Photons do not interact directly with uncharged particles, which contributes to the difficulty in detecting dark matter. While neutrons are neutral, they can still interact with electromagnetic radiation due to their composite nature. The Higgs boson, although uncharged, can decay into two photons, indicating that indirect interactions are possible. This lack of direct interaction is a significant reason dark matter remains elusive.
PREREQUISITESPhysicists, astrophysicists, and students studying particle physics, particularly those interested in the properties and detection of dark matter.
That is only part of the reason. Note that even uncharged particles can interact with photons if they do so indirectly. For example the Higgs boson can decay into two photons even though it is an uncharged elementary particle. http://www.hep.lu.se/atlas/thesis/egede/thesis-node17.html.SarcasticSully said:Are photons capable of interacting with particles with no charge. And if not, is it possible that that's the reason dark matter has so far eluded detection: because it has no charge?