The dilaton as a candidate for dark matter

1996/09/25 by Rainer Dick, Dick, Rainer
Physics and Astronomy · #Astrophysics (astro-ph) #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #FOS: Physical sciences #High Energy Physics - Theory (hep-th) #Scientific Research and Discoveries

paper · pdf · doi:10.48550/arxiv.hep-th/9609190

openalex publication_date 1996/09/25 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We examine consequences of the stabilization of the dilaton through the axion. An estimate of the resulting dilaton potential yields a relation between the axion parameter m_a f_PQ and the average instanton radius, and predicts the ratio between the dilaton mass m_ϕ and the axion mass m_a. If we identify the string axion with a Peccei--Quinn axion, then m_ϕm_Pl ∼ m_a f_PQ, and the dilaton should be strongly aligned √()≤ 10^-4m_Pl at the QCD scale, in order not to overclose the universe.

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