# A New Property of the Electromagnetic/Yang-Mills-Conformal Gravity System in Spherical Symmetry

## TL;DR

This paper uncovers a new property of conformal gravity where electromagnetic and Yang-Mills charges can vary under partial conformal transformations, revealing novel charge behaviors and solutions in spherical symmetry.

## Contribution

It introduces the concept that charges in conformal gravity can vanish or emerge through partial conformal transformations, including a new SU(2) charged black hole solution.

## Key findings

- Electromagnetic charge varies with partial conformal transformations.
- SU(2) charge exhibits similar properties to magnetic charges.
- Possible extension of these properties to Einstein gravity is discussed.

## Abstract

We find a new property in $W^2$-conformal gravity in spherical symmetry. We demonstrate that the charge of the electromagnetic field varies with respect to the partial scaling symmetry (conformal transformations in subspaces of a spacetime) in the conformal gravity. We find that the electric and magnetic charges can vanish or appear via partial conformal transformations for the on-shell configurations in the conformal gravity. We find a solution of a Yang-Mills SU(2)-charged black hole in the conformal gravity, and further demonstrate that the SU(2) charge has similar properties with electromagnetic magnetic charges in the conformal gravity. We demonstrate how to imbed the electromagnetic and Yang-Mills SU(2) gauge field into the conformal gravity via such a symmetry. We make a brief discussion about the possibility to extend this argument to the Einstein gravity.