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Paper detail

Dark Matter, Dark Photon and Superfluid He-4 from Effective Field Theory

We consider a model of sub-GeV dark matter whose interaction with the Standard Model is mediated by a new vector boson (the dark photon) which couples kinetically to the photon. We describe the possibility of constraining such a model using a superfluid He-4 detector, by means of an effective theory for the description of the superfluid phonon. We find that such a detector could provide bounds that are competitive with other direct detection experiments only for ultralight vector mediator, in agreement with previous studies. As a byproduct we also present, for the first time, the low-energy effective field theory for the interaction between photons and phonons.

preprint2020arXivOpen access
A. CaputoA. EspositoE. GeoffrayA. D. PolosaS. Sun
hep-phhep-th
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A. CaputoA. EspositoE. GeoffrayA. D. PolosaS. Sun

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