Timeline for Why do physicists believe that particles are pointlike?
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| Feb 7, 2021 at 5:24 | comment | added | Edouard | For readers who are at levels of ignorance similar to my own, I'd like to point out that (per the Wiki "Angular momentum"), the Hamiltonian seems to provide an alternative to the Lagrangian, and also that string theory does, as implied by Arnold Neumaier in his answer, provide (when necessary) for particles to have spatial extent, by representation of the strings as tubes. Such representations, or those alternatives described by me in my earlier comments on the OP's question, may have more relevance to cosmology than to the subjects tagged by the OP, whose question's at PSE's 5-tag limit. | |
| Oct 25, 2012 at 16:02 | history | answered | Arnold Neumaier | CC BY-SA 3.0 |