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.[1][2]
The most common event shape observables include:
The sphericity;
The aplanarity;
The thrust.
The C-parameter;
The jet broadening.
^V. D. Barger, R. J. N. Phillips (1997) “Collider Physics” Frontier in Physics, Addison-Wesley Publishing Company, Inc.
^M. Dasgupta and G. P. Salam (2004),
Event shapes in e+ e- annihilation and deep inelastic scattering,
J. Phys. G 30, R143, preprint
and 27 Related for: Event shape observables information
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