Warm intermediate inflation in the Randall-Sundrum II model in the light of Planck 2015 and BICEP2 results: A general dissipative coefficient

TL;DR

This paper investigates warm intermediate inflation within the Randall-Sundrum II brane-world model, analyzing the effects of a general dissipative coefficient and constraining parameters using recent Planck 2015 and BICEP2 data.

Contribution

It introduces a generalized dissipative coefficient in warm inflation on the brane and explores both weak and strong dissipative regimes with observational constraints.

Findings

Model compatible with Planck 2015 and BICEP2 data

Constraints on dissipative coefficient parameters

Demonstrates viability of warm inflation in brane-world scenario

Abstract

A warm inflationary Universe in the Randall-Sundrum II model during intermediate inflation is studied. For this purpose, we consider a general form for the dissipative coefficient $\Gamma(T,\phi)=C_{\phi}\,\frac{T^{m}}{\phi^{m-1}}$, and also analyze this inflationary model in the weak and strong dissipative regimes. We study the evolution of the Universe under the slow-roll approximation and find solutions to the full effective Friedmann equation in the brane-world framework. In order to constrain the parameters in our model, we consider the recent data from the BICEP2-Planck 2015 data together with the necessary condition for warm inflation $T>H$, and also the condition from the weak (or strong) dissipative regime.