279 citations · 2.4k across the 48 of their papers we have counts for
8 papers · 1 filter
Light Dark Matter and Superfluid He-4 from EFT
Andrea Caputo, Angelo Esposito, Antonio D. Polosa
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…
Searching for Sterile Neutrino with X-ray Intensity Mapping
A. Caputo, M. Regis, M. Taoso
The cosmological X-ray emission associated to the possible radiative decay of sterile neutrinos is composed by a collection of lines at different energies. For a given mass, each l…
Dark Matter, Dark Photon and Superfluid He-4 from Effective Field Theory
A. Caputo, A. Esposito, E. Geoffray +2
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…
No chiral light bending by clumps of axion-like particles
Diego Blas, Andrea Caputo, Mikhail M. Ivanov +1
We study the propagation of light in the presence of a parity-violating coupling between photons and axion-like particles (ALPs). Naively, this interaction could lead to a split of…
Sub-MeV Dark Matter and the Goldstone Modes of Superfluid Helium
Andrea Caputo, Angelo Esposito, Antonio D. Polosa
We show how the relativistic effective field theory for the superfluid phase of helium-4 can replace the standard methods used to compute the production rates of low momentum excit…
Cosmic implications of a low-scale solution to the axion domain wall problem
Andrea Caputo, Mario Reig
The post-inflationary breaking of Peccei-Quinn (PQ) symmetry can lead to the cosmic domain wall catastrophe. In this Letter we show how to avoid domain walls implementing the Insta…
Constraints on millicharged dark matter and axion-like particles from timing of radio waves
Andrea Caputo, Laura Sberna, Miguel Frias +4
We derive novel constraints on millicharged dark matter and ultralight axion-like particles using pulsar timing and fast radio burst observations. Millicharged dark matter affects…
Radiative Axion Inflation
Andrea Caputo
Planck data robustly exclude the simple scenario for inflation. This is also the case for models of Axion Inflation in which the inflaton field is the radial part of the Pec…