|
The neutrino theory of light is the proposal that the photon is a composite particle formed of a neutrino–antineutrino pair. It is based on the idea that emission and absorption of a photon corresponds to the creation and annihilation of a particle–antiparticle pair. The neutrino theory of light is not currently accepted as part of mainstream physics, as according to the standard model the photon is an elementary particle, a gauge boson. == History == In the past, many particles that were once thought to be elementary such as protons, neutrons, pions, and kaons have turned out to be composite particles. In 1932, Louis de Broglie〔 〕〔 〕 suggested that the photon might be the combination of a neutrino and an antineutrino. During the 1930s there was great interest in the neutrino theory of light and Pascual Jordan,〔 〕 Ralph Kronig, Max Born, and others worked on the theory. In 1938, Maurice Henry Lecorney Pryce〔 〕 brought work on the composite photon theory to halt. He showed that the conditions imposed by Bose–Einstein commutation relations for the composite photon and the connection between its spin and polarization were incompatible. Pryce also pointed out other possible problems, “In so far as the failure of the theory can be traced to any one cause it is fair to say that it lies in the fact that light waves are polarized transversely while neutrino ‘waves’ are polarized longitudinally,” and lack of rotational invariance. In 1966, V S Berezinskii〔 *translated in ''Soviet Physics JETP'', 24: 927 (1967)〕 reanalyzed Pryce’s paper, giving a clearer picture of the problem that Pryce uncovered. Starting in the 1960s work on the neutrino theory of light resumed, and there continues to be some interest in recent years.〔 〕〔 〕〔 〕〔 〕 Attempts have been made to solve the problem pointed out by Pryce, known as Pryce’s Theorem, and other problems with the composite photon theory. The incentive is seeing the natural way that many photon properties are generated from the theory and the knowledge that some problems exist〔 〕〔 〕 with the current photon model. However, there is no experimental evidence that the photon has a composite structure. Some of the problems for the neutrino theory of light are the non-existence for massless neutrinos〔 〕 with both spin parallel and antiparallel to their momentum and the fact that composite photons are not bosons. Attempts to solve some of these problems will be discussed, but the lack of massless neutrinos makes it impossible to form a massless photon with this theory. The neutrino theory of light is not considered to be part of mainstream physics. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Neutrino theory of light」の詳細全文を読む スポンサード リンク
|