Constraint on the primordial gravitational waves from the joint analysis of BICEP2 and Planck HFI 353 GHz dust polarization data

We make a joint analysis of BICEP2 and recently released Planck HFI 353 GHz dust polarization data, and find that there is no evidence for the primordial gravitational waves and the bound on the tensor-to-scalar ratio becomes r < 0.083 at 95% confidence level in the base ΛCDM + tensor model. Extending to the model with running of scalar spectral index, the bound is a little bit relaxed to r < 0.116 at 95% confidence level. Our results imply that the inflation model with a single monomial potential is marginally disfavored at around 95% confidence level. Especially, the m(2)phi(2)/2 inflation model is disfavored at more than 2σ level. However, the Starobinsky inflation model gives a nice fit.

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12 pages, 1 table, 3 figures; version accepted by JCAP

inflation
gravitational waves and CMBR polarization
cosmological parameters from CMBR
inflation: model
gravitational radiation: primordial
model: tensor
power spectrum: scalar
cosmic background radiation: polarization
satellite: Planck
BICEP

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Figures(3)

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