物质为何重要

Views Columnist What matters for matter The standard model of physics is one of the most successful scientific theories we have, but could we eliminate any particles from it, asks Chanda Prescod-Weinstein HAVE you ever wondered whether we strictly need all of the particles in the standard model of particle physics? If I were making a fundamental particle ingredients list for the most common forms of visible matter in the universe, I’d say we primarily need electrons, up quarks and down quarks. But this list ignores important elements of how matter works: how it sticks together, what happens when it gains or loses energy and whether particle identities are stable. …