CMB signature of non-thermal Dark Matter produced from self-interacting dark sector

Abstract

The basic idea of this work is to achieve the observed relic density of a non-thermal dark matter(DM) and its connection with Cosmic Microwave Background (CMB) via additional relativistic degrees of freedom which are simultaneously generated during the period $T_{\mathrm{BBN}}\mathrm{to}{T}_{\mathrm{CMB}}$ from a long-lived dark sector particle. To realize this phenomena we minimally extend the type-I seesaw scenario with a Dirac fermion singlet($\chi$) and a complex scalar singlet ($\phi$) which transform non-trivially under an unbroken symmetry ${\mathcal{Z}}_3$. $\chi$ being the lightest particle in the dark sector acts as a stable dark matter candidate while the next to lightest state $\phi$ operates like a long lived dark scalar particle. The initial density of $\phi$ can be thermally produced through either self-interacting number changing processes ($3\phi \to 2\phi$) within dark sector or the standard annihilation to SM particles ($2\phi \to 2\mathrm{SM}$). The late time (after neutrino decoupling) non-thermal decay of $\phi$ can produce dark matter in association with active neutrinos. The presence of extra relativistic neutrino degrees of freedom at the time of CMB can have a significant impact on $\Delta {\mathrm{N}}_{\mathrm{eff}}$. Thus the precise measurement of $\Delta {\mathrm{N}}_{\mathrm{eff}}$ by current PLANCK 2018 collaboration and future experiments like SPT-3G and CMB-S4 can indirectly probe this non-thermal dark matter scenario which is otherwise completely secluded due to its tiny coupling with the standard model.

Accepted for publication in JCAP

References in corpus (49)

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
• A direct empirical proof of the existence of dark matter
• Observation of electron-antineutrino disappearance at Daya Bay
• Results from a search for dark matter in the complete LUX exposure
• Dark Matter Candidates from Particle Physics and Methods of Detection
• Too big to fail? The puzzling darkness of massive Milky Way subhaloes
• Indication of Electron Neutrino Appearance from an Accelerator-produced Off-axis Muon Neutrino Beam
• Constraints on the Self-Interaction Cross-Section of Dark Matter from Numerical Simulations of the Merging Galaxy Cluster 1E 0657-5
• Dark Matter Results from First 98.7-day Data of PandaX-II Experiment
• The Dawn of FIMP Dark Matter: A Review of Models and Constraints
• Searching for Dark Matter Annihilation in Recently Discovered Milky Way Satellites with Fermi-LAT
• Right-Handed Neutrinos at LHC and the Mechanism of Neutrino Mass Generation
• The effects of He I 10830 on helium abundance determinations
• Light Dark Matter: Models and Constraints
• Relic neutrino decoupling with flavour oscillations revisited
• Dark Matter Search Results from the Complete Exposure of the PICO-60 C${}_3$F${}_8$ Bubble Chamber
• A precision calculation of relic neutrino decoupling
• Review of LHC Dark Matter Searches
• Gamma Ray Signals from Dark Matter: Concepts, Status and Prospects
• Probing reheating temperature of the universe with gravitational wave background
• BBN And The CMB Constrain Neutrino Coupled Light WIMPs
• Probing Physics Beyond the Standard Model: Limits from BBN and the CMB Independently and Combined
• How warm are non-thermal relics? Lyman-$\alpha$ bounds on out-of-equilibrium dark matter
• Cold keV dark matter from decays and scatterings
• Lyman-$\alpha$ constraints on freeze-in and superWIMPs
• keV Sterile Neutrino Dark Matter from Singlet Scalar Decays: The Most General Case
• Maximizing Direct Detection with Highly Interactive Particle Relic Dark Matter
• Dark Radiation Emerging After Big Bang Nucleosynthesis?
• Lower Mass Bounds on FIMP Dark Matter Produced via Freeze-In
• Mitigating Direct Detection Bounds in Non-minimal Higgs Portal Scalar Dark Matter Models
• Freeze-in Production of Sterile Neutrino Dark Matter in U(1)${}_{\mathrm{B}-\mathrm{L}}$ Model
• Freezing-in hadrophilic dark matter at low reheating temperatures
• Type II Dirac Seesaw with Observable $\Delta N_{\mathrm{eff}}$ in the light of W-mass Anomaly
• Higgs-boson visible and invisible constraints on hidden sectors
• Improved bounds on ${\mathbb{Z}}_3$ singlet dark matter
• Calculation of Momentum Distribution Function of a Non-thermal Fermionic Dark Matter
• Self-interacting freeze-in dark matter in a singlet doublet scenario
• Seesaw determination of the dark matter relic density
• Freeze-in Dark Matter via Light Dirac Neutrino Portal
• Concealing Dirac neutrinos from cosmic microwave background
• Long lived inert Higgs in fast expanding universe and its imprint on cosmic microwave background
• Simple estimate of BBN sensitivity to light freeze-in dark matter
• High Energy Sphalerons for Baryogenesis at Low Temperatures
• Was Entropy Conserved between BBN and Recombination?
• Light dark matter from dark sector decay
• The Hubble Rate Trouble: An Effective Field Theory of Dark Matter
• Imprints of MeV Scale Hidden Dark Sector at Planck Data
• Dark Matter phenomenology : from simplified WIMP models to refined alternative solutions

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