Do We Live in an Antigravity Universe?
Scott Menary

TL;DR
This paper explores a cosmological model where matter and antimatter repel gravitationally, leading to a universe with distinct properties such as fewer antistars, different expansion rates, and phenomena resembling MOND galaxy rotation curves.
Contribution
It introduces a novel antigravity universe model based on matter-antimatter gravitational repulsion and examines its consistency with cosmological observations.
Findings
Potential compatibility with ΛCDM parameters
Distinct cosmic acceleration and expansion features
Phenomenology including galaxy rotation and voids
Abstract
In arXiv:2401.10954 I showed that, in the context of antigravity (i.e., matter and antimatter repel gravitationally), quark/lepton mass-energy is matter and antiquark/antilepton mass-energy is antimatter while the mass-energy of the intermediate vector bosons (e.g., the photon and ) also has to be considered matter. One consequence of this is that the antiproton (and, hence, the antineutron) is dominantly composed of matter since some two-thirds of its mass is gluonic. Under this premise I found that the gravitational acceleration of antihydrogen would be . This is to be compared to the ALPHA-g result of . In this article I explore the cosmological implications of this definition of matter and antimatter. This leads to a quite different antigravity universe than previous…
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Taxonomy
TopicsCosmology and Gravitation Theories · Space Science and Extraterrestrial Life · History and Developments in Astronomy
