Wednesday, 7 February 2018

quantum field theory - Why do physicists believe that particles are pointlike?


String theory gives physicists reason to believe that particles are 1-dimensional strings because the theory has a purpose - unifying gravity with the gauge theories.


So why is it that it's popular belief that particles are 0-dimensional points? Was there ever a proposed theory of them being like this? And why?


What reason do physicists have to believe that particles are 0-dimensional points as opposed to 1-dimensional strings?





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