# Is the electromagnetic field a source of a mediating field in hidden sector?

## TL;DR

This paper proposes a model where the electromagnetic field acts as a source for a mediating field in a hidden sector, establishing a weak coupling between visible and hidden sectors through a photonic portal.

## Contribution

It introduces a novel hidden sector model where electromagnetic fields facilitate interactions via sterile particles and mediators, highlighting a new role for electromagnetism in the Universe's structure.

## Key findings

- Electromagnetic field can source a mediating boson in the hidden sector.
- A spontaneous symmetry breaking mechanism links electromagnetism to hidden interactions.
- The model suggests a weak coupling between visible and hidden sectors via a photonic portal.

## Abstract

We continue the discussion of a proposed model of hidden sector of the Universe, consisting of sterile spin-1/2 Dirac fermions ("sterinos"), sterile spin-0 bosons ("sterons") with spontaneously nonzero vacuum expectation value, and sterile nongauge mediating bosons ("A bosons") described by an antisymmetric-tensor field (of dimension one). The Standard-Model electromagnetic field (of dimension two) multiplied by the steron vacuum expectation value becomes in a spontaneous way a source of A-boson field mediating new weak interactions in hidden sector and providing - due to the action of electromagnetic field in both sectors - a weak coupling between hidden and Standard-Model sectors ("photonic portal"). The proposed photonic portal emphasizes even more the role of electromagnetic field in the structure of the Universe.