Grenville, J. A. S. This thesis I tried to look after the techniques used in the analysis of the Bs >Dspi decay, using data from the LHCb experiment operated at the LHC, CERN in order to investigate an enhancement of the performance of the classification of the events. Bs >Dspi channel is used as control for the Bs >KDs channel which is hoped to be useful for a new/independent measurement of the angle gamma from the Cabibbo Kobayashi Maskawa matrix.…