libcojets2-gfortran binary package in Ubuntu Focal amd64

 COJETS is a Monte Carlo library which simulates pbar-p and p-p interactions at
 high energy. The interaction process is first calculated at the parton level
 by means of perturbative QCD and the Weinberg-Salam model for electroweak
 interactions. Partons are then independently fragmented into jets of hadrons,
 according to the Field-Feynman model, and the beam jets contribution is
 added, according to a longitudinal phase-space model. Multiple QCD radiation
 of initial and final partons is included.
 .
 Note that in order to compile and link programs against this library, you
 must also install the libcojets2-dev package.

Source package