Probing MeV dark matter at low-energy e+e- colliders

Borodatchenkova, Natalia ; Choudhury, Debajyoti ; Drees, Manuel (2006) Probing MeV dark matter at low-energy e+e- colliders Physical Review Letters, 96 (14). 141802_1-141802_4. ISSN 0031-9007

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Official URL: http://prl.aps.org/abstract/PRL/v96/i14/e141802

Related URL: http://dx.doi.org/10.1103/PhysRevLett.96.141802

Abstract

It has been suggested that the pair annihilation of dark matter particles χ with mass between 0.5 and 20 MeV into e+e- 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-→Uγ, followed by the decay of U into either an e+e- pair or an invisible (νν̅ or χχ̅ ) 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 Φ factory DAΦNE.

Item Type:Article
Source:Copyright of this article belongs to The American Physical Society.
ID Code:62210
Deposited On:20 Sep 2011 09:51
Last Modified:18 May 2016 11:35

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