511 keV line from Q balls in the galactic center

Journal Article · Sat Oct 15 00:00:00 EDT 2005 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PhysRevD.72.085015· OSTI ID:20713769

Kasuya, Shinta ^[1]; Takahashi, Fuminobu ^[2]; Deutsches Elektronen-Synchrotron DESY, 22603 Hamburg ^[3]

---

1. Department of Information Science, Kanagawa University, Kanagawa 259-1293 (Japan)
2. Institute for Cosmic Ray Research, University of Tokyo, Chiba 277-8582 (Japan)
3. Germany

The 511 keV photons from the galactic center can be explained by positrons produced through Q-ball decay. In the scheme of gauge-mediated supersymmetry breaking, large Q balls with lepton charge are necessarily long-lived. In particular, the lifetime can be as long as (or even longer than) the age of the Universe. If kinematically allowed, such large Q balls decay into positrons, which eventually annihilate with electrons into 511 keV photons. Our scenario is realized within the minimal supersymmetric standard model in the inflationary universe, which is very plausible.

• OSTI ID: 20713769
• Journal Information: Physical Review. D, Particles Fields, Vol. 72, Issue 8; Other Information: DOI: 10.1103/PhysRevD.72.085015; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ELECTRONS
INFLATIONARY UNIVERSE
KEV RANGE
LIFETIME
PARTICLE DECAY
PHOTONS
POSITRONS
STANDARD MODEL
SUPERSYMMETRY
SYMMETRY BREAKING
UNIVERSE