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arXiv · 1911.04511

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

A. Caputo·A. Esposito·E. Geoffray·A. D. Polosa·S. Sun
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Abstract

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.

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A. Caputo, A. Esposito, E. Geoffray, A. D. Polosa, S. Sun. 2019-11-11. Dark Matter, Dark Photon and Superfluid He-4 from Effective Field Theory. https://doi.org/10.1016/j.physletb.2020.135258

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