https://doi.org/10.1140/epjc/s10052-024-13267-7
Regular Article - Theoretical Physics
Testing the coupling of dark radiations in light of the Hubble tension
1
Department of Astronomy, School of Physical Sciences, University of Science and Technology of China, 230026, Hefei, Anhui, China
2
School of Astronomy and Space Science, University of Science and Technology of China, 230026, Hefei, Anhui, China
3
CAS Key Laboratory for Researches in Galaxies and Cosmology, University of Science and Technology of China, 230026, Hefei, Anhui, China
4
Kavli IPMU (WPI), UTIAS The University of Tokyo, 5-1-5 Kashiwanoha, 277-8583, Kashiwa, Chiba, Japan
5
Department of Computer Science, Mohammad Ali Jinnah University, Block-6, P.E.C.H.S, Karachi-75400 Sindh, Pakistan
Received:
3
January
2024
Accepted:
18
August
2024
Published online:
9
September
2024
We are studying the effects of Self-Interacting dark radiation (SIdr) on the evolution of the universe. Our main focus is on the cosmic microwave background (CMB) and how SIdr could potentially help resolve the Hubble tension. We are looking into different scenarios by mixing SIdr with Free-Streaming dark radiation (FSdr) or not to determine whether SIdr can indeed contribute to solving the Hubble tension. We find that SIdr alone can increase the Hubble constant () to
with a value of
. However, including FSdr disfavors the existence of SIdr
. Even though the Hubble constant is increased compared to the predicted value, it entails
. Finally, we implement the Fisher method for future experiments and a
measurement of
will be obtained when combing data from Planck, AliCPT, and CMB-S4.
© The Author(s) 2024
Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
Funded by SCOAP3.