Mulugeta, Samuel2018-07-022023-11-092018-07-022023-11-092011-06http://10.90.10.223:4000/handle/123456789/5450This project mainly describe the introduction to chiral perturbation theory for strong interaction at low energy level and deals with quantum chromodynamics and its global symmetry in the concept of chiral limit. This project also describe the commutator and anti commutator of charge operators of quarks in hadron spectrum. Then we will construct e ective Lagrangian for both global and local symmetry and it show e ective Lagrangian is invariant under Su(3)L Su(3)R symmetry transformation.Then we calculate currents from e ective Lagrangian. Finally, by discussing e ective Lagrangian and weingers power counting scheme we will see application of quantum chromodynamics,especially pion decayenApplications to Some Hadronic ProcessThesis