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arXiv · 2603.25712

Nonlocal Portal to the Dark Sector

Sergey Kovalenko·Sergey Kuleshov·Valery E. Lyubovitskij·Alexey S. Zhevlakov
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Abstract

We propose a nonlocal realization of the Stueckelberg portal between the Standard Model and Dark Sector, which decouple in the local limit. This implies that the mediator, $U(1)_{D}$ Dark Photon $A'$ with a Stueckelberg mass, interacts nonlocally with the Standard Model quarks and leptons. We study phenomenological implications of this scenario for the meson decays into semi-invisible and invisible channels. We discuss the experimental limitations on the model parameters, including the nonlocality scale.

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Sergey Kovalenko, Sergey Kuleshov, Valery E. Lyubovitskij, Alexey S. Zhevlakov. 2026-03-26. Nonlocal Portal to the Dark Sector. https://doi.org/10.1103/xqyc-6vgs

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