Why do two particles hold themselves together in a vacuum?

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SUMMARY

The discussion centers on the forces that enable two particles to hold together in a vacuum. It is established that if the particles are charged, the electromagnetic force is responsible for their attraction. In the case of nucleons, the strong force plays a crucial role in their cohesion. However, non-charged particles, such as dust, do not exhibit this behavior and remain together only by chance.

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  • Understanding of electromagnetic force
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  • Basic principles of vacuum conditions
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BrettS
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So, I've been wondering about this lately and wanted to know if anyone could provide me with a straightforward answer on what the theory behind this phenomenon currently is?
 
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You need to give more context. If they are charged, then the electromagnetic force comes into play. If they are nucleons, then (depending on details) the strong force will be applicable. If they are just pieces of dust, they probably won't stay together, except by coincidence.
 

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