Development of a multivariate technique based trigger for the selection of D*+ meson at LHCb

This thesis has been developed within the LHCb experiment, which is one of the four detectors located at LHC. LHC provides large quantity of data, but not all events produced in proton-proton interaction can be saved for off-line analysis. This forces the development of on-line selection system, which has to select and collect only physically meaningful algorithm to select events with D*+ meson, which has to replace the current D*+ trigger.