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The data on scattering of hard real photons on nucleons show that in these
cases protons and neutrons yield very similar results. This property
cannot be explained as an interaction of a real photon with
electrically charged
constituents of the nucleons.
This property of real photons is explained automatically by the regular monopole
theory. Indeed, a real photon is the quantum form of free
electromagnetic waves
and, due to the
main conclusions of the regular monopole theory
it interacts with
monopoles. Now, according to the third
postulate.
quark constituents of a
proton and those of
a neutron have the same monopole structure.
Moreover, according to the fourth
postulate.
the size of the elementary magnetic charge is much greater than
that of the corresponding electric
charge. Hence, the scattering process of a real photon on nucleons
is dominated by the quarks' magnetic charge and the difference between their
electric charge is no more than a small
perturbation. Therefore, the
main conclusions of the regular monopole theory
explain the data.
On the other hand, QCD has no direct explanation for this effect,
because in
the Yang-Mills terminology electrodynamics is a U(1) theory whereas QCD is
an SU(3)
theory. Therefore, at present an explanation of the effect discussed
here relies on an idea called Vector Meson Dominance (VMD). Now, VMD is
regarded as a phenomenological idea and, as such, it cannot provide a basis
for a theoretical explanation of the effect. Moreover, it has recently been
proved that VMD contradicts well established theoretical elements, like
special relativity and angular momentum conservation. For example,
it is inconsistent with Wigner's analysis of the Poincare group.
For more details
about this issue,
click here.
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