| Full text | |
| Author(s): |
Total Authors: 4
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| Affiliation: | [1] Observ Nacl, BR-20921400 Rio De Janeiro, RJ - Brazil
[2] Univ Antonio Narino, Ctr Invest, Bogota - Colombia
[3] Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua - Italy
[4] Univ Padua, Dipartimento Fis & Astron G Galilei, Padua - Italy
[5] Univ Fed Rio Grande do Norte, Int Inst Phys, Campus Univ, BR-59078970 Natal, RN - Brazil
Total Affiliations: 5
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| Document type: | Journal article |
| Source: | Physics Letters B; v. 812, JAN 10 2021. |
| Web of Science Citations: | 1 |
| Abstract | |
Currently, the standard cosmological model faces some tensions and discrepancies between observations at early and late cosmological time. One of them concerns the well-known H-0-tension problem, i.e., a similar to 4.4 sigma-difference between the early-time estimate and late-time measurements of the Hubble constant, H-0. Another puzzling question rests in the cosmological lithium abundance, where again local measurements differ from the one predicted by Big Bang Nucleosynthesis (BBN). In this work, we show that a mechanism of light dark matter production might hold the answer for these questions. If dark matter particles are sufficiently light and a fraction of them were produced non-thermally in association with photons, this mechanism has precisely what is needed to destroy Lithium without spoiling other BBN predictions. Besides, it produces enough radiation that leads to a larger H-0 value, reconciling early and late-time measurements of the Hubble expansion rate without leaving sizable spectral distortions in the Cosmic Microwave Background spectrum. (C) 2020 The Authors. Published by Elsevier B.V. (AU) | |
| FAPESP's process: | 16/01343-7 - ICTP South American Institute for Fundamental Research: a regional center for theoretical physics |
| Grantee: | Nathan Jacob Berkovits |
| Support Opportunities: | Special Projects |