Comparing potential-driven DBI-inspired non-minimal kinetic coupling (Dinkic) inflation with observational data

  • In our previous work[1], a new kind of inflation model was proposed, which has the interesting property that its perturbation equation of motion gets a correction of k4, due to the non-linearity of the kinetic term. Nonetheless, the scale-invariance of the power spectrum remains valid, both in large-k and small-k limits. In this paper, we investigate in detail the spectral index, the index running and the tensor/scalar ratio in this model, especially in the potential-driven case, and compare the results with the current PLANCK/BICEP observational data. We also discuss the tensor spectrum in this case, which is expected to be tested by future observations of primordial gravitational waves.
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Jun Chen, Wenjie Hou, Taotao Qiu and Defu Hou. Comparing potential-driven DBI-inspired non-minimal kinetic coupling (Dinkic) inflation with observational data[J]. Chinese Physics C, 2018, 42(4): 045102. doi: 10.1088/1674-1137/42/4/045102
Jun Chen, Wenjie Hou, Taotao Qiu and Defu Hou. Comparing potential-driven DBI-inspired non-minimal kinetic coupling (Dinkic) inflation with observational data[J]. Chinese Physics C, 2018, 42(4): 045102.  doi: 10.1088/1674-1137/42/4/045102 shu
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Received: 2017-11-24
Revised: 2018-01-24
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    Supported by NSFC (11405069, 11653002, 11735007, 111375070)

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Comparing potential-driven DBI-inspired non-minimal kinetic coupling (Dinkic) inflation with observational data

    Corresponding author: Jun Chen,
    Corresponding author: Wenjie Hou,
    Corresponding author: Taotao Qiu,
    Corresponding author: Defu Hou,
  • 1. Key Laboratory of Quark and Lepton Physics(MOE), Central China Normal University, Wuhan 430079, China
  • 2. Institute of Particle Physics, Central China Normal University, Wuhan 430079, China
  • 3. Institute of Astrophysics, Central China Normal University, Wuhan 430079, China
  • 4. Institute of Astrophysics, Central China Normal University, Wuhan 430079, China
Fund Project:  Supported by NSFC (11405069, 11653002, 11735007, 111375070)

Abstract: In our previous work[1], a new kind of inflation model was proposed, which has the interesting property that its perturbation equation of motion gets a correction of k4, due to the non-linearity of the kinetic term. Nonetheless, the scale-invariance of the power spectrum remains valid, both in large-k and small-k limits. In this paper, we investigate in detail the spectral index, the index running and the tensor/scalar ratio in this model, especially in the potential-driven case, and compare the results with the current PLANCK/BICEP observational data. We also discuss the tensor spectrum in this case, which is expected to be tested by future observations of primordial gravitational waves.

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