2 code implementations • 8 Sep 2020 • Andrea Caputo, Hongwan Liu, Siddharth Mishra-Sharma, Maxim Pospelov, Joshua T. Ruderman, Alfredo Urbano
Within the context of a kinetically mixed dark photon, we demonstrate how resonant dark photon-to-photon conversions can imprint distinctive spectral features in the observed 21-cm brightness temperature, with implications for current, upcoming, and proposed experiments targeting the cosmic dawn and the dark ages.
Cosmology and Nongalactic Astrophysics High Energy Physics - Phenomenology
no code implementations • 3 Aug 2020 • Hongwan Liu, Wenzer Qin, Gregory W. Ridgway, Tracy R. Slatyer
We derive new constraints on models of decaying and annihilating dark matter (DM) by requiring that the energy injected into the intergalactic medium (IGM) not overheat it at late times, when measurements of the Lyman-$\alpha$ forest constrain the IGM temperature.
Cosmology and Nongalactic Astrophysics High Energy Physics - Phenomenology
2 code implementations • 14 Apr 2020 • Andrea Caputo, Hongwan Liu, Siddharth Mishra-Sharma, Joshua T. Ruderman
A dark photon may kinetically mix with the Standard Model photon, leading to observable cosmological signatures.
Cosmology and Nongalactic Astrophysics High Energy Physics - Phenomenology
2 code implementations • 12 Feb 2020 • Andrea Caputo, Hongwan Liu, Siddharth Mishra-Sharma, Joshua T. Ruderman
A dark photon may kinetically mix with the ordinary photon, inducing oscillations with observable imprints on cosmology.
Cosmology and Nongalactic Astrophysics High Energy Physics - Phenomenology
1 code implementation • 19 Apr 2019 • Hongwan Liu, Gregory W. Ridgway, Tracy R. Slatyer
We present a new public Python package, DarkHistory, for computing the effects of dark matter annihilation and decay on the temperature and ionization history of the early universe.
Cosmology and Nongalactic Astrophysics High Energy Astrophysical Phenomena High Energy Physics - Phenomenology
no code implementations • 5 Sep 2018 • Hongwan Liu, Brodi D. Elwood, Matthew Evans, Jesse Thaler
Axion-like particles are a broad class of dark matter candidates which are expected to behave as a coherent, classical field with a weak coupling to photons.
High Energy Physics - Phenomenology Cosmology and Nongalactic Astrophysics Instrumentation and Detectors Optics
