The WMAP7 parameter constraints for the μ annihilation channel. Along with two annihilation parameters log 10(mDM) and ⟨ σAυ ⟩ /mDM, we also show the constraints on the other 6-parameter ΛCDM background model: ΩBh2, ΩDMh2, H0, τ, nS, log 10(AS). From the inside out the colored 2D areas show the 1-sigma and 2-sigma regions after marginalization over the other parameters, and the dashed lines show the same regions for the basic 6-parameter ΛCDM without annihilating DM. The topmost panels in each column plot the marginalized 1D probability distributions for all of the parameters.
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