Zero dimensional point particles?

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Elementary particles like electrons and quarks are classified as zero-dimensional, implying they have no size. This raises questions about whether they could possess a size too small to detect, which would suggest an internal structure. Current models assert that these particles lack such structure, maintaining their zero-dimensional classification. If particles were to have a non-zero size, it would complicate the transmission of signals and challenge existing physical theories. The discussion highlights the tension between theoretical models and the implications of potential particle size.
ajv
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All elementary particles, which are not made up by any other particles (electrons, quarks), are said to be zero dimensional and have no size. But why not? Are electrons literally zero dimensional particles with no size?
 
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ajv said:
All elementary particles, which are not made up by any other particles (electrons, quarks), are said to be zero dimensional and have no size. But why not? Are electrons literally zero dimensional particles with no size?
Can't point particles have size that is just too small to see?
 
If they have size then they must have internal structure. Our current models say they don't.
If they are of non-zero diameter, then it takes a non-zero duration for a signal to pass from one side to the other, and that would mess up our current understanding physics.
 

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