Jeans instability and anti-screening in gravitational-antigravitational model of Universe

TL;DR

This paper explores a gravitational-antigravitational model of the Universe, proposing that antigravitational interactions could explain matter-antimatter separation, cosmic acceleration, and the Universe's flatness through modified Jeans instability and antiscreening effects.

Contribution

It introduces a two-component hydrodynamic model with gravitational repulsion and attraction, highlighting the role of antigravity in cosmic structure and expansion.

Findings

Increased Jeans instability rate due to antigravity.

Presence of antiscreening effects in the model.

Potential explanation for matter-antimatter separation and accelerated expansion.

Abstract

The hypothesis of antigravitational interaction of elementary particles and antiparticles is considered on the basis of the simple two-component hydrodynamic model with gravitational repulsion and attraction. It is shown increasing of the Jeans instability rate, the presence of antiscreening and the dominative role of the gravitational repulsion as a possible mechanism for spatial separation of matter and antimatter in Universe, as well as the observable acceleration of the far galaxies. The sound wave is found for the two-component gravitational-antigravitational system, which starts for k = 0 in the case of annihilation neglecting. The suggested approach permits to reestablish the idea about baryon symmetry of Universe, causing its steady flatness of the large scale and accelerated Universe expansion.