Speaker
Dibyendu Nanda
(Korea Institute for Advanced Study)
Description
I will discuss the possible imprints of high-scale non-thermal leptogenesis on cosmic microwave background (CMB) from the measurements of inflationary observables such as spectral index ($n_s$) and tensor-to-scalar (r) ratio, which otherwise is inaccessible to the conventional laboratory experiments. I will argue that non-thermal production of baryon (lepton) asymmetry from subsequent decays of inflaton to heavy right-handed neutrinos (RHN) and RHN to SM leptons is sensitive to the reheating dynamics in the early Universe after the end of inflation. Such dependence provides detectable imprints on the $n_s$ - $r$ plane which is well constrained by the Planck experiment.
Author
Dibyendu Nanda
(Korea Institute for Advanced Study)
Co-authors
Abhijit Kumar Saha
(Indian Association for the Cultivation of Science)
Anish Ghoshal
(University of Warsaw, Poland)
