41. Theory of weak interactions has been tested and found correct to a few parts in a thousand. 42. The weak interaction is unique in that it allows for quarks to swap their flavour for another. 43. More helpfully, and in general, where can I find Feynman diagrams for these fairly straightforward weak interactions ? 44. It is another, extended quantum field theory which unifies the electromagnetic and weak interactions into one theory. 45. The bottom quark can decay into either an up quark or charm quark via the weak interaction . 46. But this is a weak interaction . 47. This property is what is meant by the " maximal violation " of C-symmetry in the weak interaction . 48. See weak interaction for lots more. 49. As it turns out, the weak interaction is transmitted by very heavy particles called the W and Z. 50. Weak interaction among the inhomogeneous charged energy states on the surface has been hypothesized to form a band structure.