Multi-component dark matter

Abstract

We review the multi-component decaying dark matter (DM) scenario to explain the possible cosmic ray excesses in the positron fraction, the positron and electron respective fluxes, and the total e + +e − flux observed by AMS-02. We show that the two-component DM model can fit the AMS-02 datasets. In particular, we demonstrate that the heavier DM component with its mass around 1 TeV dominantly decaying through the e and μ-channels describes the high-energy behavior of the total e + + e − flux data above 500 GeV, while the lighter one of O(100) GeV mainly through the τ -channel explains the substructure around 100 GeV.

The multicomponent dark matter structure and its possible observed manifestations

“…What manifestations and specific effects can be induced by these new particles -it depends on the properties of the model symmetry and interactions. But the second type of scenarios introduces new Dark Matter candidates aiming the explanation of the observed physical phenomena, for example, the positron fraction excess in cosmic-ray spectra (leptophilic models [14,15]) or to interpret photon signals (gamma emission from Galactic center region) as the result of annihilation of DM particles. Certainly, to stabilize new objects the initial SM symmetry should be also modified, for instance, using discrete symmetries.…”

Multicomponent Dark Matter in the Light of CALET and DAMPE

“…In Refs. [43][44][45][46][47], the multicomponent leptophilic decaying DM models [43][44][45][46][47][48] have been proposed to interpret this puzzling situation. In Ref.…”

“…In Refs. [45][46][47], this double-component DM model is also investigated by using the latest AMS-02 e + /e − data release and shown to provide a good fit to the data.…”

“…In this work, we explore the implications of the latest CALET [4,5] and DAMPE [6] data to the e + /e − excesses observed before. Concretely, we would like to apply our single and double-component DM models [43][44][45][46][47] to fit the AMS-02 positron fraction and the CALET or DAMPE total e + + e − flux data. Due to the explicit inconsistency between the CALET and DAMPE data [4], we do not try to combine them.…”

Multicomponent Dark Matter in Radiative Seesaw Models

“…A supersymmetric extension of the radiative seesaw model of Ma [11] is an example [41][42][43][44][45][46]. Other possibilities with multicomponent DM are widely discussed in Ma and Sarkar [34], Kajiyama et al [35,37], Wang and Han [36], Baek et al [38], Aoki et al [39,40], Bhattacharya et al [65], Berezhiani and Khlopov [66,67], Hur et al [68], Zurek [69], Batell [70], Dienes and Thomas [71,72], Ivanov and Keus [73], Dienes et al [74], D'Eramo et al [75], Gu [76], Bhattacharya et al [77,78], Geng et al [79], Boddy et al [80], Geng et al [81], Esch et al [82], Geng et al [83], Arcadi et al [84], DiFranzo and Mohlabeng [85], Aoki and Toma [86], and Aoki et al [87].…”