Speaker
Description
The weak interaction of B → DD¯ decays can be studied in the frame work of heavy flavor Effective Field Theory(EFT). An
alternative approach would be to assume flavor SU(3) symmetry between u,d and s quarks to study such (b → cc¯q¯) decays.
However, due to the mass difference (ms ? mu, md), in nature one has this flavor symmetry being broken. We calculated the
decay observables for B → DD¯ considering both exact and broken SU(3) symmetry. We performed numerical fitting of the
observables with the available data (LHCb, Belle, BaBar). We have found that the broken SU(3) picture explain the data
with more accuracy than the unbroken one. The similar SU(3) breaking effect in such decay channel is studied in terms of
topological amplitudes. Also, the sum rules between the decay modes are constructed and checked at the decay-width level
for before and after symmetry breaking.
