Dark matter with two- and many-body decays and supernovae type Ia

Abstract

We present a decaying dark matter scenario where the daughter products are a single massless relativistic particle and a single, massive but possibly relativistic particle. We calculate the velocity distribution of the massive daughter particle and its associated equation of state and derive its dynamical evolution in an expanding universe. In addition, we present a model of decaying dark matter where there are many massless relativistic daughter particles together with a massive particle at rest. We place constraints on these two models using supernovae type Ia observations. We find that for a daughter relativistic fraction of 1% and higher, lifetimes of at least less than 10 Gyrs are excluded, with larger relativistic fractions constraining longer lifetimes.

Replaced to match version accepted for publication in Phys. Rev. D

References in corpus (11)

• Observation of an anomalous positron abundance in the cosmic radiation
• A new measurement of the antiproton-to-proton flux ratio up to 100 GeV in the cosmic radiation
• The cosmic-ray electron flux measured by the PAMELA experiment between 1 and 625 GeV
• Contraints on radiative dark-matter decay from the cosmic microwave background
• INTEGRAL SPI All-Sky View in Soft Gamma Rays: Study of Point Source and Galactic Diffuse Emissions
• Cosmological Simulations of Decaying Dark Matter: Implications for Small-scale Structure of Dark Matter Halos
• Dark Matter Halos with Cores from Hierarchical Structure Formation
• Circumscribing Late Dark Matter Decays Model Independently
• Cosmological Constraints on Invisible Decay of Dark Matter
• Cosmological Implications of High-Energy Neutrino Emission from the Decay of Long-Lived Particle
• Daughters mimic sterile neutrinos (almost!) perfectly

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