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Microscopic composite systems bound by strong gravity in extra dimensions as candidates for dark matter

V. V. Flambaum

Phys. Rev. D 112, 015003 – Published 2 July, 2025

DOI: https://doi.org/10.1103/vx1p-px7g

Abstract

In the Arkani-Hamed-Dimopoulos-Dvali (ADD) model with n extra compactified dimensions, the gravitational potential scales as 1/rn+1 and becomes significantly stronger at short distances. We investigate the possibility of forming small-sized composite systems of Standard Model particles bound by this potential. Such bound states, composed of quarks, neutrinos, axions or other particles, exhibit a small cross-section-to-mass ratio, making them viable candidates for dark matter.

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