Pair absorption of two dark matter particles in atomic transitions can probe electroweak-scale couplings of mu-eV-to-eV mass bosonic dark matter, and could bound the cosmic neutrino background overdensity near 10^9.
Generalised hydrogen interactions with $\texttt{CINCO}$: a window to new physics
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abstract
We present semi-analytic solutions for atomic transition rates in hydrogenic atoms induced by scalar, pseudoscalar, vector, axial-vector, and tensor interactions. Our results agree with quantum electrodynamics predictions to $\sim 0.005\,\%$ precision, and further allow us to calculate absorption and emission rates for axions, hidden photons, light scalars or other dark matter candidates for hydrogen and hydrogenic ions. These results can be used to inform searches for light new physics as well as in calculations relevant to searches for fifth forces or varying fundamental constants, with applications from astrophysics to laboratory spectroscopy experiments. We also provide a dedicated tool for the construction of hydrogenic transition amplitudes: "Computation of hydrogen radial INtegrals and COefficients" ($\texttt{CINCO}$).
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Dark matter pair absorption
Pair absorption of two dark matter particles in atomic transitions can probe electroweak-scale couplings of mu-eV-to-eV mass bosonic dark matter, and could bound the cosmic neutrino background overdensity near 10^9.