| 1. |
- Albuquerque, Ivone F. M., et al.
(författare)
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Closing the window on strongly interacting dark matter with IceCube
- 2010
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Ingår i: Physical Review D. - 1550-7998 .- 1550-2368. ; 81:6, s. 063510-
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Tidskriftsartikel (refereegranskat)abstract
- We use the recent results on dark matter searches of the 22-string IceCube detector to probe the remaining allowed window for strongly interacting dark matter in the mass range 10(4) < m(X) < 10(15) GeV. We calculate the expected signal in the 22-string IceCube detector from the annihilation of such particles captured in the Sun and compare it to the detected background. As a result, the remaining allowed region in the mass versus cross section parameter space is ruled out. We also show the expected sensitivity of the complete IceCube detector with 86 strings.
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| 2. |
- Albuquerque, Ivone F. M., et al.
(författare)
-
Constraints on enhanced dark matter annihilation from IceCube results
- 2012
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Ingår i: Physical Review D. - 1550-7998 .- 1550-2368. ; 85:12, s. 123539-
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Tidskriftsartikel (refereegranskat)abstract
- Excesses on positron and electron fluxes-measured by ATIC and the PAMELA and Fermi-LAT telescopes-can be explained by dark matter annihilation in the Galaxy, however, it requires large boosts on the dark matter annihilation rate. There are many possible enhancement mechanisms such as the Sommerfeld effect or the existence of dark matter clumps in our halo. If enhancements on the dark matter annihilation cross section are taking place, the dark matter annihilation in the core of the Earth will be enhanced. Here we use recent results from the IceCube 40-string configuration to probe generic enhancement scenarios. We present results as a function of the dark matter-proton interaction cross section, sigma(chi p) weighted by the branching fraction into neutrinos f(nu(nu) over bar) as a function of a generic boost factor B-F, which parametrizes the expected enhancement of the annihilation rate. We find that dark matter models that require annihilation enhancements of O(100) or more and that annihilate significantly into neutrinos are excluded as an explanation for these excesses. We also determine the boost range that can be probed by the full IceCube telescope.
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| 3. |
- Albuquerque, Ivone F. M., et al.
(författare)
-
Constraints on self interacting dark matter from IceCube results
- 2014
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Ingår i: Journal of Cosmology and Astroparticle Physics. - : IOP Publishing. - 1475-7516. ; :2, s. 047-
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Tidskriftsartikel (refereegranskat)abstract
- If dark matter particles self-interact, their capture by astrophysical objects should be enhanced. As a consequence, the rate by which they annihilate at the center of the object will increase. If their self scattering is strong, it can be observed indirectly through an enhancement of the flux of their annihilation products. Here we investigate the effect of self-interaction on the neutrino flux produced by annihilating dark matter in the center of the Sun. We consider annihilation into two channels: W+W- (or tau(+)tau(-) for a dark matter mass below the W mass) and b (b) over bar. We estimate the event rate in the IceCube detector, using its 79-string configuration, and compare our prediction to their experimental results, hence probing dark matter self interacting models.
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