Introduction In the last 30 years we have made great progress both ...

Calculation of cross sections and in micrOMEGAsnumout *cc ;// numout – is a type for matrix element in micrOMEGAs.cc = newProcess(char*Process); // call CalcHEP to calculate symbolicallyand compile matrix element for given process. For instancecc = newProcess(“e,E->m,M”);Then cross sections of 2->2 processes can be calculated bycs= cs22(cc,L,Pcm,cos_min,cos_max,&err);Pcm – momentum in Center of Mass reference framecos_min, cos_max - cuts for cosine of scattering angle in the same frameL=1 in case you have generated codes only for one process. For general caseL numerates subprocesses.hCollider( Pcm, pp, pName1, pName2) calculates cross section ofproduction of two heavy particle on hadron collider. If pp>0 then protonprotoncase collision is considered, otherwise p proton-antiproton one. ForexamplehCollider(35000.,1 , “~u1”,”~U1” ) calculates cross section in [pb] of squarkproduction at LHC.26