CPon Dark Matter
Ferruccio Feruglio, Robert Ziegler

TL;DR
This paper explores a supersymmetric model where a light scalar field, the CPon, can serve as a viable dark matter candidate, satisfying astrophysical and experimental constraints within a specific mass range.
Contribution
It introduces the CPon as a dark matter candidate in supersymmetric models with spontaneous CP violation, analyzing its couplings, constraints, and production mechanisms.
Findings
CPon mass range between 10 meV and 1 MeV.
CPon can account for dark matter via misalignment and freeze-in production.
Couplings suppressed by UV scale > 10^{12} GeV.
Abstract
We study a class of supersymmetric models where the strong CP problem is solved through spontaneous CP violation, carried out by a complex scalar field that determines the Yukawa couplings of the theory. Assuming that one real component of this field - the CPon - is light, we examine the conditions under which it provides a viable Dark Matter candidate. The CPon couplings to fermions are largely determined by the field-dependent Yukawa interactions, and induce couplings to gauge bosons at 1-loop. All couplings are suppressed by an undetermined UV scale, which needs to exceed GeV in order to satisfy constraints on excessive stellar cooling and rare kaon decays. The CPon mass is limited from below by 5th force experiments and from above by X-ray telescopes looking for CPon decays to photons, leaving a range roughly between 10 meV and 1 MeV. Everywhere in the allowed parameter…
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Taxonomy
TopicsDark Matter and Cosmic Phenomena · Atomic and Subatomic Physics Research · Radioactive Decay and Measurement Techniques
