English

Dark Universe Phenomenology from Yukawa Potential?

General Relativity and Quantum Cosmology 2024-08-22 v3 High Energy Physics - Phenomenology High Energy Physics - Theory

Abstract

We argue that the effect of cold dark matter in the cosmological setup can be explained by the coupling between the baryonic matter particles in terms of the long-range force having a graviton mass mgm_g via the Yukawa gravitational potential. Such a quantum-corrected Yukawa-like gravitational potential is characterized by the coupling parameter α\alpha, the wavelength parameter λ\lambda, which is related to the graviton mass via mg=/(λc)m_g=\hbar/(\lambda c), that determines the range of the force and, finally, a Planck length quantity l0l_0 that makes the potential regular at the centre. The corrected Friedmann equations are obtained using Verlinde's entropic force interpretation of gravity based on the holographic scenario and the equipartition law of energy. The parameter α\alpha modifies Newton's constant as GeffG(1+α)G_{\rm eff}\rightarrow G(1+\alpha). We argue that dark matter is an apparent effect as no dark matter particle exists in this picture. Furthermore, the dark energy is also related to graviton mass and α\alpha; in particular, we point out that the cosmological constant can be viewed as a self-interaction effect between gravitons. We further show that there exists a precise correspondence with Verlinde's emergent gravity theory, and due to the long-range force, the theory can be viewed as a non-local gravity theory. To this end, we performed the phase space analyses and estimated λ103\lambda\simeq 10^3 [Mpc] and α(0.0385,0.0450)\alpha \in (0.0385,0.0450), respectively. Finally, from these values, for the graviton mass, we get mg1068m_g\simeq 10^{-68} kg, and cosmological constant Λ1052m2\Lambda \simeq 10^{-52}\rm m^{-2}. Further, we argue how this theory reproduces the MOND phenomenology on galactic scales via the acceleration of Milgrom a01010m/s2a_0 \simeq 10^{-10}\rm m/s^2.

Keywords

Cite

@article{arxiv.2304.11492,
  title  = {Dark Universe Phenomenology from Yukawa Potential?},
  author = {Kimet Jusufi and Genly Leon and Alfredo D. Millano},
  journal= {arXiv preprint arXiv:2304.11492},
  year   = {2024}
}

Comments

13 pages, 4 figures, final version