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This PR adds a variant of the HH model with support for the VHH process. The overall rate is now composed of r * [GGF + VBF + VHH]
with a corresponding rate parameter r_vhh
to control the standalone rate of VHH. The additions to the model are mostly a copy of what is already there for VBF with a few things left to do:
C3
to kl
to be fully consistent with the GGF and VBF samples.r_vhh
parameter.When merged, the new model should perhaps live next to the existing one to avoid interference with the current GGF+VBF combination efforts. In the long term, this combined model might be favorable though.