Pairwise Distances

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Python

In Python, the Euclidean distance is supported as the ground distances between particles. The YPhi versions of the EMD and PairwiseEMD classes implement ground distances in the rapidity-azimuth plane, where the $\phi$ coordinate is periodic.

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C++

In C++, the PairwiseDistance class should be compatible with the ParticleCollection used by the Event class. It should derive from the templated PairwiseDistanceBase class, which uses the CRTP to provide static polymorphism.