Thursday, May 14, 2015

charge - Why are there no elementary charged, spin-zero particles?


In the spirit of a related inquiry, I would like to know if there's a basis for understanding why there aren't any elementary particles that have non-zero electric charge but zero spin?


Can such a quantum theory be written down and self-consistent? Do the current symmetries of our present QFTs not allow such a particle?




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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 \...