Think the Maxwell's equations.
Assume here a big assumption that a neutron has a pure imaginary electric charge.
From the Maxwell's equations, it can be anticipated that such a neutron produces pure imaginary electromagnetic fields around itself.
The present electromagnetism teaches us that the energy of an electromagnetic field is given by the sum of E^2+B^2.
So that for the pure imagenary electromagnetic fields, the energy becomes negative.
On the other hand, protons each of which has pure real electric charge repel each other.
This repulsion can be considered as a result of Maxwell's stress, which in turn, can be related to the electromagnetic energy around the protons. This energy is positive since the proton's electric charge is pure real.
If we combine appropriate numbers of protons and neutrons, then the proton's repulsive stress energy might be cancelled out because proton's energy and neutron's energy counteract as shown in the above equations (1) and (2). As a result each proton does not exert repulsive force on each other anymore. Therefore elemental nucleus can continue to exist stably only if an appropriate number of neutrons participate to constitute the nucleus.
How do you like this idea?
A Physical Dreamer
June 13, 2012