4 papers
Reappraisal of the Constraints on Heavy Axion-like Particles from Gamma-Ray Bursts
Christopher V. Cappiello, Saurav Das, P. S. Bhupal Dev +2
We reassess existing limits and derive new constraints on heavy axion-like particle (ALP) coupling to photons using gamma-ray bursts (GRBs). ALPs can be produced in the hot dense f…
The Affleck-Dine Curvaton
Aurora Ireland, Gordan Krnjaic, Takuya Okawa
The Standard Model of particle physics does not explain the origin of the universe's baryon asymmetry or its primordial fluctuations. The Affleck-Dine mechanism is a well-motivated…
Old neutron stars as a new probe of relic neutrinos and sterile neutrino dark matter
Saurav Das, P. S. Bhupal Dev, Takuya Okawa +1
We study the kinetic cooling (heating) of old neutron stars due to coherent scattering with relic neutrinos (sterile neutrino dark matter) via Standard Model neutral-current intera…
Probing Heavy Axion-like Particles from Massive Stars with X-rays and Gamma Rays
James H. Buckley, P. S. Bhupal Dev, Francesc Ferrer +1
The hot interiors of massive stars in the later stages of their evolution provide an ideal place for the production of heavy axion-like particles (ALPs) with mass up to O(100 keV)…