• M. Ferricha-Alami

      Articles written in Journal of Astrophysics and Astronomy

    • Tree Level Potential on Brane after Planck and BICEP2

      M. Ferricha-Alami A. Safsafi L. Lahlou H. Chakir M. Bennai

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      The recent detection of degree scale B-mode polarization in the Cosmic Microwave Background (CMB) by the BICEP2 experiment implies that the inflationary ratio of tensor-to-scalar fluctuations is 𝑟 = 0.2$^{+0.07}_{-0.05}$, which has opened a new window in the cosmological investigation. In this regard, we propose a study of the tree level potential inflation in the framework of the Randall–Sundrum type-2 braneworld model. We focus on three branches of the potential, where we evaluate some values of brane tension 𝜆. We discuss how the various inflationary perturbation parameters can be compatible with recent Planck and BICEP2 observations.

    • Braneworld Inflation in Supergravity with a Shift Symmetric K$\"{a}$hler Potential

      Z. Mounzi M. Ferricha-Alami A. Safsafi M. Bennai

      More Details Abstract Fulltext PDF

      We propose a new solution to the $\eta$-problem in supergravity using a shift symmetric K\"{a}hler potential in the context of the Randall–Sundrum type II model. We focus on a F-term supergravity inflation with a minimal K\"{a}hler potential taking into account the radiative corrections. The slow-roll conditions are ensured by the shift symmetry where a very small value of $\eta$ $(\eta \ll 1)$ is obtained. In this context, we derive all known spectrum inflationary parameters which are widely consistent with Planck 2015 data for a particular choice of brane tension and coupling constant values. A suitable observational central value of $n_{s}=0.96$ is also obtained in the case of minimal K$\"{a}$hler potential.

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