Friday, April 7, 2017

quantum field theory - Why do physicists say that elementary particles are point particles?


For example, an electron, it has mass and charge, but is considered to have point mass and point charge, but why? Why are they assumed to have charge and mass in a single infinitely small point in space? Doesn't QFT show us that point like particles aren't really points rather extended excitations of fields?




No comments:

Post a Comment

classical mechanics - Moment of a force about a given axis (Torque) - Scalar or vectorial?

I am studying Statics and saw that: The moment of a force about a given axis (or Torque) is defined by the equation: $M_X = (\vec r \times \...