According to our current understanding of physics, photons are considered stable particles and do not decay. Photons are elementary particles and the carriers of electromagnetic radiation, such as light. They do not possess an electric charge and have a rest mass of zero.
While photons do not undergo decay, they can interact with other particles and be absorbed or scattered, changing their direction or energy. For example, when a photon interacts with an electron, it can be absorbed, and the electron may transition to a higher energy state. This process is known as the photoelectric effect. Similarly, photons can be scattered off charged particles through processes like Compton scattering.
However, it's important to note that scientific understanding is always evolving, and new discoveries or theories may arise that could challenge or expand our current knowledge. So, while photon decay is not currently supported by our understanding of physics, future research could potentially reveal new insights.