publication . Article . Preprint . 2017

Novel Cosmic-Ray Electron and Positron Constraints on MeV Dark Matter Particles.

Julien Lavalle; Pierre Salati; Mathieu Boudaud;
Open Access English
  • Published: 01 Jan 2017
  • Publisher: HAL CCSD
  • Country: France
Abstract
MeV dark matter (DM) particles annihilating or decaying to electron-positron pairs cannot, in principle, be observed via local cosmic-ray (CR) measurements because of the shielding solar magnetic field. In this letter, we take advantage of spacecraft Voyager 1's capacity for detecting interstellar CRs since it crossed the heliopause in 2012. This opens up a new avenue to probe DM in the sub-GeV energy/mass range that we exploit here for the first time. From a complete description of the transport of electrons and positrons at low energy, we derive predictions for both the secondary astrophysical background and the pair production mechanisms relevant to DM annihi...
Subjects
arXiv: Astrophysics::High Energy Astrophysical Phenomena
free text keywords: [PHYS.ASTR.HE]Physics [physics]/Astrophysics [astro-ph]/High Energy Astrophysical Phenomena [astro-ph.HE], [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph], Astrophysics - High Energy Astrophysical Phenomena, High Energy Physics - Phenomenology, Cosmic ray, Heliosphere, Annihilation, Cosmic background radiation, Nuclear physics, Cosmic microwave background, Pair production, Positron, Particle physics, Dark matter, Physics
Funded by
EC| InvisiblesPlus
Project
InvisiblesPlus
InvisiblesPlus
  • Funder: European Commission (EC)
  • Project Code: 690575
  • Funding stream: H2020 | MSCA-RISE
,
EC| ELUSIVES
Project
ELUSIVES
The Elusives Enterprise: Asymmetries of the Invisible Universe
  • Funder: European Commission (EC)
  • Project Code: 674896
  • Funding stream: H2020 | MSCA-ITN-ETN
,
EC| NEWDARK
Project
NEWDARK
New Directions in Dark Matter Phenomenology at the TeV scale
  • Funder: European Commission (EC)
  • Project Code: 278234
  • Funding stream: FP7 | SP2 | ERC
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