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Light Dark Matter and Superfluid He-4 from EFT

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arxiv 1911.07867 v1 pith:ERYPHFRL submitted 2019-11-18 hep-ph astro-ph.CO

Light Dark Matter and Superfluid He-4 from EFT

classification hep-ph astro-ph.CO
keywords superfluiddarkeffectivefieldhe-4mattertheoryagrees
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We study the response of a He-4 detector to the interaction of sub-GeV dark matter using an effective field theory for the superfluid. We compute the lifetime of the phonon, which agrees with what known from standard techniques, hence providing an important check of the effective field theory. We then study the process of emission of two phonons, and show how its rate is much more suppressed than the phase space expectations; this is a consequence of the conservation of the current associated to the superfluid symmetries.

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Cited by 1 Pith paper

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Coherence from interference: a solvable model of sub-GeV dark matter-nucleus scattering

    hep-ph 2026-07 conditional novelty 6.0

    In an exactly solvable 1D lattice, coherent and incoherent DM-nucleus structure factors differ only by a crystal-momentum delta function that becomes unimportant for n≥2 phonons, validating hybrid Inc+LW rate calculations.