Primordial black holes and secondary gravitational waves from generalized power-law non-canonical Higgs inflation

Soma Heydari, Kayoomars Karami
General Relativity and Quantum Cosmology, General Relativity and Quantum Cosmology (gr-qc)
2023-10-16 16:00:00
Primordial Black Holes (PBHs) could be promising candidate for not only the Dark Matter (DM) content of the universe but also the source of Gravitational Waves (GWs) observed by Ligo-Virgo. In the present work, generation of PBHs and secondary GWs from non-canonical Higgs inflation have been probed. It is elucidated that, Higgs potential in non-canonical setup with a generalized power-law Lagrangian density can source a consistent inflationary era with the latest observational data. Besides, we show that our model satisfies the swampland criteria. At the same time, defining a peaked function of inflaton field as non-canonical mass scale parameter $M(\phi)$ of the Lagrangian, gives rise to slow down the inflaton in a while. In this interim, namely Ultra-Slow-Roll (USR) stage, the amplitude of the curvature perturbations on small scales enlarges versus CMB scales. It has been illustrated that, further to the peaked aspect of the chosen non-canonical mass scale parameter, the amount of $\alpha$ parameter of the Lagrangian has enlarging impact on the amplitude of the scalar perturbations. As a consequence of adjusting three parameter Cases of this model, three Cases of PBHs in proper mass scopes to explain LIGO-VIRGO events, microlensing events in OGLE data and DM content in its totality, could be produced. It is indicated that, current density parameter spectra $(\Omega_{\rm GW_0})$ of the coeval GWs with these PBHs can be traced by various GWs observatories. In the end, power-law behavior of the spectra of $\Omega_{\rm GW_0}$ in terms of frequency has been examined. The logarithmic power index as $n=3-2/\ln(f_c/f)$ in the infrared regime is obtained for each Case of the model.
PDF: Primordial black holes and secondary gravitational waves from generalized power-law non-canonical Higgs inflation.pdf
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