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

Journal Article · Mon Dec 01 00:00:00 EST 2014 · Journal of Cosmology and Astroparticle Physics

DOI:https://doi.org/10.1088/1475-7516/2014/12/044· OSTI ID:22382060

Cheng, Cheng; Huang, Qing-Guo; Wang, Sai ^[1]

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1. State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Science, Beijing 100190 (China)

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{sup 2}φ{sup 2}/2 inflation model is disfavored at more than 2σ level. However, the Starobinsky inflation model gives a nice fit.

• OSTI ID: 22382060
• Journal Information: Journal of Cosmology and Astroparticle Physics, Vol. 2014, Issue 12; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 1475-7516
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
COSMOLOGICAL INFLATION
DUSTS
GHZ RANGE 100-1000
GRAVITATIONAL WAVES
INDEXES
LIMITING VALUES
POLARIZATION
POTENTIALS
SCALARS
TENSORS