DBI Galileon inflation in the light of Planck 2015

@article{Kumar2015DBIGI,
  title={DBI Galileon inflation in the light of Planck 2015},
  author={K. Sravan Kumar and Juan Carlos Bueno S{\'a}nchez and Celia Escamilla-Rivera and Jo{\~a}o Pedro Marto and Paulo Vargas Moniz},
  journal={Journal of Cosmology and Astroparticle Physics},
  year={2015},
  volume={2016},
  pages={063 - 063}
}
In this work we consider a DBI Galileon (DBIG) inflationary model and constrain its parameter space with the Planck 2015 and BICEP2/Keck array and Planck (BKP) joint analysis data by means of a potential independent analysis. We focus our attention on inflationary solutions characterized by a constant or varying sound speed as well as warp factor. We impose bounds on stringy aspects of the model, such as the warp factor (f) and the induced gravity parameter (m̃). We study the parameter space of… 
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28 Citations

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References

SHOWING 1-10 OF 85 REFERENCES
DBI Galileon in the Effective Field Theory of Inflation: Orthogonal non-Gaussianities and constraints from the Trispectrum
Very few explicit inflationary scenarios are known to generate a large bispectrum of orthogonal shape. Dirac-Born-Infeld Galileon inflation, in which an induced gravity term is added to the DBI…
Observational constraints on Tachyon and DBI inflation
We present a systematic method for evaluation of perturbation observables in non-canonical single-field inflation models within the slow-roll approximation, which allied with field redefinitions…
Orthogonal non-Gaussianity in DBI galileon: prospect for Planck polarization and post-Planck experiments
In this paper, we study cosmic microwave background (CMB) constraints on primordial non-Gaussianity in Dirac–Born–Infeld (DBI) galileon models in which an induced gravity term is added to the DBI…
DBI Galileon inflation in background SUGRA
Detecting primordial B-modes after Planck
We update the forecasts for the measurement of the tensor-to-scalar ratio r for various ground-based experiments (AdvACT, CLASS, Keck/BICEP3, Simons Array, SPT-3G), balloons (EBEX 10k and Spider) and…
Primordial fluctuations and non-Gaussianities from multifield DBI Galileon inflation
We study a cosmological scenario in which the DBI action governing the motion of a D3-brane in a higher-dimensional spacetime is supplemented with an induced gravity term. The latter reduces to the…
Planck 2015. XX. Constraints on inflation
We analyse the implications of the Planck data for cosmic inflation. The Planck nominal mission temperature anisotropy measurements, combined with the WMAP large-angle polarization, constrain the…
Consistency relation in power law G-inflation
In the standard inflationary scenario based on a minimally coupled scalar field, canonical or non-canonical, the subluminal propagation of speed of scalar perturbations ensures the following…
Joint analysis of BICEP2/keck array and Planck Data.
TLDR
Strong evidence for dust and no statistically significant evidence for tensor modes is found and various model variations and extensions are probe, including adding a synchrotron component in combination with lower frequency data, and find that these make little difference to the r constraint.
Phenomenology of D-brane inflation with general speed of sound
A characteristic of D-brane inflation is that fluctuations in the inflaton field can propagate at a speed significantly less than the speed of light. This yields observable effects that are distinct…
...
...