4 papers
Tremaine-Gunn Control: Evading Bounds on Light Fermion Dark Matter
Joel Barir, Diego Blas, Anubhav Mathur +1
Pauli exclusion is often regarded as imposing a model-independent lower bound on the mass of fermionic dark matter in galaxies. We show that dark-sector interactions can substantia…
Thermo-Coupled Early Dark Energy
Marc Kamionkowski, Anubhav Mathur
Early dark energy solutions to the Hubble tension introduce an additional scalar field which is frozen at early times but becomes dynamical around matter-radiation equality. In ord…
Fireball anti-nucleosynthesis
Michael A. Fedderke, David E. Kaplan, Anubhav Mathur +2
The tentative identification of approximately ten relativistic anti-helium cosmic-ray events at AMS-02 would, if confirmed, challenge our understanding of the astrophysical synthes…
Cosmic Birefringence from CP-Violating Axion Interactions
Xuheng Luo, Anubhav Mathur
We explore the cosmic birefringence signal produced by an ultralight axion field with a small CP-violating coupling to bulk SM matter in addition to the usual CP-preserving photon…