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 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

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.tgzcd 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.