micrOMEGAs for dark matter studies
Published June 16, 2025 | Version v9
Software Open

micrOMEGAs 6

Creators

  • 1. Laboratoire de Physique Subatomique et de Cosmologie
  • 2. ROR icon Laboratoire d'Annecy-le-Vieux de Physique Théorique
  • 3. IPPP, Physics Department, Durham University
  • 4. ROR icon Laboratoire de Physique Corpusculaire
  • 5. Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State Universit
  • 6. ROR icon University of Southampton

Description

micrOMEGAs is a numerical code to compute dark matter (DM) observables in generic extensions of the Standard Model of particle physics. This new version, micrOMEGAs 6.0, includes a generalization of the Boltzmann equations governing the DM cosmic abundance evolution which can be solved to compute the relic density of N-component DM. The direct and indirect detection rates in such scenarios take into account the relative contribution of each component such that constraints on the combined signal of all DM components can be imposed. The co-scattering mechanism for DM production is also included, whereas the routines used to compute the relic density of feebly interacting particles have been improved in order to take into account the effect of thermal masses of t-channel particles. Finally, the tables for the DM self-annihilation-induced photon spectra have been extended down to DM masses of 110 MeV, and they now include annihilation channels into light mesons.
 
The compressed file micromegas_6.0.tgz is about 22 MB, the unpacked program is about 100 MB. 
Download and unpack the tarball, then go to the micromegas_6.0 folder, e.g.:
 
tar -zxvf micromegas_6.0.tgz
cd micromegas_6.0
 
Detailed installation instructions are given in the README file in the top-level directory. 
An extensive manual is provided in the man directory.  
 
For more information, see the micrOMEGAs webpage.

Series information

v.6.2.4

  • For  downloading an external code  https is now used as  http  sometimes  lead  to problems.
  • For all models we add ./calchep_batch   in  the /work directory.  This gives the  user  the possibility to  organise batch calculations for  models included in micrOMEGAs.
  • darkOmegaTR  has been  improved to solve the stiff  problem  which occurred  when solving differential equations at large temperature.  Namely we substitute  Y(T)=Yeq(T)+dY(T), where dY(T) is obtained via solution of linearized equation.

 

v.6.2.3

  • Routines for calculation of the relic density  in slow inflaton decay scenario are added.
  •  Annihilation spectra for pi-mesons are included and compared with Hazma - arXiv:1907.11846. Annihilation spectra for  Kaons are included as well.
  • Annihilation spectra for light mesons and muons are calculated after the code applies a boost to the spectra at rest,  the contribution of FSR photons are then added
  • The tables for indirect detection based on Pythia-6 are extended to Mcdm=0.6GeV for all SM final states.
  • NMSSMTools_6.1 is used for the NMSSM
  • A bug with sorting of Higgs masses in the NMSSM is fixed. Now Mh1<=Mh2<=Mh3 while in  previous versions the masses were sorted according to the PDG numbers.
  • PPPC, CosmiXs, Pythia8 indirect detection spectra and their QCD uncertainties (for Pythia8) are not included in the distribution and are downloaded in runtime. 
  • LZ_2024(M) returns the 90% exclusion of the LZ experiment, arXiv:2410.17036.
  • X11 font  for CalcHEP sessions and displayPlot routines can be changed by Ctrl+/- , Ctrl<> and stored in CalcHEP_src/calchep.ini file.
  • LanHEP version 4.0.3 is included  in micrOMEGAs 

v.6.1.15

  - The C-code is improved to avoid warnings of C-compiler.
  - Improved link to LHAPDF.
  - Default set of parton distributions  is  cteq66.
  - A memory leak  in calls to vSigmaA and vSigmaS  is fixed. 
  - QCD uncertainties  of hadronization spectra for indirect detection are included:  arXiv: 2202.11546.
  -  1->4 decays are not computed if there are open 1->3 channels which all give zero contribution to the particle width.
  - New  positron  spectra from production of pions and kaons in light DM scenarios are implemented.
  -   A C-version of suspect for the MSSM is compiled if there is no Fortran compiler
  - New interface to SModelS_3.0.0, the combination of signal regions or analyses can be specified in main.c

 v.6.0.5

  • Remove another compilation problem on MAC,  thanks to Maria Gonçalves.
  • Update manual

v.6.0.4

- A compiler flag for clang is added to avoid compilation problems on MAC

v.6.0.3 : 

- In the calculation of the cross-section for DM DM-> W,W*, the lower limit on the center-of-mass momentum  is now set to Pcm = 1e-4*(2Mcdm) to avoid losing  precision at Pcm=0 when the s-wave contribution vanishes.

v.6.0.2 : 

- Update manual

v6.0.1 : 

  • Fixed a bug that slowed down the computation.

v6.0.0: Published January 5, 2024

Files

Files (18.4 MB)

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md5:348dd32d5dc328d038a700ede4bf2401
18.4 MB Download

Additional details

Related works

Is described by
Preprint: arXiv:2312.14894 (arXiv)

Funding

UK Research and Innovation
DARK MAtter for Precision experiments (DARKMAP) MR/T042575/1

Dates

Submitted
2024-01-05

Software

Development Status
Active