A generalized method of constraining Warm Inflation with CMB data

Abstract

A thorough MCMC analysis of any inflationary model against the current cosmological data is essential for assessing the validity of such a model as a viable inflationary model. Warm Inflation, producing both thermal and quantum fluctuations, yield a complex form of scalar power spectrum, which, in general, cannot be directly written as a function of the comoving wavenumber $k$, an essential step to incorporate the primordial spectra into CAMB to do an MCMC analysis through CosmoMC/Cobaya. In this paper, we devised an efficient generalized methodology to mould the WI power spectra as a function of $k$, without the need of slow-roll approximation of the inflationary dynamics. The methodology is directly applicable to any Warm Inflation model, including the ones with complex forms of the dissipative coefficient and the inflaton potential.

arXiv comment25 pages plus 1 title page, single column, JCAP style, 14 figures, 6 tables, V2: 2 figures, some discussion and a few references added, conclusions unchanged. Version accepted for publication in JCAP

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