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Inhomogeneous Energy Injection in the 21-cm Power Spectrum: Sensitivity to Dark Matter Decay
Yitian Sun, Joshua W. Foster, Hongwan Liu +2
The 21-cm signal provides a novel avenue to measure the thermal state of the universe during cosmic dawn and reionization (redshifts ), and thus to probe energy injecti…
The Quintuplet Annihilation Spectrum
Matthew Baumgart, Nicholas L. Rodd, Tracy R. Slatyer +1
We extend the Effective Field Theory of Heavy Dark Matter to arbitrary odd representations of SU(2) and incorporate the effects of bound states. This formalism is then deployed to…
Birth of the first stars amidst decaying and annihilating dark matter
Wenzer Qin, Julian B. Munoz, Hongwan Liu +1
The first stars are expected to form through molecular-hydrogen (H) cooling, a channel that is especially sensitive to the thermal and ionization state of gas, and can thus act…
Exotic energy injection in the early universe II: CMB spectral distortions and constraints on light dark matter
Hongwan Liu, Wenzer Qin, Gregory W. Ridgway +1
We calculate the post-recombination contribution to the Cosmic Microwave Background (CMB) spectral distortion due to general exotic energy injections, including dark matter (DM) de…
Exotic energy injection in the early universe I: a novel treatment for low-energy electrons and photons
Hongwan Liu, Wenzer Qin, Gregory W. Ridgway +1
Decaying or annihilating dark matter and other exotic energy injections can modify the spectrum of the universe's photon bath, resulting in e.g. new contributions to spectral disto…