Direct and Indirect Constraints on Isospin-Violating Dark Matter

Zhou, Yu‐Feng

doi:10.1016/j.nuclphysbps.2013.10.072

Cited by 4 publications

(2 citation statements)

References 54 publications

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“…[73,74]. Note that large isospin violating is subject to constraints from the data of cosmic-ray photons [75] and antiprotons [76,77]. The factor F A (q 2 ) is related to the distribution of the nucleon within the nucleus.…”

Section: Jcap03(2015)032mentioning

confidence: 99%

Light mediators in dark matter direct detections

Miao

Zhou

2015

J. Cosmol. Astropart. Phys.

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In an extended effective operator framework, we investigate in detail the effects of light mediators on the event spectra of dark matter (DM)-nucleus scatterings. The presence of light mediators changes the interpretation of the current experimental data, especially the determination of DM particle mass. We show by analytic and numerical illustrations that in general for all the operators relevant to spin-independent scatterings, the DM particle mass allowed by a given set of experimental data increases significantly when the mediator particle becomes lighter. For instance, in the case of CDMS-II-Si experiment, the allowed DM particle mass can reach ∼ 50 (100) GeV at 68% (90%) confidence level, which is much larger than ∼ 10 GeV in the case with contact interactions. The increase of DM particle mass saturates when the mediator mass is below O(10) MeV. The upper limits from other experiments such as SuperCDMS, CDMSlite, CDEX, XENON10/100, LUX, PandaX etc. all tend to be weaker toward high DM mass regions. In a combined analysis, we show that the presence of light mediators can partially relax the tension in the current results of CDMS-II-Si, SuperCDMS and LUX. *

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Section: Jcap03(2015)032mentioning

confidence: 99%

Light mediators in dark matter direct detections

Miao

Zhou

2015

J. Cosmol. Astropart. Phys.

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“…Still, it is not difficult to envision even more generic frameworks where some of our assumptions do not hold. For isospin-violating dark matter [106][107][108][109], for example, the dark matter coupling to the proton and the neutron are different, so that σ p no longer suffices to characterize the dark matter-nucleon interactions. In that case, the signal regions will shift for both, direct JCAP12(2017)012 detection experiments and the neutrino flux from the Sun, as recently emphasized in [110].…”

Section: Discussionmentioning

confidence: 99%

On the role of neutrinos telescopes in the search for Dark Matter annihilations in the Sun

Fornengo

Masiero

Queiroz

et al. 2017

J. Cosmol. Astropart. Phys.

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The observation of GeV neutrinos coming from the Sun would be an unmistakable signal of dark matter. Current neutrino detectors have so far failed to detect such a signal, however, and bounds from direct and indirect dark matter searches may significantly restrict the possibility of observing it in future experiments such as Hyper-Kamiokande or IceCube-Gen2. In this work we assess, in the light of current data and of expected experimental sensitivities, the prospects for the detection of a neutrino signal from dark matter annihilations in the Sun. To be as general as possible, equilibrium between the capture and the annihilation rates in the Sun is not assumed in our analysis; instead, the dark matter scattering and annihilation cross sections are taken as free and independent parameters. We consider capture via both spin-dependent and spin-independent interactions, and annihilations into three representative final states: bb, W + W − , and τ + τ − . We find that when the capture in the Sun is dominated by spin-independent interactions, current direct detection bounds already preclude the observation of a neutrino signal in future experiments. For capture via spin-dependent interactions, a strong complementarity is observed, over most of the parameter space, between future neutrino detectors and planned direct and indirect dark matter detection experiments, such as PICO-500 and CTA. In this case, we also identify some regions of the parameter space that can be probed, via the neutrino flux from the Sun, only by future neutrino experiments.

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Exothermic isospin-violating dark matter after SuperCDMS and CDEX

et al. 2015

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We show that exothermic isospin-violating dark matter (IVDM) can make the results of the latest CDMS-Si experiment consistent with recent null experiments, such as XENON10, XENON100, LUX, CDEX, and SuperCDMS, whereas for the CoGeNT experiment, a strong tension still persists. For CDMS-Si, separate exothermic dark matter or isospin-violating dark matter cannot fully ameliorate the tensions among these experiments; the tension disappears only if exothermic scattering is combined with an isospin-violating effect of f_n/f_p=-0.7. For such exothermic IVDM to exist, at least a new vector gauge boson (dark photon or dark Z') that connects SM quarks to Majorana-type DM particles is required.Comment: 12 pages, 6 figure

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Direct and Indirect Constraints on Isospin-Violating Dark Matter

Cited by 4 publications

References 54 publications

Light mediators in dark matter direct detections

Light mediators in dark matter direct detections

On the role of neutrinos telescopes in the search for Dark Matter annihilations in the Sun

Exothermic isospin-violating dark matter after SuperCDMS and CDEX

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