Galactic 511 keV line from MeV millicharged dark matter

Ji Haeng Huh, Jihn E. Kim, Jong Chul Park, Seong Chan Park

Research output: Contribution to journalArticle

47 Citations (Scopus)

Abstract

We present a possible explanation of the recently observed 511 keV γ-ray anomaly with a new "millicharged" fermion. The new fermion is light [O(MeV)] but has never been observed by any collider experiments mainly because of its tiny electromagnetic charge εe. We show that constraints from its relic density in the Universe and collider experiments allow a parameter range such that the 511 keV cosmic γ-ray emission from the galactic bulge may be due to positron production from this millicharged fermion.

Original languageEnglish
Article number123503
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume77
Issue number12
DOIs
Publication statusPublished - 2008 Jun 3

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dark matter
fermions
galactic bulge
cosmic rays
positrons
rays
universe
anomalies
electromagnetism

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

Cite this

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Galactic 511 keV line from MeV millicharged dark matter. / Huh, Ji Haeng; Kim, Jihn E.; Park, Jong Chul; Park, Seong Chan.

In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 77, No. 12, 123503, 03.06.2008.

Research output: Contribution to journalArticle

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