Consider a single particle production process \[ A + B \longrightarrow A + B + C.\] How many independent Lorentz invariant (Lorentz scalars) kinemtaic variables can be written down in terms of the four momenta of the particles, after taking into account of energy momentum and mass constraints.
Generalize the above result when there are \(n\) particles in the final state. Does your number give all possible Lorentz invariants?
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4727: Diamond Point