WIMPs, FIMPs, and Inflaton phenomenology via reheating, CMB and $\Delta N_{eff}$

Abstract

In this paper, we extensively analyzed the reheating dynamics after inflation and looked into its possible implication on dark matter (DM) and inflaton phenomenology. We studied the reheating through various possible channels of inflaton going into massless scalars (bosonic reheating) and fermions (fermionic reheating) via non-gravitational and gravity-mediated decay processes. We further include the finite temperature effect on the decay process. Along with their precise roles in governing the dynamics, we compared the relative importance of different temperature-corrected decay channels in the gradual process of reheating depending on the reheating equation of state (EoS), which is directly related to inflaton potential. Particularly, the universal gravitational decay of inflaton is observed to play a very crucial role in the reheating process for a large range of inflaton decay parameters. For our study, we consider typical $\alpha$-attractor inflationary models. We further establish the intriguing connection among those different inflaton decay channels and the CMB power spectrum that can have profound implications in building up a unified model of inflation, reheating, and DM. We analyze both fermion and scalar DM with different physical processes being involved, such as gravitational scattering, thermal bath scattering, and direct inflaton decay. Gravitational decay can again be observed to play a crucial role in setting the maximum limit on DM mass that has already been observed earlier in the literature [52]. Depending on the coupling strength, we have analyzed in detail the production of both FIMP and WIMP-like DM during reheating and their detailed phenomenological implications from the perspective of various cosmological and laboratory experiments.

54 pages, 18 figures. This Arxive version is the same as the JHEP-published version

References in corpus (44)

• A Theory of Dark Matter
• Dark Matter Candidates from Particle Physics and Methods of Detection
• Secluded WIMP Dark Matter
• Cosmological viability of f(R)-gravity as an ideal fluid and its compatibility with a matter dominated phase
• Primordial Nucleosynthesis in the Precision Cosmology Era
• The Dawn of FIMP Dark Matter: A Review of Models and Constraints
• Light Dark Matter: Models and Constraints
• Asymmetric Dark Matter from Leptogenesis
• Reheating predictions in single field inflation
• Dark matter as a geometric effect in f(R) gravity
• Primordial Curvature Fluctuation and Its Non-Gaussianity in Models with Modulated Reheating
• Reheating and Post-inflationary Production of Dark Matter
• BBN And The CMB Constrain Neutrino Coupled Light WIMPs
• Inflaton Oscillations and Post-Inflationary Reheating
• Gravitational Production of Dark Matter during Reheating
• Dark Matter and Gauge Coupling Unification in Non-supersymmetric SO(10) Grand Unified Models
• Gravitational Effects on Inflaton Decay
• Dynamics of oscillating scalar field in thermal environment
• On Thermal Gravitational Contribution to Particle Production and Dark Matter
• Graviton Physics
• Gravitational portals in the early Universe
• CMB constraints on the inflaton couplings and reheating temperature in $\alpha$-attractor inflation
• Dissipative Effects on Reheating after Inflation
• Gravitational Portals with Non-Minimal Couplings
• Gravitational reheating
• BICEP/Keck Constraints on Attractor Models of Inflation and Reheating
• Freezing-in hadrophilic dark matter at low reheating temperatures
• Ultraviolet Freeze-in with a Time-dependent Inflaton Decay
• WIMPs during Reheating
• UV Freeze-in in Starobinsky Inflation
• Feebly Interacting Dark Matter Particle as the Inflaton
• Higgs boson induced reheating and ultraviolet frozen-in dark matter
• Increasing Temperature toward the Completion of Reheating
• Inflaton phenomenology via reheating in light of primordial gravitational waves and the latest BICEP/$Keck$ data
• Implications of time-dependent inflaton decay on reheating and dark matter production
• Minimal $R+R^2$ Supergravity Models of Inflation Coupled to Matter
• Dark Matter and Leptogenesis from Gravitational Production
• Two phase reheating: CMB constraints on inflaton and dark matter phenomenology
• On finite density effects on cosmic reheating and moduli decay and implications for Dark Matter production
• Unitarity limits on thermal dark matter in (non-)standard cosmologies
• Reheating Constraints on Inflaton, Dark Matter: Swampland Conjecture
• Long lived inert Higgs in fast expanding universe and its imprint on cosmic microwave background
• Superheavy WIMP dark matter from incomplete thermalization
• Gravitational SIMPs

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• Primordial Gravitational Waves as Probe of Dark Matter in Interferometer Missions: Fisher Forecast and MCMC
• Lepton collider as a window to reheating via freezing in dark matter detection. Part II
• Thermal and nonthermal dark matters with gravitational neutrino reheating
• Reheating constraints on modified quadratic chaotic inflation
• Multi-messenger FIMP
• WIMP dark matter in bulk viscous non-standard cosmologies
• Gravitational waves induced by matter isocurvature in general cosmologies
• Post-inflationary production of particle Dark Matter: Hilltop and Coleman-Weinberg inflation
• Scrutinizing Fermionic Dark Matter in Scotogenic Model with Low Reheating Temperature
• Freeze-in and freeze-out production of Higgs portal Majorana fermionic dark matter during and after reheating
• Evaporation of Primordial Black Holes in a Thermal Universe: A Thermofield Dynamics Approach
• ACT DR6 Insights on the Inflationary Attractor models and Reheating
• The Resurgence of the G(2) Group for the Strong Sector and the Emergence of Dark Matter