Thursday, May 29, 2014

particle physics - Search for WIMPs


Apparently one means of detecting WIMPs is to search for a photon ejected when one interacts with matter. If we don't know its mass or velocity and the weak interaction implies the absence of charge, why is a photon released?




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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 \...