AMS-02 antiprotons, at last! Secondary astrophysical component and immediate implications for Dark Matter

Giesen, Gaëlle; Boudaud, Mathieu; Génolini, Yoann; Poulin, Vivian; Cirelli, Marco; Salati, Pierre; Serpico, Pasquale Dario

doi:10.1088/1475-7516/2015/09/023

Cited by 207 publications

(258 citation statements)

References 88 publications

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“…The AMS-02 experiment has confirmed previous evidence for a large positron-to-electron ratio in the cosmic rays, but this could be due to a nearby astrophysical source. The same experiment has recently reported a high-statistics measurement of the antiprotonto-proton ratio, which is higher than estimated in previous calculations assuming primary matter cosmic rays [111], but consistent with more recent estimates of the cosmic-ray background [114].…”

Section: Dark Mattersupporting

confidence: 85%

Summary and Outlook: 2015 Lepton-Photon Symposium

Ellis

2016

Proceedings of XXVII International Symposium on Lepton Photon Interactions at High Energies — PoS(LeptonPhoton2015)

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Section: Dark Mattersupporting

confidence: 85%

Summary and Outlook: 2015 Lepton-Photon Symposium

Ellis

2016

Proceedings of XXVII International Symposium on Lepton Photon Interactions at High Energies — PoS(LeptonPhoton2015)

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“…Recently, Ref. [71] performed a detailed analysis of the anti-proton spectrum measured by AMS-02 [72], and also found an indication for an excess component roughly consistent with the parameter space describing a DM interpretation of the GC excess (see also [73] for a less optimistic view). The interpretation of CR anti-matter measurements is complicated by propagation, energy losses, and other modeling uncertainties related to particle fragmentation, as well as the spatial distribution of astrophysical sources.…”

Section: A Indirect Searchesmentioning

confidence: 72%

Dark matter interpretation of the Fermi -LAT observation toward the Galactic Center

et al. 2017

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The center of the Milky Way is predicted to be the brightest region of γ-rays generated by selfannihilating dark matter particles. Excess emission about the Galactic center above predictions made for standard astrophysical processes has been observed in γ-ray data collected by the Fermi Large Area Telescope. It is well described by the square of an NFW dark matter density distribution. Although other interpretations for the excess are plausible, the possibility that it arises from annihilating dark matter is valid. In this paper, we characterize the excess emission as annihilating dark matter in the framework of an effective field theory. We consider the possibility that the annihilation process is mediated by either pseudo-scalar or vector interactions and constrain the coupling strength of these interactions by fitting to the Fermi Large Area Telescope data for energies 1-100 GeV in the 15 • × 15 • region about the Galactic center using self-consistently derived interstellar emission models and point source lists for the region. The excess persists and its spectral characteristics favor a dark matter particle with a mass in the range approximately from 50 to 190 (10 to 90) GeV and annihilation cross section approximately from 1×10 −26 to 4×10 −25 (6×10 −27 to 2×10 −25 ) cm 3 /s for pseudo-scalar (vector) interactions. We map these intervals into the corresponding WIMP-neutron scattering cross sections and find that the allowed range lies well below current and projected direct detection constraints for pseudo-scalar interactions, but are typically ruled out for vector interactions.

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“…Searches for antiprotons have shown to set limits on χχ → W W/ZZ (which are in most of the parameter space the dominant annihilation channels) that are either smaller or comparable to the ones set from γ-rays, depending on astrophysical details of their propagation through the galaxy [33][34][35]. We do not consider these searches in the present study, however, it is certainly interesting to explore to what extend these searches can improve the bounds presented here.…”

Section: Experimental Inputmentioning

confidence: 91%

Singlet-Doublet model: dark matter searches and LHC constraints

Calibbi

Mariotti

Tziveloglou

2015

J. High Energ. Phys.

101

125

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Abstract:The Singlet-Doublet model of dark matter is a minimal extension of the Standard Model with dark matter that is a mixture of a singlet and a non-chiral pair of electroweak doublet fermions. The stability of dark matter is ensured by the typical parity symmetry, and, similar to a 'Bino-Higgsino' system, the extra matter content improves gauge coupling unification. We revisit the experimental constraints on the Singlet-Doublet dark matter model, combining the most relevant bounds from direct (spin independent and spin dependent) and indirect searches. We show that such comprehensive analysis sets strong constraints on a large part of the 4-dimensional parameter space, closing the notorious 'blind-spots' of spin independent direct searches. Our results emphasise the complementarity of direct and indirect searches in probing dark matter models in diverse mass scale regimes. We also discuss the LHC bounds on such scenario, which play a relevant role in the low mass region of the dark matter candidate.

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AMS-02 antiprotons, at last! Secondary astrophysical component and immediate implications for Dark Matter

Cited by 207 publications

References 88 publications

Summary and Outlook: 2015 Lepton-Photon Symposium

Summary and Outlook: 2015 Lepton-Photon Symposium

Dark matter interpretation of the Fermi -LAT observation toward the Galactic Center

Singlet-Doublet model: dark matter searches and LHC constraints

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