Cosmological Constraints on Unstable Particles: Numerical Bounds and Analytic Approximations

14 Feb 2019 Dienes Keith R. Kumar Jason Stengel Patrick Thomas Brooks

Many extensions of the Standard Model predict large numbers of additional unstable particles whose decays in the early universe are tightly constrained by observational data. For example, the decays of such particles can alter the ratios of light-element abundances, give rise to distortions in the cosmic microwave background, alter the ionization history of the universe, and contribute to the diffuse photon flux... (read more)

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  • HIGH ENERGY PHYSICS - PHENOMENOLOGY
  • COSMOLOGY AND NONGALACTIC ASTROPHYSICS