Secluded dark matter in light of the Cherenkov Telescope Array (CTA)

Siqueira, Clarissa

doi:10.1016/j.physletb.2019.134840

Cited by 6 publications

(3 citation statements)

References 82 publications

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“…As already stressed in the introduction, CTA provides unique opportunities to test the WIMP paradigm at the TeV scale. Heavy DM candidates falling into this mass range include the (still) most popular lightest neutralino [3], but also candidates appearing in models with extra dimensions [55,56], or models involving 'portals' between the standard model and a dark sector [57][58][59][60], just to name a few. The spectral distribution of the expected gamma rays contains valuable information about the underlying theory.…”

Section: Dark Matter Contributionmentioning

confidence: 99%

Sensitivity of the Cherenkov Telescope Array to a dark matter signal from the Galactic centre

Acharyya

Adam

Adams

et al. 2021

J. Cosmol. Astropart. Phys.

116

149

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A deep survey of the Large Magellanic Cloud at ∼ 0.1−100 TeV photon energies with the Cherenkov Telescope Array is planned. We assess the detection prospects based on a model for the emission of the galaxy, comprising the four known TeV emitters, mock populations of sources, and interstellar emission on galactic scales. We also assess the detectability of 30 Doradus and SN 1987A, and the constraints that can be derived on the nature of dark matter. The survey will allow for fine spectral studies of N 157B, N 132D, LMC P3, and 30 Doradus C, and half a dozen other sources should be revealed, mainly pulsar-powered objects. The remnant from SN 1987A could be detected if it produces cosmic-ray nuclei with a flat power-law spectrum at high energies, or with a steeper index 2.3 − 2.4 pending a flux increase by a factor > 3 − 4 over ∼ 2015 − 2035. Large-scale interstellar emission remains mostly out of reach of the survey if its > 10 GeV spectrum has a soft photon index ∼ 2.7, but degree-scale 0.1 − 10 TeV pion-decay emission could be detected if the cosmic-ray spectrum hardens above >100 GeV. The 30 Doradus star-forming region is detectable if acceleration efficiency is on the order of 1 − 10% of the mechanical luminosity and diffusion is suppressed by two orders of magnitude within < 100 pc. Finally, the survey could probe the canonical velocity-averaged cross section for self-annihilation of weakly interacting massive particles for cuspy Navarro-Frenk-White profiles.

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Section: Dark Matter Contributionmentioning

confidence: 99%

Sensitivity of the Cherenkov Telescope Array to a dark matter signal from the Galactic centre

Acharyya

Adam

Adams

et al. 2021

J. Cosmol. Astropart. Phys.

116

149

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“…In this paper, we will investigate a scenario that goes beyond the usual WIMP scenario by assuming that our DM particles χ do not annihilate directly into SM particles, but instead into long-lived mediators Y that subsequently decay into SM particles, see figure 1 for an illustration. We typically get this phenomenology in secluded DM models [23][24][25][26][27][28][29]. This scenario has been studied in more general scenarios for the Sun in refs.…”

mentioning

confidence: 99%

Neutrinos and gamma rays from long-lived mediator decays in the Sun

Niblaeus

Beniwal

Edsjö

2019

J. Cosmol. Astropart. Phys.

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We investigate a scenario where dark matter (DM) particles can be captured and accumulate in the Sun, and subsequently annihilate into a pair of long-lived mediators. These mediators can decay further out in the Sun or outside of the Sun. Compared to the standard scenario where DM particles annihilate directly into Standard Model particles close to the solar core, here we also obtain fluxes of gamma rays and charged cosmic rays. We simulate this scenario using a full three-dimensional model of the Sun, and include interactions and neutrino oscillations. In particular, we perform a model-independent study of the complementarity between neutrino and gamma ray fluxes by comparing the recent searches from IceCube, Super-Kamiokande, Fermi-LAT, ARGO and HAWC.We find that the resulting neutrino fluxes are significantly higher at high energy when the mediators decay further out in the Sun. We also find that gamma ray searches place stronger constraints than neutrino searches on these models even in cases where the mediators decay mainly inside the Sun, except in the approximately inner 10% of the Sun where neutrino searches are more powerful. We present our results in a model-independent manner and release a new version of the WimpSim code that can be used to simulate this scenario for arbitrary mediator models.

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“…In colliders and by direct methods, DM searches have profoundly probed several WIMP model bounds and therefore, stricter limits are being imposed for the cross sections considered in these experiments. 26 New theoretical developments have to work around these constraints and one such scenario is the Secluded DM model. The particles can be divided into three sectors (as depicted in Figure 11), the WIMP particle, the SM particle and the particle that acts as the mediator (henceforth known as V) between the first two.…”

Section: Secluded Dark Matter and Spectramentioning

confidence: 99%

Sensitivity of present and future gamma-ray telescopes to dark matter self-annihilation signals in the Galactic Center

Fortes¹

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Secluded dark matter in light of the Cherenkov Telescope Array (CTA)

Cited by 6 publications

References 82 publications

Sensitivity of the Cherenkov Telescope Array to a dark matter signal from the Galactic centre

Sensitivity of the Cherenkov Telescope Array to a dark matter signal from the Galactic centre

Neutrinos and gamma rays from long-lived mediator decays in the Sun

Sensitivity of present and future gamma-ray telescopes to dark matter self-annihilation signals in the Galactic Center

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