Abstract:
The aim of the project was to study and derive di erential decay rate
for B to D* semileptonic decay. At later stage, the di erential decay rate
for B to D with an additional operator added to hamiltonian of SM is
calculated. For both cases of semileptonic decays of B mesons : B to D *
and B to D , mass of -lepton is considered but neutrino is taken to be
massless because of its negligible mass in comparison to other elementary
particles involved in decay process. At some point of time, the study to
methods to determine neutrino mass hierarchy was also done.
