Results of dark matter search using the full PandaX-II exposure *

Wang, Qiuhong; Abdukerim, Abdusalam; Chen, Wei; Chen, Xun; Chen, Yunhua; Cheng, C. H.; Cui, X. F.; Yang, Fan; Fang, Deqing; Fu, Changbo; Fu, Mengting; Geng, Li-Sheng; Giboni, Karl; Gu, Linhui; Guo, Xuyuan; Han, K.; He, Changda; Huang, Di; Huang, Yan; Huang, Yanlin; Huang, Zhongqiang; Ji, Xiangdong; Ju, Yonglin; Li, Shuaijie; Liu, Huaxuan; Liu, Jianglai; Ma, Wenbo; Ma, Yugang; Mao, Y.; Meng, Y.; Ni, K.; Ning, Jinhua; Ning, Xuyang; Ren, Xiangxiang; Shang, Changsong; Si, Lin; Shen, Guangqiu; Tan, Andi; Wang, Andrew; Wang, Hongwei; Wang, Meng; Wang, Siguang; Wang, Jiaqiang; Wang, Xiuli; Wang, Zhou; Wu, M.; Wu, Shiyong; Wu, Weihao; Xia, Jingkai; Xiao, M.; Xie, Pengwei; Yan, Binbin; Yang, Jijun; Yang, Y.; Yu, C. X.; Yuan, Jumin; Yuan, Ying; Zeng, Xiaoqin; Zhang, Dan; Zhang, Tao; Zhao, Li; Zheng, Qibin; Zhou, Jifang; Zhou, N.; Zhou, Xiaopeng

doi:10.1088/1674-1137/abb658

Cited by 128 publications

(168 citation statements)

References 35 publications

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“…One distinctive feature of the candidates is that the spin-independent (SI) cross-section of their scattering with nucleons is approximately 10 −45 cm 2 since they are usually supposed to couple to the Standard Model (SM) particles through weak interactions [5]. Nevertheless, the DM direct detection experiments give a different answer; that is, so far, the XENON-1T and PandaX-II experiments have restricted the cross-section below the order of 10 −46 cm 2 [6][7][8], which implies that the interaction between DM and nucleons is at most feeble [9]. This fact reveals a general conclusion that simple WIMP theories face significant experimental challenges.…”

Section: Introductionmentioning

confidence: 99%

Singlino-dominated dark matter in general NMSSM

Cao

Lian

et al. 2021

J. High Energ. Phys.

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The general Next-to-Minimal Supersymmetric Standard Model (NMSSM) describes the singlino-dominated dark-matter (DM) property by four independent parameters: singlet-doublet Higgs coupling coefficient λ, Higgsino mass μtot, DM mass $$ {m}_{{\tilde{\chi}}_1^0} $$ m χ ˜ 1 0 , and singlet Higgs self-coupling coefficient κ. The first three parameters strongly influence the DM-nucleon scattering rate, while κ usually affects the scattering only slightly. This characteristic implies that singlet-dominated particles may form a secluded DM sector. Under such a theoretical structure, the DM achieves the correct abundance by annihilating into a pair of singlet-dominated Higgs bosons by adjusting κ’s value. Its scattering with nucleons is suppressed when λv/μtot is small. This speculation is verified by sophisticated scanning of the theory’s parameter space with various experiment constraints considered. In addition, the Bayesian evidence of the general NMSSM and that of Z3-NMSSM is computed. It is found that, at the cost of introducing one additional parameter, the former is approximately 3.3 × 103 times the latter. This result corresponds to Jeffrey’s scale of 8.05 and implies that the considered experiments strongly prefer the general NMSSM to the Z3-NMSSM.

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Section: Introductionmentioning

confidence: 99%

Singlino-dominated dark matter in general NMSSM

Cao

Lian

et al. 2021

J. High Energ. Phys.

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“…Among the most sensitive probes of the WIMP DM paradigm are direct detection experiments [5][6][7][8][9], where one searches for interactions of DM with atomic nuclei. Over the past few decades, direct detection experiments have made impressive progress: liquid noble gas detectors have reached O(tonne-yr) exposures with nuclear recoil energy thresholds as small as a few keV [10][11][12][13], while cryogenic bolometric detectors have pushed the nuclear recoil energy threshold below 100 eV, albeit as of yet only with detectors accumulating O(kg days) of exposure [14][15][16][17][18]. A large experimental program is underway to extend the sensitivity of direct detection experiments both to lower WIMP masses and smaller WIMP-nucleon cross sections [19][20][21][22][23], as well as to develop directional detectors [24][25][26][27][28][29][30][31][32][33][34].…”

Section: Introductionmentioning

confidence: 99%

New Projections for Dark Matter Searches with Paleo-Detectors

et al. 2021

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Paleo-detectors are a proposed experimental technique to search for dark matter (DM). In lieu of the conventional approach of operating a tonne-scale real-time detector to search for DM-induced nuclear recoils, paleo-detectors take advantage of small samples of naturally occurring rocks on Earth that have been deep underground (≳5 km), accumulating nuclear damage tracks from recoiling nuclei for O(1)Gyr. Modern microscopy techniques promise the capability to read out nuclear damage tracks with nanometer resolution in macroscopic samples. Thanks to their O(1)Gyr integration times, paleo-detectors could constitute nuclear recoil detectors with keV recoil energy thresholds and 100 kilotonne-yr exposures. This combination would allow paleo-detectors to probe DM-nucleon cross sections orders of magnitude below existing upper limits from conventional direct detection experiments. In this article, we use improved background modeling and a new spectral analysis technique to update the sensitivity forecast for paleo-detectors. We demonstrate the robustness of the sensitivity forecast to the (lack of) ancillary measurements of the age of the samples and the parameters controlling the backgrounds, systematic mismodeling of the spectral shape of the backgrounds, and the radiopurity of the mineral samples. Specifically, we demonstrate that even if the uranium concentration in paleo-detector samples is 10−8 (per weight), many orders of magnitude larger than what we expect in the most radiopure samples obtained from ultra basic rock or marine evaporite deposits, paleo-detectors could still probe DM-nucleon cross sections below current limits. For DM masses ≲ 10 GeV/c2, the sensitivity of paleo-detectors could still reach down all the way to the conventional neutrino floor in a Xe-based direct detection experiment.

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Section: Introductionmentioning

confidence: 99%

“…The present direct and indirect search of Dark Matter(DM) have so far given a lot of constraints on the DM interaction [1][2][3][4][5][6][7][8] . In particular, the direct detection experiments [1][2][3] have pushed the DM-nucleus interaction cross section to be less than around 10 −46 cm 2 for GeV-TeV scale DM particles. These direct detection measurements have raised serious concerns that the GeV-TeV scale DM should have interactions much weaker than we thought, such that for the DM candidate of weakly interacting massive particle, an over-production of the relic density in thermal production mechanism seems hard to avoid.…”

Section: Introductionmentioning

confidence: 99%

Light dark matter from dark sector decay

Cheng

Liao

2021

Physics Letters B

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We explore the possibility that the dark matter relic density is not produced by thermal mechanism directly, but by the decay of other heavier dark sector particles which on the other hand can be produced by the thermal freeze-out mechanism. Using a concrete model with a light dark matter from dark sector decay, we study the collider signature of the dark sector particles in association with Higgs production processes. We find that the future lepton colliders can be a better place to probe the signature of this kind of light dark matter model than the hadron collider such as LHC. Meanwhile, it is found that a Higgs factory with center of mass energy 250 GeV has a better potential to resolve the signature of this kind of light dark matter model than the Higgs factory with center of mass energy 350 GeV.

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Results of dark matter search using the full PandaX-II exposure *

Cited by 128 publications

References 35 publications

Singlino-dominated dark matter in general NMSSM

Singlino-dominated dark matter in general NMSSM

New Projections for Dark Matter Searches with Paleo-Detectors

Light dark matter from dark sector decay

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