ABSTRACT
In this chapter we present the MSSM particle mass spectrum and interactions. The determination of sparticle masses and couplings requires the evolution of the relevant soft SUSY breaking terms from the GUT scale down to the EW scale. In addition, one should consider that EWSB may lead to mixing among different particles, hence different mass and interaction eigenstates can be obtained. It is worth mentioning that, in this chapter, we are considering general (non-universal) soft SUSY breaking terms, unless specified otherwise, to analyse the most general SUSY spectrum.
