http://www.cbsnews.com/news/has-a-new-fifth-force-of-nature-been-found/
The new work by Feng and his team suggests that the Hungarians found not a "dark photon" but rather a "protophobic X boson" -- a strange particle whose existence could indicate a fifth force of nature. The known electromagnetic force acts on protons and electrons, but this newfound particle apparently interacts only with protons and neutrons, and then only at very short distances, researchers said.
The new work by Feng and his team suggests that the Hungarians found not a "dark photon" but rather a "protophobic X boson" -- a strange particle whose existence could indicate a fifth force of nature. The known electromagnetic force acts on protons and electrons, but this newfound particle apparently interacts only with protons and neutrons, and then only at very short distances, researchers said.
