Dark matter search results from first data from the PandaX-II experiment

Yang, Y.

doi:10.22323/1.282.0224

Cited by 5 publications

(6 citation statements)

References 16 publications

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“…(33,37). This is just below the current limit of 1.8 × 10 −45 cm 2 on protons for 70 GeV DM from the PandaX-II experiment [71], and well above the expected reach of LZ experiment, 1×10 −47 cm 2 for DM coupling to protons.…”

Section: Direct Detectionmentioning

confidence: 56%

Hidden sector explanation of B -decay and cosmic-ray anomalies

et al. 2017

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There are presently several discrepancies in b → s + − decays of B mesons suggesting new physics coupling to b quarks and leptons. We show that a Z , with couplings to quarks and muons that can explain the B-decay anomalies, can also couple to dark matter in a way that is consistent with its relic abundance, direct detection limits, and hints of indirect detection. The latter include possible excess events in antiproton spectra recently observed by the AMS-02 experiment. We present two models, having a heavy (light) Z with m Z ∼ 600 (12) GeV and fermionic dark matter with mass mχ ∼ 50 (2000) GeV, producing excess antiprotons with energies of ∼ 10 (300) GeV. The first model is also compatible with fits for the galactic center GeV gamma-ray excess. arXiv:1702.00395v3 [hep-ph] 28 Apr 2017 [1] R. Aaij et al. [LHCb Collaboration], "Test of lepton universality using B + → K + + − decays," Phys. Rev. Lett. 113 (2014) 151601 [arXiv:1406.6482 [hep-ex]].

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Section: Direct Detectionmentioning

confidence: 56%

Hidden sector explanation of B -decay and cosmic-ray anomalies

et al. 2017

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“…The observed 90% C.L. upper limits from PandaX-II(2017) [53], XENON1T(2017) [54], LUX (2017) [55] and the projected LUX-ZEPLIN's sensitivity are plotted [56].…”

Section: Resultsmentioning

confidence: 99%

Vacuum stability in stau-neutralino coannihilation in MSSM

Duan

Han

et al. 2019

Physics Letters B

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The stau-neutralino coannihilation provides a feasible way to accommodate the observed cosmological dark matter (DM) relic density in the minimal supersymmetric standard model (MSSM). In such a coannihilation mechanism the stau mass usually has an upper bound since its annihilation rate becomes small with the increase of DM mass. Inspired by this observation, we examine the upper limit of stau mass in the parameter space with a large mixing of staus. We find that the stau pair may dominantly annihilate into dibosons and hence the upper bound on the stau mass (∼ 400 GeV) obtained from the ff final states can be relaxed. Imposing the DM relic density constraint and requiring a long lifetime of the present vacuum, we find that the lighter stau mass can be as heavy as about 1.4 TeV for the stau maximum mixing. However, if requiring the present vacuum to survive during the thermal history of the universe, this mass limit will reduce to about 0.9 TeV. We also discuss the complementarity of vacuum stability and direct detections in probing this stau coannihilation scenario.

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“…The DAMA/NaI [8] Collaboration indeed reported the observation of an annually modulating rate consistent with DM scattering. However, their results seem to be inconsistent with the results obtained from subsequent experiments like CoGeNT [9], XENON100 [10], PandaX-II [11,12] and LUX [13]. These and other experiments have tested and ruled out an impressive range of particle DM models by imposing bounds in the plane described by the DM particle mass and its coupling to nucleons.…”

Section: Introductionmentioning

confidence: 84%

ILC sensitivity for leptophilic scalar dark matter

Rawat

2024

J. Phys. G: Nucl. Part. Phys.

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We explore the viability of detecting a leptophilic scalar dark matter at the ILC in a simplified model approach. We present the constraints on the couplings of scalar dark matter with the standard model fermions ensuing from the relic density bounds deduced from the 2018 Planck data. We, then, present the reach of the ILC in terms of $\Lambda$, the scale of the effective theory, by performing a detailed analysis for the $Z$ associated DM pair production (i.e., $ e^+ e^- \rightarrow 2 $ jets + $\not \!\! E_T$, $ e^+ e^- \rightarrow \mu^+ \mu^-$ + $\not \!\! E_T$ and $ e^+ e^- \rightarrow e^+ e^-$ + $\not \!\! E_T$). We present the results for various run scenarios as 3-$\sigma$ contours in the $m_{\phi}-\Lambda$ plane. We also analyze the effect of beam polarization on the sensitivity of this search. We find that for the process with two hadronic jets in the final state, ILC can probe $\Lambda$ up to 1.76 TeV for $\sqrt{s}= 1$ TeV that can further enhance to 1.99 TeV, after the inclusion of polarization effects.

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Dark matter search results from first data from the PandaX-II experiment

Cited by 5 publications

References 16 publications

Hidden sector explanation of B -decay and cosmic-ray anomalies

Hidden sector explanation of B -decay and cosmic-ray anomalies

Vacuum stability in stau-neutralino coannihilation in MSSM

ILC sensitivity for leptophilic scalar dark matter

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