Internal massless components of these objects are associated with a factor proportional to i divided by the momentum q squared, while coupling constants equal to the square root of 4 pi times the fine structure constant are introduced for each of these objects' vertices. Processes are called OZI suppressed and have much shorter lifetimes if these objects can be "cut" by touching only gluons. Antisymmetrization results in subtraction between matrix elements when two of these objects differ by the exchange of identical fermions. Arrows moving opposite the direction of time in these objects repre
Internal massless components of these objects are associated with a factor proportional to i divided by the momentum q squared, while coupling constants equal to the square root of 4 pi times the fine structure constant are introduced for each of these objects' vertices. Processes are called OZI suppressed and have much shorter lifetimes if these objects can be "cut" by touching only gluons. Antisymmetrization results in subtraction between matrix elements when two of these objects differ by the exchange of identical fermions. Arrows moving opposite the direction of time in these objects represent antiparticles, while helices denote gluons and waves indicate photons. For 10 points, name these diagrams used to model particle interactions, named for a Caltech physicist.