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- W2775421783 abstract "The electron-positron excess reported by the DAMPE collaboration recently may be explained by an electrophilic dark matter (DM). A standard model singlet fermion may play the role of such a DM when it is stablized by some symmetries, such as a dark $U(1)_X^{}$ gauge symmetry, and dominantly annihilates into the electron-positron pairs through the exchange of a scalar mediator. The model, with appropriate Yukawa couplings, can well interpret the DAMPE excess. Naively one expects that in this type of models the DM-nucleon cross section should be small since there is no tree-level DM-quark interactions. We however find that at one-loop level, a testable DM-nucleon cross section can be induced for providing ways to test the electrophilic model. We also find that a $U(1)$ kinetic mixing can generate a sizable DM-nucleon cross section although the $U(1)_X^{}$ dark photon only has a negligible contribution to the DM annihilation. Depending on the signs of the mixing parameter, the dark photon can enhance/reduce the one-loop induced DM-nucleon cross section." @default.
- W2775421783 created "2017-12-22" @default.
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- W2775421783 date "2018-03-01" @default.
- W2775421783 modified "2023-10-17" @default.
- W2775421783 title "Electrophilic dark matter with dark photon: From DAMPE to direct detection" @default.
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- W2775421783 doi "https://doi.org/10.1016/j.physletb.2018.01.057" @default.
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