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Background

Same electric charges always repel each other, without exception. Opposite charges always attract.

An atomic nucleus with multiple positive charges must therefore generate tremendous forces to blow it apart. But many atomic nuclei are stable and can survive for decades or even billions of years without blowing apart.

Therefore there must be a more-powerful attractive force that holds them together in opposition to this repulsion.

This logic is ironclad and there cannot be any other way to look at it. The nature of this force was theorized to come from meson exchange. Then there were theories that attribute it to something separate from electric charge. It became convenient to imagine eight different color charges, and many complications were built which allow the theory to fit a great deal of experimental data. There is no possible alternative approach.

Or is there? Could there be another way to hold a nucleus together, that would involve different starting assumptions, that has not yet been disproven? Have there been other approaches which have been disproven?

Here's the sort of thing I'd be interested in

I make no claim that any model along these lines would work, but I could imagine that something vaguely like this might work.

Imagine that sometimes when a neutron and a proton are very close, they behave like two protons with a negative charge halfway between them. Then both of them are attracted to the negative charge four times as much as either of them is repelled by the other. So there is reason for deuterium to stay together.

Imagine that an alpha particle consists of four positive charges and two negative charges. The positive charges could form a square, with the negative charges above and below the center of the square. At some perpendicular distance for the negative charges, all six would be attracted more than repelled.

Each alpha particle might bind to other alpha particles -- a positive charge from one might be close to a negative charge from another. They might build like crystals.

A low-energy nucleus might be very much like an ionic crystal, and each component would have characteristic vibrations. Given higher energy inputs, a nucleus might split along cleavage planes, or start to "melt".

It would be interesting to do without the theorized strong force. But we would still need something more than simple electric charge. Large crystals depend on atoms to have excluded volume. Their attractive forces can't simply pull them together into a point. Protons would need a way to keep them from overlapping even when the forces that pull them together are always stronger than their charge repulsion.

Links

electromagnetic or gravitational spin might create strong force

Pairs of spinning charges create standing waves that hold them together

Color theory fits the known data so it is correct

Gluon theory proves that nucleons cannot ever form crystal structures

Pomerons, string theory

The Bottom Line

Again, I do not claim that any model along these lines could fit the observed data about atomic nuclei. Nor do I claim that it can't. I have not noticed any alternative to the theoretical strong force that's easier to understand, and I want to hear about any alternatives.

Qmechanic
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J Thomas
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1 Answers1

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Sadly, the universe is under no obligation to be understandable to the humans who happen to inhabit it. This means for nonexperts like you and me, there is no way to grasp the dynamics of the strong force intuitively and on our own. The best we can do is to rely on the experts here to put the hay down close enough to the ground where the horses like us can get at it.

It is possible, of course, for nonexperts to invent their own models of the strong force as you are attempting to do, but since such models are nonmathematical, there is no way they can help anyone make sense of things like scattering cross-sections, mean lifetimes, energy conservation, and so on. And that means that the experts in the field, who have spent their careers working on these problems, are not under any obligation to take those models or the people proposing them seriously.

Bear in mind that while the particle accelerator data on what's inside a proton and what holds it together was accumulating in the late 1960's, there was an army of physicists proliferating their own unique models based on that data. As more and more data came in, the number of models which could successfully account for that data (and make testable predictions about what the next batch of data would look like) grew smaller and smaller- like boiling the slag out of ore- until the quark picture (the remaining nugget of gold) was the only viable model left. So, your process of postulating alternative models and seeing where they take us has already happened some 50 years ago.

niels nielsen
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