CMB imprints of high scale non-thermal leptogenesis

Abstract

We study the imprints of high scale non-thermal leptogenesis on cosmic microwave background (CMB) from the measurements of inflationary spectral index ($n_s$) and tensor-to-scalar ratio ($r$), which otherwise is inaccessible to the conventional laboratory experiments. We 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. We investigate two separate cases, (I) inflaton decays to radiation dominantly and (II) inflaton decays to RHN dominantly which further decays to the SM particles to reheat the Universe adequately. Considering a class of $\alpha -$ attractor inflation models, we obtain the allowed mass ranges for RHN for both cases and thereafter furnish the estimates for $n_s$ and $r$. The prescription proposed here is general and can be implemented in various kinds of single-field inflationary models given the conditions for non-thermal leptogenesis are satisfied.

arXiv commentAccepted for Publication in Physics Letter B

References in corpus (41)

• The Standard Model Higgs boson as the inflaton
• Towards the Theory of Reheating After Inflation
• Reheating after Inflation
• Oscillating neutrinos and mu --> e, gamma
• Encyclopaedia Inflationaris
• BICEP / Keck XIII: Improved Constraints on Primordial Gravitational Waves using Planck, WMAP, and BICEP/Keck Observations through the 2018 Observing Season
• A lower bound on the right-handed neutrino mass from leptogenesis
• Resonant Leptogenesis
• Leptogenesis for Pedestrians
• The $\nu$MSM, Dark Matter and Neutrino Masses
• Towards a complete theory of thermal leptogenesis in the SM and MSSM
• CP violating decays in leptogenesis scenarios
• A Measurement of Atmospheric Neutrino Oscillation Parameters by Super-Kamiokande I
• Precision Measurement of Neutrino Oscillation Parameters with KamLAND
• Determination of Solar Neutrino Oscillation Parameters using 1496 Days of Super-Kamiokande-I Data
• Constraints on Neutrino Oscillations Using 1258 Days of Super-Kamiokande Solar Neutrino Data
• The Unity of Cosmological Attractors
• CMB-S4: Forecasting Constraints on Primordial Gravitational Waves
• Leptogenesis in Inflaton Decay
• Leptogenesis from $\tilde{N}$-dominated early universe
• Leptogenesis in Inflationary Universe
• The Equation of State and Duration to Radiation Domination After Inflation
• GUT Baryogenesis after Preheating
• CP violation in neutrino oscillation and leptogenesis
• The POLARBEAR-2 and the Simons Array Experiment
• On the reheating stage after inflation
• Measurements of B-mode Polarization of the Cosmic Microwave Background from 500 Square Degrees of SPTpol Data
• Naturalness, Vacuum Stability and Leptogenesis in the Minimal Seesaw Model
• Leptogenesis in the two right-handed neutrino model revisited
• Three-Flavoured Non-Resonant Leptogenesis at Intermediate Scales
• The problem of the initial conditions in flavoured leptogenesis and the tauon N_2-dominated scenario
• Effects of reheating on leptogenesis
• Leptogenesis in Smooth Hybrid Inflation
• Connecting CMB anisotropy and cold dark matter phenomenology via reheating
• Non-thermal Leptogenesis from the Heavier Majorana Neutrinos
• Two phase reheating: CMB constraints on inflaton and dark matter phenomenology
• QUBIC: Exploring the primordial Universe with the Q\&U Bolometric Interferometer
• $B$-mode forecast of CMB-Bh$\overline{a}$rat
• CMB constraints on dark matter phenomenology via reheating in minimal plateau inflation
• Reheating-era leptogenesis
• Non-thermal leptogenesis with strongly hierarchical right handed neutrinos

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• Primordial Gravitational Waves as Probe of Dark Matter in Interferometer Missions: Fisher Forecast and MCMC
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• Leptogenesis and neutrino mass with one right-handed neutrino and Higgs inflaton