scholarly journals Antimatter cosmic rays from dark matter annihilation: First results from an N-body experiment

2008 ◽  
Vol 78 (10) ◽  
Author(s):  
J. Lavalle ◽  
E. Nezri ◽  
E. Athanassoula ◽  
F.-S. Ling ◽  
R. Teyssier
Keyword(s):  
Dark Matter ◽  
Cosmic Rays ◽  
Dark Matter Annihilation ◽  
First Results

Erratum: Cosmic rays from dark matter annihilation and big-bang nucleosynthesis [Phys. Rev. D79, 083522 (2009)]

2009 ◽  
Vol 80 (2) ◽  
Author(s):  
Junji Hisano ◽  
Masahiro Kawasaki ◽  
Kazunori Kohri ◽  
Takeo Moroi ◽  
Kazunori Nakayama
Keyword(s):  
Dark Matter ◽  
Cosmic Rays ◽  
Big Bang ◽  
Big Bang Nucleosynthesis ◽  
Dark Matter Annihilation

scholarly journals Cosmic rays from dark matter annihilation and big-bang nucleosynthesis

2009 ◽  
Vol 79 (8) ◽  
Author(s):  
Junji Hisano ◽  
Masahiro Kawasaki ◽  
Kazunori Kohri ◽  
Takeo Moroi ◽  
Kazunori Nakayama
Keyword(s):  
Dark Matter ◽  
Cosmic Rays ◽  
Big Bang ◽  
Big Bang Nucleosynthesis ◽  
Dark Matter Annihilation

SEARCHING FOR DARK MATTER ANNIHILATION IN Z=-1 COSMIC RAYS WITH AMS

2006 ◽  
Author(s):  
G. RYBKA ◽  
G. P. CAROSI ◽  
P. FISHER ◽  
S. XIAO ◽  
F. ZHOU ◽  
...  
Keyword(s):  
Dark Matter ◽  
Cosmic Rays ◽  
Dark Matter Annihilation

scholarly journals Clumpiness enhancement of charged cosmic rays from dark matter annihilation with Sommerfeld effect

2009 ◽  
Vol 2009 (12) ◽  
pp. 011-011 ◽  
Author(s):  
Qiang Yuan ◽  
Xiao-Jun Bi ◽  
Jia Liu ◽  
Peng-Fei Yin ◽  
Juan Zhang ◽  
...  
Keyword(s):  
Dark Matter ◽  
Cosmic Rays ◽  
Sommerfeld Effect ◽  
Dark Matter Annihilation

scholarly journals A conservative assessment of the current constraints on dark matter annihilation from cosmic rays and CMB observations

2016 ◽  
Vol 26 (06) ◽  
pp. 1750041 ◽  
Author(s):  
Nicolò Masi ◽  
Mario Ballardini
Keyword(s):  
Dark Matter ◽  
Cosmic Rays ◽  
Galactic Halo ◽  
Massive Particle ◽  
Efficiency Factor ◽  
Sommerfeld Effect ◽  
Current Interest ◽  
Lepton Sector ◽  
Dark Matter Annihilation ◽  
Recombination Epoch

In view of the current interest in combining different observations to constraint annihilating weakly interacting massive particle (WIMP) dark matter (DM), we examine the relation between the Sommerfeld effect at the recombination epoch and in the galactic halo. By considering an up-to-date collection of interpolations of cosmic rays (CRs) lepton data (AMS-02 2014, Fermi and PAMELA), as DM annihilation signals, we show that current CRs measurements and recent Planck 2015 constraints from CMB anisotropies almost overlap for DM masses of the order of few TeV, although great theoretical uncertainties afflict CRs and DM descriptions. Combining CRs fits we obtain proper minimal regions allowed by CMB observations, especially for [Formula: see text] and [Formula: see text] annihilation channels, once assumed viable values of the efficiency factor for energy absorption at recombination: the results are consistent with those obtained by the Planck collaboration but allow a slightly larger overlap between CRs constraints from the lepton sector and CMB. Incoming AMS-02 measurements of CRs antiprotons will help to clarify the conundrum.

scholarly journals Cosmic ray transport in mixed magnetic fields and their role on the observed anisotropies

2020 ◽  
Vol 500 (3) ◽  
pp. 3497-3510
Author(s):  
Margot Fitz Axen ◽  
Julia Speicher ◽  
Aimee Hungerford ◽  
Chris L Fryer
Keyword(s):  
Magnetic Field ◽  
Monte Carlo ◽  
Dark Matter ◽  
Cosmic Rays ◽  
Cosmic Ray ◽  
Small Scale ◽  
Dark Matter Annihilation ◽  
Cosmic Ray Flux ◽  
Monte Carlo Transport ◽  
Transport Method

ABSTRACT There is a growing set of observational data demonstrating that cosmic rays exhibit small-scale anisotropies (5°–30°) with amplitude deviations lying between 0.01–0.1 per cent that of the average cosmic ray flux. A broad range of models have been proposed to explain these anisotropies ranging from finite-scale magnetic field structures to dark matter annihilation. The standard diffusion transport methods used in cosmic ray propagation do not capture the transport physics in a medium with finite-scale or coherent magnetic field structures. Here, we present a Monte Carlo transport method, applying it to a series of finite-scale magnetic field structures to determine the requirements of such fields in explaining the observed cosmic ray, small-scale anisotropies.

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