2005/10/31 by Natalia Borodatchenkova, Debajyoti Choudhury, Manuel Drees · 3 citations
Physics and Astronomy · #Annihilation #Astrophysics #Boson #Dark Matter and Cosmic Phenomena #Dark matter #Galaxy #Nuclear physics #Parameter space #Particle Detector Development and Performance #Particle physics #Particle physics theoretical and experimental studies #Physics #Statistics #hep-ex #hep-ph
paper · pdf · doi:10.1103/physrevlett.96.141802
published as Phys.Rev.Lett.96:141802,2006 · 4 pages, revtex with equation.sty (included), 2 embedded postscript figures. Minor changes, added a couple of references; version to appear in PRL
arxiv created 2006/04/12 · openalex publication_date 2006/04/14 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
It has been suggested that the pair annihilation of dark matter particles \ensuremathχ with mass between 0.5 and 20 MeV into e+e^\ensuremath- pairs could be responsible for the excess flux (detected by the INTEGRAL satellite) of 511 keV photons coming from the central region of our Galaxy. The simplest way to achieve the required cross section while respecting existing constraints is to introduce a new vector boson U with mass MU below a few hundred MeV. We point out that over most of the allowed parameter space, the process e+e^\ensuremath-\ensuremath→U\ensuremathγ, followed by the decay of U into either an e+e^\ensuremath- pair or an invisible (\ensuremathν\ensuremathν or \ensuremathχ\ensuremathχ) channel, should lead to signals detectable by current B-factory experiments. A smaller, but still substantial, region of parameter space can also be probed at the \ensuremathΦ factory DA\ensuremathΦNE.