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Imagine you have electron and positron (leptons) falling towards each other. The interaction between these two is electromagnetic at long distances. It is well established that this reaction eventually leads to annihilation of these two particles. Now consider electron and proton(hadron) falling towards each other. Now, the interaction between these two is again electromagnetic at long distances. However, this process does not lead to annhilation, but a stable compound is formed instead (Hydrogen).
Which force (in the framework of the standard model) is responsible for the difference between these two cases ?
thanks
Which force (in the framework of the standard model) is responsible for the difference between these two cases ?
thanks