Elastic positivity from a modified forward dispersion relation constrains the twelve dim-8 Wilson coefficients of the photon–dark-photon EFT to a spectrahedral cone, with hierarchies for non-forward mixed amplitudes and distinct loci for kinetic-mixing and dark-axion UV completions.
Portal Connecting Dark Photons and Axions
4 Pith papers cite this work. Polarity classification is still indexing.
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abstract
The dark photon and the axion (or axion-like particle) are popular light particles of the hidden sector. Each of them has been actively searched for through the couplings called the vector portal and the axion portal. We introduce a new portal connecting the dark photon and the axion (axion--photon--dark photon, axion--dark photon--dark photon), which emerges in the presence of the two particles. This dark axion portal is genuinely new couplings, not just from a product of the vector portal and the axion portal, because of the internal structure of these couplings. We present a simple model that realizes the dark axion portal and discuss why it warrants a rich phenomenology.
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hep-ph 4years
2026 4roles
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background 2representative citing papers
A proposed Chinese charm factory could detect heavy neutral leptons from axionlike-particle decays with a displaced-vertex search, reaching electron-neutrino mixing one to two orders of magnitude below current bounds.
In a vector dark matter extension of the Higgs portal, far detectors at colliders can probe otherwise inaccessible parameter space and set novel bounds on the reheating temperature.
Monte Carlo studies show BESIII data already reaches previously unexplored regions of the dark axion portal via J/ψ → a γ' decays, with STCF projected to improve sensitivity by about an order of magnitude.
citing papers explorer
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The Positivity Geometry of Photon--Dark-Photon Effective Field Theories
Elastic positivity from a modified forward dispersion relation constrains the twelve dim-8 Wilson coefficients of the photon–dark-photon EFT to a spectrahedral cone, with hierarchies for non-forward mixed amplitudes and distinct loci for kinetic-mixing and dark-axion UV completions.
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Long-lived sterile neutrinos from axionlike particles at the Super Tau-Charm Facility
A proposed Chinese charm factory could detect heavy neutral leptons from axionlike-particle decays with a displaced-vertex search, reaching electron-neutrino mixing one to two orders of magnitude below current bounds.
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Can LLP detectors probe the reheating temperature? A case study of vector dark matter
In a vector dark matter extension of the Higgs portal, far detectors at colliders can probe otherwise inaccessible parameter space and set novel bounds on the reheating temperature.
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Probing the dark axion portal via $J/\psi$ decays at BESIII and STCF
Monte Carlo studies show BESIII data already reaches previously unexplored regions of the dark axion portal via J/ψ → a γ' decays, with STCF projected to improve sensitivity by about an order of magnitude.