Calculation of flavour physics observables and relic density
SuperIso Relic is a mixed C - Fortran code which computes the dark matter relic density in the MSSM and NMSSM. SuperIso Relic is an extension of SuperIso and therefore gives access to many flavour observables at the same time.
The computation of the relic density requires the calculation of thousands of annihilation and coannihilation Feynman diagrams. In SuperIso Relic, all these diagrams have been analytically computed at tree level using FeynArts/FormCalc. They are then calculated numerically during execution. The widths of the Higgs bosons are also computed using FeynHiggs or Hdecay. The necessary libraries are included in the SuperIso Relic packages.
From the cosmological point of view, SuperIso Relic performs the relic density calculation in the cosmological standard model, but also offers the possibility to alter the equation of state of radiation using one of the five models of M. Hindmarsh and O. Philipsen, Phys. Rev. D 71 (2005), 087302 (example provided in test_modeleff.c), or to modify the density and entropy content of the pre-BBN Universe featuring the parametrization of A. Arbey and F. Mahmoudi, Phys. Lett. B 669 (2008), 46 (examples provided in test_standmod.c and test_reheating.c). BBN constraints to check the validity of the altered model are automatically computed using the AlterBBN code included in the package.
Due to the large number of Feynman diagrams involved in the relic density calculation, two versions of SuperIso Relic are offered in the same package:
- a statically-linked version, fast during execution, but slow during compilation (one or two hours needed for compilation). This version is especially useful when performing scans over supersymmetric parameter spaces, which require fast execution.
- a dynamically-linked (shared) version, which is first compiled with a minimal number of libraries, and which will compile only the necessary libraries during the execution. This version is slower during execution than the static version, but enables however a faster start. It is recommended to those who would like to use SuperIso Relic without waiting too long during the compilation process.