Event shape observables

In high energy physics, event shapes observables are quantities used to characterize the geometry of the outcome of a collision between high energy particles in a collider. Specifically, event shapes observables quantify the general pattern traced by the trajectories of the particles resulting from the collision.

The most common event shape observables include:

  • The sphericity;
  • The aplanarity;
  • The C-parameter;
  • The jet broadening.
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