Revisiting CMB constraints on warm inflation

Show simple item record Arya, Richa Dasgupta, Arnab Goswami, Gaurav Prasad, Jayanti Rangarajan, Raghavan 2018-03-27T05:52:47Z 2018-03-27T05:52:47Z 2018-02
dc.identifier.citation Arya, Richa; Dasgupta, Arnab; Goswami, Gaurav; Prasad, Jayanti and Rangarajan, Raghavan, “Revisiting CMB constraints on warm inflation”, Journal of Cosmology and Astroparticle Physics, DOI: 10.1088/1475-7516/2018/02/043, vol. 2018, no. 2, Feb. 2018. en_US
dc.identifier.issn 1475-7516
dc.description.abstract We revisit the constraints that Planck 2015 temperature, polarization and lensing data impose on the parameters of warm inflation. To this end, we study warm inflation driven by a single scalar field with a quartic self interaction potential in the weak dissipative regime. We analyse the effect of the parameters of warm inflation, namely, the inflaton self coupling λ and the inflaton dissipation parameter QP on the CMB angular power spectrum. We constrain λ and QP for 50 and 60 number of e-foldings with the full Planck 2015 data (TT, TE, EE + lowP and lensing) by performing a Markov-Chain Monte Carlo analysis using the publicly available code CosmoMC and obtain the joint as well as marginalized distributions of those parameters. We present our results in the form of mean and 68 % confidence limits on the parameters and also highlight the degeneracy between λ and QP in our analysis. From this analysis we show how warm inflation parameters can be well constrained using the Planck 2015 data. en_US
dc.description.statementofresponsibility by Richa Arya, Arnab Dasguptaa, Gaurav Goswamib, Jayanti Prasadc and Raghavan Rangarajana
dc.format.extent vol. 2018, no. 2
dc.language.iso en en_US
dc.publisher IOP Publishing en_US
dc.title Revisiting CMB constraints on warm inflation en_US
dc.type Article en_US
dc.relation.journal Journal of Cosmology and Astroparticle Physics

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