PandaX-II constraints on spin-dependent WIMP-nucleon effective interactions

Xia, Jingkai; Abdukerim, Abdusalam; Chen, Wei; Chen, Xun; Chen, Yunhua; Cui, X. F.; Fang, Deqing; Fu, Changbo; Giboni, Karl; Giuliani, F.; Gu, Linhui; Guo, Xuyuan; Guo, Z.; Han, K.; He, Changda; He, Shengming; Huang, Di; Huang, X. T.; Huang, Zhongqiang; Ji, Peng; Ji, Xiangdong; Ju, Yonglin; Li, Shaoli; Lin, Huibin; Liu, Huaxuan; Liu, Jianglai; Ma, Yugang; Mao, Y.; Ni, K.; Ning, Jinhua; Ren, Xiangxiang; Shi, Fang; Tan, Andi; Wang, Andrew; Wang, Cheng; Wang, Hongwei; Wang, Meng; Wang, Qiuhong; Wang, Siguang; Wang, Xiuli; Wang, Xüming; Wang, Zhou; Wu, M.; Wu, Shiyong; Xiao, M.; Xie, Pengwei; Yan, Binbin; Yang, Jijun; Yang, Y.; Yu, C. X.; Yuan, Jumin; Yue, Jianfeng; Zhang, Dan; Zhang, Honggang; Zhang, Tao; Zhao, Li; Zheng, Qibin; Zhou, Jifang; Zhou, N.; Zhou, Xiaopeng; Haxton, W. C.

doi:10.1016/j.physletb.2019.02.043

Cited by 85 publications

(75 citation statements)

References 39 publications

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“…On the one hand, a non-relativistic effective field theory (NREFT) [33][34][35] based on the lowest-order operators that can describe the coupling of a WIMP to a nucleon. The NREFT approach proposes a set of one-body operators, considered in recent experimental analyses [36][37][38][39]. On the other hand, an organization based on chiral effective field theory (ChEFT) [40][41][42], a low-energy effective theory of quantum chromodynamics (QCD) that preserves the QCD symmetries, in particular capturing the important role played by pions at low energies.…”

Section: Introductionmentioning

confidence: 99%

Nuclear structure factors for general spin-independent WIMP-nucleus scattering

et al. 2019

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We present nuclear structure factors that describe the generalized spin-independent coupling of weakly interacting massive particles (WIMPs) to nuclei. Our results are based on state-of-the-art nuclear structure calculations using the large-scale nuclear shell model. Starting from quark-and gluon-level operators, we consider all possible coherently enhanced couplings of spin-1/2 and spin-0 WIMPs to one and two nucleons up to third order in chiral effective field theory. This includes a comprehensive discussion of the structure factors corresponding to the leading two-nucleon currents covering, for the first time, the contribution of spin-2 operators. We provide results for the most relevant nuclear targets considered in present and planned dark matter direct detection experiments: fluorine, silicon, argon, and germanium, complementing our previous work on xenon. All results are also publicly available in a Python

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Section: Introductionmentioning

confidence: 99%

Nuclear structure factors for general spin-independent WIMP-nucleus scattering

et al. 2019

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“…Dual-phase xenon time projection chambers (TPCs) have demonstrated exceptionally high sensitivities to various dark matter candidates, including both weakly interacting massive particles (WIMPs) [1][2][3] and leptophilic dark matter [4,5]. They also offer a promising, scalable method for measurement of coherent scattering of reactor antineutrinos [6].…”

Section: Introductionmentioning

confidence: 99%

Electron extraction efficiency study for dual-phase xenon dark matter experiments

Pereverzev

Lenardo

et al. 2019

Phys. Rev. D

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Dual-phase xenon detectors are widely used in dark matter direct detection experiments, and have demonstrated the highest sensitivities to a variety of dark matter interactions. However, a key component of the dual-phase detector technology-the efficiency of charge extraction from liquid xenon into gas-has not been well characterized. In this paper, we report a new measurement of the electron extraction efficiency (EEE) in a small xenon detector using two mono-energetic decay features of 37 Ar. By achieving stable operation at very high voltages, we measured the EEE values at the highest extraction electric field strength reported to date. For the first time, an apparent saturation of the EEE is observed over a large range of electric field; between 7.5 kV/cm and 10.4 kV/cm extraction field in the liquid xenon the EEE stays stable at the level of 1%(kV/cm) −1 . In the context of electron transport models developed for xenon, we discuss how the observed saturation may help calibrate this relative EEE measurement to the absolute EEE values. In addition, we present the implications of this result not only to current and future xenon-based dark matter searches, but also to xenon-based searches for coherent elastic neutrino-nucleus scatters.

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“…[90] is used to compute several flavor variables, the muon anomalous magnetic moment, the dark matter relic density 2 (Ω DM h 2 ), the present-day velocityweighted annihilation cross section ( σv ) and the spin-dependent and spin-independent WIMP-nucleon scattering cross sections (σ SD and σ SI ). The constraints on the WIMPnucleon scattering cross sections stemming from various dark matter direct detection (DMDD) experiments are computed using DDCalc 2.0.0 [92] where the 2018 and 2019 results from XENON1T [93,94], the 2017 and 2019 limits from PICO [95][96][97] and the 2018 limits from PandaX [98,99] are implemented. For DM indirect detection we only consider the limit on σv stemming from the observation of gamma rays originating from dwarf galaxies, which we implement as a hard cut on each of the channels reported on the last page of Ref.…”

Section: Analysis Setupmentioning

confidence: 99%

The current status of fine-tuning in supersymmetry

Beekveld

Caron

Austri

2020

J. High Energ. Phys.

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In this paper, we minimize and compare two different fine-tuning measures in four high-scale supersymmetric models that are embedded in the MSSM. In addition, we determine the impact of current and future dark matter direct detection and collider experiments on the fine-tuning. We then compare the low-scale electroweak measure with the high-scale Barbieri-Giudice measure, which generally do not agree. However, we find that they do reduce to the same value when the higgsino parameter drives the degree of finetuning. Depending on the high-scale model and fine-tuning definition, we find a minimal fine-tuning of 3 − 38 (corresponding to O(10 − 1)%) for the low-scale measure, and 63 − 571 (corresponding to O(1 − 0.1)%) for the high-scale measure. In addition, minimally finetuned spectra give rise to a dark matter relic density that is between 10 −3 < Ωh 2 < 1, when µ determines the minimum of the fine-tuning. We stress that it is too early to conclude on the fate of supersymmetry, based only on the fine-tuning paradigm.

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PandaX-II constraints on spin-dependent WIMP-nucleon effective interactions

Cited by 85 publications

References 39 publications

Nuclear structure factors for general spin-independent WIMP-nucleus scattering

Nuclear structure factors for general spin-independent WIMP-nucleus scattering

Electron extraction efficiency study for dual-phase xenon dark matter experiments

The current status of fine-tuning in supersymmetry

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