Big bang nucleosynthesis constraints on the energy-momentum squared gravity: The <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mi mathvariant="double-struck">T</mml:mi><mml:mn>2</mml:mn></mml:msup></mml:math
Scale-independent energy-momentum squared gravity (EMSG) allows different gravitational couplings for different types of sources and has been proven to have interesting implications in cosmology. In this paper, the big bang nucleosynthesis (BBN) formalism and the latest observational constraints on nuclear abundances are being used to put bounds on this class of modified gravity models. Using the tight constraint from BBN on the correction term in the Friedmann equation in EMSG scenario, we report the allowed deviation from the standard cosmic expansion rate.
Authors
- Myung-Ki Cheoun (ORCID: https://orcid.org/0000-0001-7810-5134)
- Dukjae Jang (ORCID: https://orcid.org/0000-0001-7684-9519)
- Mayukh R. Gangopadhyay (ORCID: https://orcid.org/0000-0002-1466-8525)
- Toshitaka Kajino (ORCID: https://orcid.org/0000-0002-8619-359X)
- M. Sami (ORCID: https://orcid.org/0000-0003-1081-0632)
Institutions
- L. N. Gumilyov Eurasian National University (KZ)
- Soongsil University (KR)
- Chinese Academy of Sciences (CN)
- Shree Guru Gobind Singh Tricentenary University (IN)
- National Astronomical Observatory of Japan (JP)
- The University of Tokyo (JP)
- Beihang University (CN)
Publication Details
- Journal
- Physical review. D/Physical review. D.
- Published
- 2025-02-12
- DOI
- https://doi.org/10.1103/physrevd.111.043525
- Citations
- 2
- Primary Topic
- Cosmology and Gravitation Theories
- Type
- article
- Field-Weighted Citation Impact
- 2.31
Funders
- Department of Science and Technology, Ministry of Science and Technology, India
- National Natural Science Foundation of China
- National Research Foundation of Korea
- Ministry of Education and Science of the Republic of Kazakhstan
- Japan Society for the Promotion of Science
- Science and Engineering Research Board
- National Key Research and Development Program of China