Novel Way to Search for Light Dark Matter in Lepton Beam-Dump Experiments.
Phys Rev Lett
; 121(4): 041802, 2018 Jul 27.
Article
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| MEDLINE
| ID: mdl-30095943
ABSTRACT
A novel mechanism to produce and detect light dark matter in experiments making use of GeV electrons (and positrons) impinging on a thick target (beam dump) is proposed. The positron-rich environment produced by the electromagnetic shower allows us to produce an A^{'} via nonresonant (e^{+}+e^{-}âγ+A^{'}) and resonant (e^{+}+e^{-}âA^{'}) annihilation on atomic electrons. The latter mechanism, for some selected kinematics, results in a larger sensitivity with respect to limits derived by the commonly used A^{'}-strahlung. This idea, applied to beam-dump experiments and active beam-dump experiments, pushes down the current limits by an order of magnitude.
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MEDLINE
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Revista:
Phys Rev Lett
Año:
2018
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Article
País de afiliación:
Italia