511 keV Gamma Ray from Moduli Decay in the Galactic Bulge

Details 511 keV Gamma Ray from Moduli Decay in the Galactic Bulge 511 keV Gamma Ray from Moduli Decay in the Galactic Bulge

2005-05-19

arxiv.org/abs/hep-ph/0505167v2

Phys.Lett. B624 (2005) 162-165

Physics

High Energy Physics

High Energy Physics - Phenomenology

6 pages, no figure, we have added an appendix to describe the dilution of the moduli by the thermal inflation and some minor c

Scientific paper

10.1016/j.physletb.2005.07.063

We show that the $e^++e^-$ decay of a light scalar boson of mass 1-10 MeV may
account for the fluxes of 511 keV gamma ray observed by SPI/INTEGRAL. We argue
that candidates of such a light scalar boson is one of the string moduli or a
scalar partner of the axion in a supersymmetric theory.

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