scholarly journals Virtual Internal Bremsstrahlung of Dark Matter and Connection with AMS-02 Result

2015 ◽  
Vol 61 ◽  
pp. 188-192
Author(s):  
Takashi Toma
Keyword(s):  
Dark Matter ◽  
Internal Bremsstrahlung

scholarly journals Spin-one dark matter and gamma ray signals from the galactic center

2020 ◽  
Vol 2020 (8) ◽  
Author(s):  
H. Hernández-Arellano ◽  
M. Napsuciale ◽  
S. Rodríguez
Keyword(s):  
Dark Matter ◽  
Cross Section ◽  
Gamma Ray ◽  
Galactic Center ◽  
Photon Emission ◽  
Scalar Coupling ◽  
Initial State ◽  
Internal Bremsstrahlung ◽  
Resonance Effects ◽  
State Radiation

Abstract In this work we study the possibility that the gamma ray excess (GRE) at the Milky Way galactic center come from the annihilation of dark matter with a (1, 0) ⊕ (0, 1) space-time structure (spin-one dark matter, SODM). We calculate the production of prompt photons from initial state radiation, internal bremsstrahlung, final state radiation including the emission from the decay products of the μ, τ or hadronization of quarks. Next we study the delayed photon emission from the inverse Compton scattering (ICS) of electrons (produced directly or in the prompt decay of μ, τ leptons or in the hadronization of quarks produced in the annihilation of SODM) with the cosmic microwave background or starlight. All these mechanisms yield significant contributions only for Higgs resonant exchange, i.e. for M ≈ MH /2, and the results depend on the Higgs scalar coupling to SODM, gs. The dominant mechanism at the GRE bump is the prompt photon production in the hadronization of b quarks produced in $$ \overline{D}D\to \overline{b}b $$ D ¯ D → b ¯ b , whereas the delayed photon emission from the ICS of electrons coming from the hadronization of b quarks produced in the same reaction dominates at low energies (ω < 0.3 GeV ) and prompt photons from c and τ , as well as from internal bremsstrahlung, yield competitive contributions at the end point of the spectrum (ω ≥ 30 GeV ). Taking into account all these contributions, our results for photons produced in the annihilation of SODM are in good agreement with the GRE data for gs ∈ [0.98, 1.01] × 10−3 and M ∈ [62.470, 62.505] GeV . We study the consistency of the corresponding results for the dark matter relic density, the spin-independent dark matter-nucleon cross-section σp and the cross section for the annihilation of dark matter into $$ \overline{b}b $$ b ¯ b , τ+τ−, μ+μ− and γγ, taking into account the Higgs resonance effects, finding consistent results in all cases.

scholarly journals Fermi LAT search for internal bremsstrahlung signatures from dark matter annihilation

2012 ◽  
Vol 2012 (07) ◽  
pp. 054-054 ◽  
Author(s):  
Torsten Bringmann ◽  
Xiaoyuan Huang ◽  
Alejandro Ibarra ◽  
Stefan Vogl ◽  
Christoph Weniger
Keyword(s):  
Dark Matter ◽  
Dark Matter Annihilation ◽  
Internal Bremsstrahlung

scholarly journals Scalar dark matter models with significant internal bremsstrahlung

2013 ◽  
Vol 2013 (10) ◽  
pp. 025-025 ◽  
Author(s):  
Federica Giacchino ◽  
Laura Lopez-Honorez ◽  
Michel H.G Tytgat
Keyword(s):  
Dark Matter ◽  
Internal Bremsstrahlung

scholarly journals Internal bremsstrahlung signatures in light of direct dark matter searches

2013 ◽  
Vol 2013 (12) ◽  
pp. 046-046 ◽  
Author(s):  
Mathias Garny ◽  
Alejandro Ibarra ◽  
Miguel Pato ◽  
Stefan Vogl
Keyword(s):  
Dark Matter ◽  
Internal Bremsstrahlung ◽  
Direct Dark Matter

scholarly journals Loopy constraints on leptophilic dark matter and internal bremsstrahlung

2014 ◽  
Vol 2014 (04) ◽  
pp. 022-022 ◽  
Author(s):  
Joachim Kopp ◽  
Lisa Michaels ◽  
Juri Smirnov
Keyword(s):  
Dark Matter ◽  
Internal Bremsstrahlung

DARK MATTER CANDIDATES IN LEFT-RIGHT SYMMETRIC MODELS

2011 ◽  
Vol 20 (08) ◽  
pp. 1389-1397 ◽  
Author(s):  
WAN-LEI GUO ◽  
YUE-LIANG WU ◽  
YU-FENG ZHOU
Keyword(s):  
Dark Matter ◽  
Gamma Rays ◽  
Cosmic Ray ◽  
High Energy ◽  
Muon Flux ◽  
Symmetric Model ◽  
Internal Bremsstrahlung ◽  
Energy Gamma ◽  
Charged Leptons ◽  
Bremsstrahlung Process

We discuss an extended left-right symmetric model in which the decay of DM particle is induced by tiny soft charge-conjugation violating interactions, and calculate the spectra for cosmic-ray positrons, neutrinos and gamma-rays. The DM signals in the flux of high energy neutrinos can be significantly enhanced, as the triplets couple to both charged leptons and neutrinos. The predicted neutrino-induced muon flux can be several times larger than the case in which DM particle only directly decays into charged leptons. In addition, the charged components of the triplet give extra contributions to the high energy gamma-rays through internal bremsstrahlung process.

scholarly journals Vector dark matter annihilation with internal bremsstrahlung

2017 ◽  
Vol 766 ◽  
pp. 177-180 ◽  
Author(s):  
Gulab Bambhaniya ◽  
Jason Kumar ◽  
Danny Marfatia ◽  
Alekha C. Nayak ◽  
Gaurav Tomar
Keyword(s):  
Dark Matter ◽  
Dark Matter Annihilation ◽  
Internal Bremsstrahlung
Sign in / Sign up

Export Citation Format

Share Document