The Heavy Quanta Theory of Nuclear and Cosmic Ray Phenomena

摘要: In 1935 Yukawa suggested in a paper the Proceedings of Physico-Mathematical Society Japan 1) that exchange forces between heavy particles (protons and neutrons) must be attributed to action an intervening field and, particular, may regarded as second order effect due consecutive emission absorption charged “heavy quanta”, just electromagnetic interaction two can described by quantized field. explain range about 2 × 10−13 cm nuclear forces, he assumed this quantum had mass 200 times large electron mass: m ≈ m. his original theory was tentatively scalar Then, however, it turned out 2) that, if energy quanta positive, force proton neutron became repulsive 3S state, contradiction fact is ground state deuteron. Since mean time experiments on cosmic ray phenomena 3) 4) 5) 6) existence particle having magnitude m, which might identified with Yukaw a’s 7), expressed intention investigate whether difficulty sign proton-neutron could removed introducing non-scalar 2).