Mirror dark matter cosmology - predictions for $N_{eff} [CMB]$ and $N_{eff} [BBN]$

R. Foot

doi:10.1016/j.physletb.2012.04.023

paper

Mirror dark matter cosmology - predictions for $N_{e f f} [C M B]$ and $N_{e f f} [B B N]$

arXiv:1111.6366 · doi:10.1016/j.physletb.2012.04.023

Abstract

Mirror dark matter interacting with ordinary matter via photon-mirror photon kinetic mixing can explain the DAMA, CoGeNT and CRESSTII direct detection experiments. This explanation requires kinetic mixing of strength $ε \sim 1 0^{- 9}$ . Such kinetic mixing will have important implications for early Universe cosmology. We calculate the additional relativistic energy density at recombination, $δ N_{e f f} [C M B]$ . We also calculate the effects for big bang nucleosynthesis, $δ N_{e f f} [B B N]$ . Current hints that both $δ N_{e f f} [C M B]$ and $δ N_{e f f} [B B N]$ are non-zero and positive can be accommodated within this framework if $ε \approx f e w \times 1 0^{- 9}$ . In the near future, measurements from the Planck mission will either confirm these hints or constrain $ε \sim < 1 0^{- 9}$ .

about 10 pages, matches published version

Mirror dark matter cosmology - predictions for $N_{e f f} [C M B]$ and $N_{e f f} [B B N]$

Abstract

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Mirror dark matter cosmology - predictions for Neff​[CMB] and Neff​[BBN]

Abstract

References in corpus (21)

Cited by in corpus (24)

Mirror dark matter cosmology - predictions for $N_{e f f} [C M B]$ and $N_{e f f} [B B N]$