Planck 2015 results
Free Access

Fig. 5


Marginalized joint confidence contours for (ns,dns/ dlnk), at the 68% and 95% CL, in the presence of a non-zero tensor contribution, and using Planck TT+lowP or Planck TT, TE, EE+lowP. Constraints from the Planck 2013 data release are also shown for comparison. The thin black stripe shows the prediction of single-field monomial inflation models with 50 <N< 60.

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