| Full text | |
| Author(s): |
de Jesus, Alvaro S.
;
Paixao, Matheus M. A.
;
da Silva, Deivid R.
;
Queiroz, Farinaldo S.
;
Pinto-Neto, Nelson
Total Authors: 5
|
| Document type: | Journal article |
| Source: | Nuclear Physics B; v. 1014, p. 14-pg., 2025-05-01. |
| Abstract | |
The tension between direct measurements of the Hubble constant and those stemming from Cosmic Microwave Background probes has triggered a multitude of studies. The connection between cosmology and particle physics has shown to be a valuable approach to addressing the Hubble tension. In particular, increasing the number of relativistic degrees of freedom in the early universe helps alleviate the problem. In this work, we write down effective field theory describing relativistic dark matter production in association with neutrinos leading to a larger H0. We derive limits on the effective energy scale that governs this relativistic production of dark matter as a function of the dark matter mass for fermion, vector, and scalar dark matter fields. In particular, scalar dark matter particles are more effective in increasing the effective number of relativistic species. Also, if they have GeV scale masses, then the relativistic production of dark matter should be governed by Planck scale effective operators in order to alleviate the Hubble tension. (AU) | |
| FAPESP's process: | 23/01197-4 - Closing in on Dark Matter at the LHC |
| Grantee: | Yoxara Sánchez Villamizar |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |
| FAPESP's process: | 23/13126-4 - Probing dark sectors with neutrino physics and low-energy accelerators |
| Grantee: | Álvaro Santos de Jesus |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |
| FAPESP's process: | 21/14335-0 - ICTP South American Institute for Fundamental Research: a regional center for Theoretical Physics |
| Grantee: | Nathan Jacob Berkovits |
| Support Opportunities: | Special Projects |
| FAPESP's process: | 18/25225-9 - São Paulo Research and Analysis Center |
| Grantee: | Sergio Ferraz Novaes |
| Support Opportunities: | Special Projects |
| FAPESP's process: | 21/01089-1 - Cherenkov Telescope Array: construction and first discoveries |
| Grantee: | Luiz Vitor de Souza Filho |
| Support Opportunities: | Special Projects |