Seminarium Teorii Oddziaływań Elementarnych

We overview the momentum space equations of high energy factorisationfocusing in particular on the Balitsky-Fadin-Kuraev-Lipatov (BFKL),Balitsky-Kovchegov (BK), Catani-Ciafaloni-Fiorani-Marchesini (CCFM)equations. In order to study such effects like parton saturation infinal states one is inevitably led to investigate how to combinephysics of the BK and CCFM evolution equations. We present recentlyproposed evolution equations which unifies the BK and the CCFMequations. The recent developement was motivated by the regime of QCDexplored nowadays at LHC, where both the total energy of collision andmomenta transfers are high.