bullet : Continuous Collision Detection and Physics Library ( http://www.bulletphysics.com/ )
cernlib : CERN program library for High Energy Physics ( https://cernlib.web.cern.ch/cernlib/ )
cernlib-montecarlo : Monte-carlo library and tools for the cernlib ( https://cernlib.web.cern.ch/cernlib/ )
espresso : Extensible Simulation Package for Research on Soft matter ( http://espressomd.org )
espresso++ : extensible, flexible, fast and parallel simulation software for soft matter research ( https://www.espresso-pp.de )
fastjet : Fast implementation of several recombination jet algorithms ( http://www.fastjet.fr/" SRC_URI="${HOMEPAGE}/repo/${P}.tar.gz )
geant : Toolkit for simulation of passage of particles through matter ( http://geant4.cern.ch/ )
geant-data : Data files for Geant4 physical processes ( http://geant4.cern.ch/ )
geant-python : Python bindings for Geant4 ( http://geant4.cern.ch/ )
h2o-gtk : GTK+ UI for libh2o -- water and steam properties ( https://bitbucket.org/mgorny/h2o-gtk/ )
harminv : Extraction of complex frequencies and amplitudes from time series ( http://ab-initio.mit.edu/harminv/ )
hepmc : Event Record for Monte Carlo Generators ( http://lcgapp.cern.ch/project/simu/HepMC/ )
heppdt : Data about each particle from the Review of Particle Properties ( http://lcgapp.cern.ch/project/simu/HepPDT/" SRC_URI="${HOMEPAGE}/download/${MYP}.tar.gz )
herwig : High Energy Physics Event Generator ( http://www.hep.phy.cam.ac.uk/theory/webber/Herwig/" ${HOMEPAGE}/${MY_P}.f ${HOMEPAGE}/${MY_P}.inc ${HOMEPAGE}/${MY_PINC} doc? ( ${HOMEPAGE}/hw65_manual.pdf ) )
herwig++ : High-Energy Physics event generator ( http://herwig.hepforge.org/ )
hoomd-blue : a general-purpose particle simulation toolkit ( http://codeblue.umich.edu/hoomd-blue/ )
jaxodraw : Java program for drawing Feynman diagrams ( http://jaxodraw.sourceforge.net/ )
lammps : Large-scale Atomic/Molecular Massively Parallel Simulator ( http://lammps.sandia.gov/ )
lhapdf : Les Houches Parton Density Function unified library ( http://lhapdf.hepforge.org/ )
lightspeed : OpenGL interactive relativistic simulator ( http://lightspeed.sourceforge.net/ )
looptools : Tools for evaluation of scalar and tensor one-loop integrals ( http://www.feynarts.de/looptools )
meep : Simulation software to model electromagnetic systems ( http://ab-initio.mit.edu/meep/ )
mpb : Photonic band structure program ( http://ab-initio.mit.edu/mpb/ )
paw : CERN's Physics Analysis Workstation data analysis program ( https://paw.web.cern.ch/paw/ )
pythia : Lund Monte Carlo high-energy physics event generator ( http://pythia8.hepforge.org/ )
reduze : Program for reducing Feynman integrals ( http://reduze.hepforge.org/ )
rivet : Toolkit for validation of Monte Carlo HEP event generators ( http://rivet.hepforge.org/ )
root : C++ data analysis framework and interpreter from CERN ( http://root.cern.ch/ )
sassena : Software for Calculating Scattering Diagrams on Massively Parallel Computers ( http://www.sassena.org )
siscone : Hadron Seedless Infrared-Safe Cone jet algorithm ( http://siscone.hepforge.org/ )
thepeg : Toolkit for High Energy Physics Event Generation ( http://home.thep.lu.se/ThePEG/ )
xfoil : Design and analysis of subsonic isolated airfoils ( http://raphael.mit.edu/xfoil/ )
yoda : Yet more Objects for (High Energy Physics) Data Analysis ( http://yoda.hepforge.org/ )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a gentoo
For Paludis use this rsync : rsync://gentoo.zugaina.org/gentoo-portage
If you have a problem : ycarus(-at-)zugaina.org