M. Li; J. Li; M.X. Li; X. Li; X.Q. Li; Y.L. Li; B. Liao; F.K. Lin; S.T. Lin; S.K. Liu; Y.D. Liu; Y.Y. Liu; Z.Z. Liu; Y.C. Mao; Q.Y. Nie; J.H. Ning; H. Pan; N.C. Qi; C.K. Qiao; J. Ren; X.C. Ruan; B. Sevda; C.S. Shang; V. Sharma; L. Singh; M.K. Singh; T.X. Sun; C.J. Tang; W.Y. Tang; Y. Tian; G.F. Wang; L. Wang; Q. Wang; Y. Wang; Y.X. Wang; Z. Wang; H.T. Wong; S.Y. Wu; H.Y. Xing; Y. Xu; T. Xue; Y.L. Yan; L.T. Yang; N. Yi; C.X. Yu; H.J. Yu; J.F. Yue; M. Zeng; Z. Zeng; B.T. Zhang; L. Zhang; F.S. Zhang; Z.Y. Zhang; M.G. Zhao; J.F. Zhou; Z.Y. Zhou; J.J. Zhu
We report constraints on the dark photon effective kinetic mixing parameter (κ) with data taken from two p-type point-contact germanium detectors of the CDEX-10 experiment at the China Jinping Underground Laboratory. The 90% confidence level upper limits on κ of solar dark photon from 205.4 kg-day exposure are derived, probing new parameter space with masses (mV) from 10 to 300 eV/c2 in direct detection experiments. Considering dark photon as the cosmological dark matter, limits at 90% confidence level with mV from 0.1 to 4.0 keV/c2 are set from 449.6 kg-day data, with a minimum of κ=1.3×10-15 at mV=200 eV/c2. © 2020 authors. Published by the American Physical Society.
Exotic Dark Matter Search with the CDEX-10 Experiment at China's Jinping Underground Laboratory
(American Physical Society, 2022) W.H. Dai; L.P. Jia; H. Ma; Q. Yue; K.J. Kang; Y.J. Li; H.P. An; C. Greeshma; J.P. Chang; Y.H. Chen; J.P. Cheng; Z. Deng; C.H. Fang; X.P. Geng; H. Gong; Q.J. Guo; X.Y. Guo; L. He; S.M. He; J.W. Hu; H.X. Huang; T.C. Huang; H.T. Jia; X. 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; B. Liao; F.K. Lin; S.T. Lin; S.K. Liu; Y.D. Liu; Y. Liu; Y.Y. Liu; Z.Z. Liu; Y.C. Mao; Q.Y. Nie; J.H. Ning; H. Pan; N.C. Qi; J. Ren; X.C. Ruan; Z. She; M.K. Singh; T.X. Sun; C.J. Tang; W.Y. Tang; Y. Tian; G.F. Wang; L. Wang; Q. Wang; Y. Wang; Y.X. Wang; H.T. Wong; S.Y. Wu; Y.C. Wu; H.Y. Xing; R. Xu; Y. Xu; T. Xue; Y.L. Yan; L.T. Yang; N. Yi; C.X. Yu; H.J. Yu; J.F. Yue; M. Zeng; Z. Zeng; B.T. Zhang; F.S. Zhang; L. Zhang; Z.H. Zhang; Z.Y. Zhang; K.K. Zhao; M.G. Zhao; J.F. Zhou; Z.Y. Zhou; J.J. Zhu
A search for exotic dark matter (DM) in the sub-GeV mass range has been conducted using 205 kg day data taken from a p-type point contact germanium detector of the CDEX-10 experiment at China's Jinping underground laboratory. New low-mass dark matter searching channels, neutral current fermionic DM absorption (?+A+A) and DM-nucleus 3?2 scattering (?+?+A+A), have been analyzed with an energy threshold of 160 eVee. No significant signal was found; thus new limits on the DM-nucleon interaction cross section are set for both models at the sub-GeV DM mass region. A cross section limit for the fermionic DM absorption is set to be 2.5×10-46 cm2 (90% C.L.) at DM mass of 10 MeV/c2. For the DM-nucleus 3?2 scattering scenario, limits are extended to DM mass of 5 and 14 MeV/c2 for the massless dark photon and bound DM final state, respectively. © 2022 authors. Published by the American Physical Society.
Experimental Limits on Solar Reflected Dark Matter with a New Approach on Accelerated-Dark-Matter-Electron Analysis in Semiconductors
(American Physical Society, 2024) Z.Y. Zhang; L.T. Yang; Q. Yue; K.J. Kang; Y.J. Li; H.P. An; C. Greeshma; J.P. Chang; Y.H. Chen; J.P. Cheng; W.H. Dai; Z. Deng; C.H. Fang; X.P. Geng; H. Gong; Q.J. Guo; T. Guo; X.Y. Guo; L. He; S.M. He; J.W. Hu; H.X. Huang; T.C. Huang; L. Jiang; S. Karmakar; H.B. Li; H.Y. Li; J.M. Li; J. Li; Q.Y. Li; R.M.J. Li; X.Q. Li; Y.L. Li; Y.F. Liang; B. Liao; F.K. Lin; S.T. Lin; J.X. Liu; S.K. Liu; Y.D. Liu; Y. Liu; Y.Y. Liu; H. Ma; Y.C. Mao; Q.Y. Nie; J.H. Ning; H. Pan; N.C. Qi; J. Ren; X.C. Ruan; M.K. Singh; T.X. Sun; C.J. Tang; Y. Tian; G.F. Wang; J.Z. Wang; L. Wang; Q. Wang; Y.F. Wang; Y.X. Wang; H.T. Wong; S.Y. Wu; Y.C. Wu; H.Y. Xing; R. Xu; Y. Xu; T. Xue; Y.L. Yan; N. Yi; C.X. Yu; H.J. Yu; J.F. Yue; M. Zeng; Z. Zeng; B.T. Zhang; F.S. Zhang; L. Zhang; Z.H. Zhang; J.Z. Zhao; K.K. Zhao; M.G. Zhao; J.F. Zhou; Z.Y. Zhou; J.J. Zhu
Recently a dark matter-electron (DM-electron) paradigm has drawn much attention. Models beyond the standard halo model describing DM accelerated by high energy celestial bodies are under intense examination as well. In this Letter, a velocity components analysis (VCA) method dedicated to swift analysis of accelerated DM-electron interactions via semiconductor detectors is proposed and the first HPGe detector-based accelerated DM-electron analysis is realized. Utilizing the method, the first germanium based constraint on sub-GeV solar reflected DM-electron interaction is presented with the 205.4 kg·day dataset from the CDEX-10 experiment. In the heavy mediator scenario, our result excels in the mass range of 5-15 keV/c2, achieving a 3 orders of magnitude improvement comparing with previous semiconductor experiments. In the light mediator scenario, the strongest laboratory constraint for DM lighter than 0.1 MeV/c2 is presented. The result proves the feasibility and demonstrates the vast potential of the VCA technique in future accelerated DM-electron analyses with semiconductor detectors. © 2024 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.
Improved limits on solar axions and bosonic dark matter from the CDEX-1B experiment using the profile likelihood ratio method
(American Physical Society, 2020) Y. Wang; Q. Yue; S.K. Liu; K.J. Kang; Y.J. Li; H.P. An; J.P. Chang; J.H. Chen; Y.H. Chen; J.P. Cheng; W.H. Dai; Z. Deng; X.P. Geng; H. Gong; P. Gu; X.Y. Guo; H.T. He; L. He; S.M. He; J.W. Hu; H.X. Huang; T.C. Huang; L.P. Jia; H.B. Li; H. Li; M.X. Li; J.M. Li; J. Li; X. Li; X.Q. Li; Y.L. Li; B. Liao; F.K. Lin; S.T. Lin; Y.D. Liu; Y.Y. Liu; Z.Z. Liu; H. Ma; Q.Y. Nie; J.H. Ning; H. Pan; N.C. Qi; C.K. Qiao; J. Ren; X.C. Ruan; V. Sharma; Z. She; L. Singh; M.K. Singh; T.X. Sun; C.J. Tang; W.Y. Tang; Y. Tian; G.F. Wang; L. Wang; Q. Wang; Z. Wang; H.T. Wong; S.Y. Wu; Y.C. Wu; H.Y. Xing; Y. Xu; T. Xue; Y.L. Yan; L.T. Yang; N. Yi; C.X. Yu; H.J. Yu; J.F. Yue; X.H. Zeng; M. Zeng; Z. Zeng; B.T. Zhang; F.S. Zhang; L. Zhang; Z.Y. Zhang; M.G. Zhao; J.F. Zhou; Z.Y. Zhou; J.J. Zhu
We present the improved constraints on couplings of solar axions and more generic bosonic dark matter particles using 737.1 kg days of data from the CDEX-1B experiment. The CDEX-1B experiment, located at the China Jinping Underground Laboratory, primarily aims at the direct detection of weakly interacting massive particles using a p-type point-contact germanium detector. We adopt the profile likelihood ratio method for analysis of data in the presence of backgrounds. An energy threshold of 160 eV was achieved, much better than the 475 eV of CDEX-1A with an exposure of 335.6 kg days. This significantly improves the sensitivity for the bosonic dark matter below 0.8 keV among germanium detectors. Limits are also placed on the coupling gAe<2.48×10-11 from Compton, bremsstrahlung, atomic-recombination, and deexcitation channels and gANeff×gAe<4.14×10-17 from a Fe57 M1 transition at 90% confidence level. © 2020 authors.
Limits on Light Weakly Interacting Massive Particles from the First 102.8 kg×day Data of the CDEX-10 Experiment
(American Physical Society, 2018) H. Jiang; L.P. Jia; Q. Yue; K.J. Kang; J.P. Cheng; Y.J. Li; H.T. Wong; M. Agartioglu; H.P. An; J.P. Chang; J.H. Chen; Y.H. Chen; Z. Deng; Q. Du; H. Gong; L. He; J.W. Hu; Q.D. Hu; H.X. Huang; H.B. Li; H. Li; J.M. Li; J. Li; X. Li; X.Q. Li; Y.L. Li; B. Liao; F.K. Lin; S.T. Lin; S.K. Liu; Y.D. Liu; Y.Y. Liu; Z.Z. Liu; H. Ma; J.L. Ma; H. Pan; J. Ren; X.C. Ruan; B. Sevda; V. Sharma; M.B. Shen; L. Singh; M.K. Singh; T.X. Sun; C.J. Tang; W.Y. Tang; Y. Tian; G.F. Wang; J.M. Wang; L. Wang; Q. Wang; Y. Wang; S.Y. Wu; Y.C. Wu; H.Y. Xing; Y. Xu; T. Xue; L.T. Yang; S.W. Yang; N. Yi; C.X. Yu; H.J. Yu; J.F. Yue; X.H. Zeng; M. Zeng; Z. Zeng; F.S. Zhang; Y.H. Zhang; M.G. Zhao; J.F. Zhou; Z.Y. Zhou; J.J. Zhu; Z.H. Zhu
We report the first results of a light weakly interacting massive particles (WIMPs) search from the CDEX-10 experiment with a 10 kg germanium detector array immersed in liquid nitrogen at the China Jinping Underground Laboratory with a physics data size of 102.8 kg day. At an analysis threshold of 160 eVee, improved limits of 8×10-42 and 3×10-36 cm2 at a 90% confidence level on spin-independent and spin-dependent WIMP-nucleon cross sections, respectively, at a WIMP mass (mχ) of 5 GeV/c2 are achieved. The lower reach of mχ is extended to 2 GeV/c2. © 2018 authors. Published by the American Physical Society.
Projected WIMP sensitivity of the CDEX-50 dark matter experiment
(Institute of Physics, 2024) X.P. Geng; L.T. Yang; Q. Yue; K.J. Kang; Y.J. Li; H.P. An; C. Greeshma; J.P. Chang; Y.H. Chen; J.P. Cheng; W.H. Dai; Z. Deng; C.H. Fang; H. Gong; Q.J. Guo; T. Guo; X.Y. Guo; L. He; S.M. He; J.W. Hu; H.X. Huang; T.C. Huang; L. Jiang; S. Karmakar; H.B. Li; H.Y. Li; J.M. Li; J. Li; Q.Y. Li; R.M.J. Li; X.Q. Li; Y.L. Li; Y.F. Liang; B. Liao; F.K. Lin; S.T. Lin; J.X. Liu; S.K. Liu; Y.D. Liu; Y. Liu; Y.Y. Liu; H. Ma; Y.C. Mao; Q.Y. Nie; J.H. Ning; H. Pan; N.C. Qi; J. Ren; X.C. Ruan; M.K. Singh; T.X. Sun; C.J. Tang; Y. Tian; G.F. Wang; J.Z. Wang; L. Wang; Q. Wang; Y.F. Wang; Y.X. Wang; H.T. Wong; S.Y. Wu; Y.C. Wu; H.Y. Xing; R. Xu; Y. Xu; T. Xue; Y.L. Yan; N. Yi; C.X. Yu; H.J. Yu; J.F. Yue; M. Zeng; Z. Zeng; B.T. Zhang; F.S. Zhang; L. Zhang; Z.H. Zhang; Z.Y. Zhang; J.Z. Zhao; K.K. Zhao; M.G. Zhao; J.F. Zhou; Z.Y. Zhou; J.J. Zhu
CDEX-50 is a next-generation project of the China Dark Matter Experiment (CDEX) that aims to search for dark matter using a 50-kg germanium detector array. This paper comprises a thorough summary of the CDEX-50 dark matter experiment, including an investigation of potential background sources and the development of a background model. Based on the baseline model, the projected sensitivity of weakly interacting massive particle (WIMP) is also presented. The expected background level within the energy region of interest, set to 2–2.5 keVee, is ∼0.01 counts keVee−1 kg−1 day−1. At 90% confidence level, the expected sensitivity to spin-independent WIMP-nucleon couplings is estimated to reach a cross-section of 5.1 × 10−45 cm2 for a WIMP mass of 5 GeV/c2 with an exposure objective of 150 kg·year and an analysis threshold of 160 eVee. This science goal will correspond to the most sensitive results for WIMPs with a mass of 2.2–8 GeV/c2,. © 2024 IOP Publishing Ltd and Sissa Medialab.
Search for boosted keV-MeV light dark matter particles from evaporating primordial black holes at the CDEX-10 experiment
(American Physical Society, 2023) Z.H. Zhang; L.T. Yang; Q. Yue; K.J. Kang; Y.J. Li; H.P. An; C. Greeshma; J.P. Chang; Y.H. Chen; J.P. Cheng; W.H. Dai; Z. Deng; C.H. Fang; X.P. Geng; H. Gong; Q.J. Guo; X.Y. Guo; L. He; S.M. He; J.W. Hu; H.X. Huang; T.C. Huang; H.T. Jia; X. 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; B. Liao; F.K. Lin; S.T. Lin; J.X. Liu; S.K. Liu; Y.D. Liu; Y. Liu; Y.Y. Liu; Z.Z. Liu; H. Ma; Y.C. Mao; Q.Y. Nie; J.H. Ning; H. Pan; N.C. Qi; J. Ren; X.C. Ruan; Z. She; M.K. Singh; T.X. Sun; C.J. Tang; W.Y. Tang; Y. Tian; G.F. Wang; L. Wang; Q. Wang; Y.F. Wang; Y.X. Wang; H.T. Wong; S.Y. Wu; Y.C. Wu; H.Y. Xing; R. Xu; Y. Xu; T. Xue; Y.L. Yan; N. Yi; C.X. Yu; H.J. Yu; J.F. Yue; M. Zeng; Z. Zeng; B.T. Zhang; F.S. Zhang; L. Zhang; Z.Y. Zhang; K.K. Zhao; M.G. Zhao; J.F. Zhou; Z.Y. Zhou; J.J. Zhu
We present novel constraints on boosted light dark matter particles (denoted as "χ") from evaporating primordial black holes (PBHs) using 205.4 kg·day data from the China Jinping Underground Laboratory's CDEX-10 p-type point contact germanium detector with a 160 eVee analysis threshold. χ from PBHs with masses ranging from 1×1015 g to 7×1016 g are searched in this work. In the presence of PBH abundance compatible with present bounds, our result excludes the χ-nucleon elastic-scattering cross section region from 3.4×10-32 cm2 to 2.3×10-29 cm2 for χ of 1 keV to 24 MeV from PBHs with masses of 5×1015 g, as well as from 1.1×10-28 cm2 to 7.6×10-28 cm2 for χ of 1 keV to 0.6 MeV from PBHs with masses of 7×1016 g. If the χ-nucleon elastic-scattering cross section can be determined in the future, the abundance of PBHs may be severely constrained by χ evaporation. With the lower threshold (160 eVee) of the CDEX-10 experiment compared to the previously used experiments, this work allows for a better reach at soft spectra produced by heavier PBHs, which demonstrates the vast potential of such a technical route to pursue χ from larger PBHs with a low threshold. © 2023 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.
Search for exotic interactions of solar neutrinos in the CDEX-10 experiment
(American Physical Society, 2023) X.P. Geng; L.T. Yang; Q. Yue; K.J. Kang; Y.J. Li; H.P. An; C. Greeshma; J.P. Chang; Y.H. Chen; J.P. Cheng; W.H. Dai; Z. Deng; C.H. Fang; H. Gong; Q.J. Guo; X.Y. Guo; L. He; S.M. He; J.W. Hu; H.X. Huang; T.C. Huang; H.T. Jia; X. 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; B. Liao; F.K. Lin; S.T. Lin; J.X. Liu; S.K. Liu; Y.D. Liu; Y. Liu; Y.Y. Liu; Z.Z. Liu; H. Ma; Y.C. Mao; Q.Y. Nie; J.H. Ning; H. Pan; N.C. Qi; J. Ren; X.C. Ruan; Z. She; M.K. Singh; T.X. Sun; C.J. Tang; W.Y. Tang; Y. Tian; G.F. Wang; L. Wang; Q. Wang; Y.F. Wang; Y.X. Wang; H.T. Wong; S.Y. Wu; Y.C. Wu; H.Y. Xing; R. Xu; Y. Xu; T. Xue; Y.L. Yan; N. Yi; C.X. Yu; H.J. Yu; J.F. Yue; M. Zeng; Z. Zeng; B.T. Zhang; F.S. Zhang; L. Zhang; Z.H. Zhang; Z.Y. Zhang; K.K. Zhao; M.G. Zhao; J.F. Zhou; Z.Y. Zhou; J.J. Zhu; Y.C. Wu
We investigate exotic neutrino interactions using the 205.4-kg·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)B-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 eV/c2 at some benchmark values of Δm412 and g′2sin22θ14. © 2023 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.
Search for Light Weakly-Interacting-Massive-Particle Dark Matter by Annual Modulation Analysis with a Point-Contact Germanium Detector at the China Jinping Underground Laboratory
(American Physical Society, 2019) L.T. Yang; H.B. Li; Q. Yue; H. Ma; K.J. Kang; Y.J. Li; H.T. Wong; M. Agartioglu; H.P. An; J.P. Chang; J.H. Chen; Y.H. Chen; J.P. Cheng; Z. Deng; Q. Du; H. Gong; Q.J. Guo; L. He; J.W. Hu; Q.D. Hu; H.X. Huang; L.P. Jia; H. Jiang; H. Li; J.M. Li; J. Li; X. Li; X.Q. Li; Y.L. Li; B. Liao; F.K. Lin; S.T. Lin; S.K. Liu; Y.D. Liu; Y.Y. Liu; Z.Z. Liu; J.L. Ma; Y.C. Mao; H. Pan; J. Ren; X.C. Ruan; V. Sharma; Z. She; M.B. Shen; L. Singh; M.K. Singh; T.X. Sun; C.J. Tang; W.Y. Tang; Y. Tian; G.F. Wang; J.M. Wang; L. Wang; Q. Wang; Y. Wang; Y.X. Wang; S.Y. Wu; Y.C. Wu; H.Y. Xing; Y. Xu; T. Xue; N. Yi; C.X. Yu; H.J. Yu; J.F. Yue; X.H. Zeng; M. Zeng; Z. Zeng; F.S. Zhang; Y.H. Zhang; M.G. Zhao; J.F. Zhou; Z.Y. Zhou; J.J. Zhu; Z.H. Zhu
We present results on light weakly interacting massive particle (WIMP) searches with annual modulation (AM) analysis on data from a 1-kg mass p-type point-contact germanium detector of the CDEX-1B experiment at the China Jinping Underground Laboratory. Datasets with a total live time of 3.2 yr within a 4.2-yr span are analyzed with analysis threshold of 250 eVee. Limits on WIMP-nucleus (χ-N) spin-independent cross sections as function of WIMP mass (mχ) at 90% confidence level (C.L.) are derived using the dark matter halo model. Within the context of the standard halo model, the 90% C.L. allowed regions implied by the DAMA/LIBRA and CoGeNT AM-based analysis are excluded at >99.99% and 98% C.L., respectively. These results correspond to the best sensitivity at mχ<6 GeV/c2 among WIMP AM measurements to date. © 2019 authors. Published by the American Physical Society.
Search for neutrinoless double-beta decay of Ge 76 with a natural broad energy germanium detector
(American Physical Society, 2022) W.H. Dai; H. Ma; Q. Yue; Z. She; K.J. Kang; Y.J. Li; M. Agartioglu; H.P. An; J.P. Chang; Y.H. Chen; J.P. Cheng; Z. Deng; C.H. Fang; X.P. Geng; H. Gong; Q.J. Guo; X.Y. Guo; L. He; S.M. He; J.W. Hu; H.X. Huang; T.C. Huang; H.T. Jia; X. Jiang; H.B. Li; J.M. Li; J. Li; Q.Y. Li; R.M.J. Li; X.Q. Li; Y.L. Li; Y.F. Liang; B. Liao; F.K. Lin; S.T. Lin; S.K. Liu; Y.D. Liu; Y. Liu; Y.Y. Liu; Z.Z. Liu; Y.C. Mao; Q.Y. Nie; J.H. Ning; H. Pan; N.C. Qi; J. Ren; X.C. Ruan; K. Saraswat; V. Sharma; M.K. Singh; T.X. Sun; C.J. Tang; W.Y. Tang; Y. Tian; G.F. Wang; L. Wang; Q. Wang; Y. Wang; Y.X. Wang; H.T. Wong; S.Y. Wu; Y.C. Wu; H.Y. Xing; R. Xu; Y. Xu; T. Xue; Y.L. Yan; L.T. Yang; C.H. Yeh; N. Yi; C.X. Yu; H.J. Yu; J.F. Yue; M. Zeng; Z. Zeng; B.T. Zhang; F.S. Zhang; L. Zhang; Z.H. Zhang; Z.Y. Zhang; K.K. Zhao; M.G. Zhao; J.F. Zhou; Z.Y. Zhou; J.J. Zhu
A natural broad energy germanium detector is operated in the China Jinping Underground Laboratory for a feasibility study of building the next generation experiment of the neutrinoless double-beta (0νββ) decay of Ge76. The setup of the prototype facility, characteristics of the broad energy germanium detector, background reduction methods, and data analysis are described in this paper. A background index of 6.4×10-3 counts/(keV kg day) is achieved and 1.86 times lower than our previous result of the CDEX-1 detector. No signal is observed with an exposure of 186.4 kg day, thus a limit on the half life of Ge76 0νββ decay is set at T1/20ν>5.62×1022 yr at 90% C.L. The limit corresponds to an effective Majorana neutrino mass in the range of 4.6-10.3 eV, dependent on the nuclear matrix elements. © 2022 American Physical Society.
Studies of the Earth shielding effect to direct dark matter searches at the China Jinping Underground Laboratory
(American Physical Society, 2022) Z.Z. Liu; L.T. Yang; Q. Yue; C.H. Yeh; K.J. Kang; Y.J. Li; M. Agartioglu; H.P. An; J.P. Chang; J.H. Chen; Y.H. Chen; J.P. Cheng; W.H. Dai; Z. Deng; C.H. Fang; X.P. Geng; H. Gong; X.Y. Guo; Q.J. Guo; L. He; S.M. He; J.W. Hu; H.X. Huang; T.C. Huang; H.T. Jia; X. Jiang; H.B. Li; J.M. Li; J. Li; R.M.J. Li; X.Q. Li; Y.L. Li; B. Liao; F.K. Lin; S.T. Lin; S.K. Liu; Y. Liu; Y.D. Liu; Y.Y. Liu; H. Ma; Y.C. Mao; Q.Y. Nie; J.H. Ning; H. Pan; N.C. Qi; J. Ren; X.C. Ruan; V. Sharma; Z. She; K. Saraswat; M.K. Singh; T.X. Sun; C.J. Tang; W.Y. Tang; Y. Tian; G.F. Wang; L. Wang; Q. Wang; Y. Wang; Y.X. Wang; Z. Wang; H.T. Wong; S.Y. Wu; Y.C. Wu; H.Y. Xing; Y. Xu; T. Xue; Y.L. Yan; N. Yi; C.X. Yu; H.J. Yu; J.F. Yue; M. Zeng; Z. Zeng; B.T. Zhang; F.S. Zhang; K.K. Zhang; Z.H. Zhang; Z.Y. Zhang; M.G. Zhao; J.F. Zhou; Z.Y. Zhou; J.J. Zhu
Dark matter direct detection experiments mostly operate at deep underground laboratories. It is necessary to consider shielding effect of the Earth, especially for dark matter particles interacting with a large cross section. We analyzed and simulated the Earth shielding effect for dark matter at the China Jinping Underground Laboratory (CJPL) with a simulation package, CJPL Earth Shielding Simulation code (CJPL_ESS), which is applicable to other underground locations. The further constraints on the χ-N cross section exclusion regions are derived based on the studies with CDEX experiment data. © 2022 authors. Published by the American Physical Society.