Cosmic ray excesses from multi-component dark matter decays
نویسندگان
چکیده
منابع مشابه
Consistent scenarios for cosmic-ray excesses from Sommerfeld- enhanced dark matter annihilation
Anomalies in direct and indirect detection have motivated models of dark matter consisting of a multiplet of nearly-degenerate states, coupled by a new GeV-scale interaction. We perform a careful analysis of the thermal freezeout of dark matter annihilation in such a scenario. We compute the range of “boost factors” arising from Sommerfeld enhancement in the local halo for models which produce ...
متن کاملCosmic-ray Electron and Positron Excesses from Hidden Gaugino Dark Matter
We study a scenario that a hidden gaugino dark matter decays into the standardmodel particles (and their supersymmetric partners) through a kinetic mixing with the gaugino of a U(1)B−L broken at a scale close to the grand unification scale. We show that decay of the hidden gaugino can explain excesses in the cosmic-ray electrons and positrons observed by PAMELA and Fermi.
متن کاملA Brief Review on Dark Matter Annihilation Explanation for e± Excesses in Cosmic Ray
Recently data from PAMELA, ATIC, FERMI-LAT and HESS show that there are e excesses in the cosmic ray energy spectrum. PAMELA observed excesses only in e, but not in anti-proton spectrum. ATIC, FERMI-LAT and HESS observed excesses in e + e spectrum, but the detailed shapes are different which requires future experimental observations to pin down the correct data set. Nevertheless a lot of effort...
متن کاملCosmic Ray Positron and Electron Excess from Hidden-Fermion Dark Matter Decays
The anomalies observed in recent cosmic ray experiments seem to strongly constrain the nature of the dark matter. In this letter, we investigate a possibility of the fermionic dark matter with a minimal extension of the standard model. We found that the dark matter decays caused by the dimension six operators can naturally explain the anomalies.
متن کاملCosmic gamma-ray background from dark matter annihilation
High-energy photons from pair annihilation of dark matter particles contribute to the cosmic gamma-ray background (CGB) observed in a wide energy range. The precise shape of the energy spectrum of CGB depends on the nature of dark matter particles. In order to discriminate between the signals from dark matter annihilation and other astrophysical sources, however, the information from the energy...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Modern Physics Letters A
سال: 2014
ISSN: 0217-7323,1793-6632
DOI: 10.1142/s0217732314400033