Probing MeV Dark Matter at Low--Energy $e^+e^-$ Colliders

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dc.creatorBorodatchenkova, Natalia
dc.creatorChoudhury, Debajyoti
dc.creatorDrees, Manuel
dc.date2005-10-12
dc.date2006-04-12
dc.date.accessioned2026-07-07T11:04:48Z
dc.date.available2026-07-07T11:04:48Z
dc.descriptionIt has been suggested that the annihilation of Dark Matter particles χwith mass between 0.5 and 20 MeV into e^+e^- pairs could be responsible for the excess flux of 511 keV photons coming from the central region of our galaxy that has been detected by the IINTEGRAL satellite. The simplest way to achieve the required cross section for χpair annihilation while respecting existing constraints is to introduce a new vector boson U with mass M_U below a few hundred MeV. In this Letter we point out that over most of the allowed parameter space, the process e^+e^- to U γ, followed by the decay of U into either an e^+e^- pair or into an invisible (ν\bar νor χ\bar χ) channel, should lead to signals that can be detected by the B-factory experiments BaBar and Belle. A smaller, but still substantial, region of parameter space can also be probed at the Φfactory DAFNE.
dc.description4 pages, revtex with equation.sty (included), 2 embedded postscript figures. Minor changes, added a couple of references; version to appear in PRL
dc.identifierhttps://arxiv.org/abs/hep-ph/0510147
dc.identifierhttp://arxiv.org/abs/hep-ph/0510147
dc.identifierPhys.Rev.Lett.96:141802,2006
dc.identifierdoi:10.1103/PhysRevLett.96.141802
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/189019
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectHigh Energy Physics - Experiment
dc.titleProbing MeV Dark Matter at Low--Energy $e^+e^-$ Colliders
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