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For example, we have quark models, shell models, cluster models, etc. which seem to admit to different interpretations regarding nuclear structure and dynamics. Is there a way to resolve the fact that they're somewhat incompatible?

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  • $\begingroup$ Can you elaborate more on your question, I think it's too vague. Can you say exactly which assumptions are needed to reconcile? $\endgroup$ – Ismasou Jul 30 '19 at 9:29
  • $\begingroup$ Sure, as one example, the liquid drop model paints a classical fluid picture while others present a shell structure with distinct energy levels and pointlike nucleons. We can do away with a lot of this stuff by just noting that we're making certain choices when approximating the system, overcoming how intractable QCD can be, etc. But there still seems to be some sort of problem when the models contradict and make it hard to extract a unified picture of what nuclear structure looks like, what is true of it, how we should conceptualize it, etc. Does that make at least a little sense? $\endgroup$ – Hanguk Jul 30 '19 at 9:42
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    $\begingroup$ The examples you're describing aren't really models of QCD. These are models of nuclear physics, and the models may or may not actually be based on QCD itself. $\endgroup$ – probably_someone Jul 30 '19 at 9:57
  • $\begingroup$ We can just leave out the "in QCD" part then? $\endgroup$ – Hanguk Jul 30 '19 at 10:06
  • $\begingroup$ You'd probably be better off deleting this question and writing a new one that's specific to nuclear models. Again, however, asking about reconciling differences between multiple different nuclear models will be too broad (IMO). Different odels are "tailored" to focus on different properties, and the only way they'd agree would be if they were (effectively) the same model. A "pure" QCD model in all it's glory would be too complex to extract useful info from. $\endgroup$ – StephenG Jul 30 '19 at 10:24

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