Planck 2013 results
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Table 11

Improvement in fit and logarithm of the Bayes factor B0X with respect to power law ΛCDM and best fit parameter values for the wiggles, step inflation, and cutoff models (the larger lnB0X, the greater the preference for a featureless power law spectrum).

Model −2Δlnℒmax lnB0X Parameter Best fit value

Wiggles 9.0 1.5 α w 0.0294
ω 28.90
ϕ 0.075·2π
Step inflation 11.7 0.3 0.102
ln(ηf/ Mpc) 8.214
lnxd 4.47
Cutoff 2.9 0.3 −8.493
λ c 0.474

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