Effective chiral Lagrangians for heavy mesons and the unitarity triangle

by Giuseppe NARDULLI (CERN-TH)

Friday 25 Feb 2000, 14:00 → 14:15 Europe/Zurich

TH Auditorium (CERN)

Using the approximate symmetries for heavy quarks (spin-flavour symmetry) and light quarks (chiral symmetry) one can build a phenomenological Lagrangian for light and heavy mesons coupled by strong and weak interactions. At the lowest order in the light meson momenta these couplings are well defined, while the high momentum behaviour can be modelled by form factors. Applications to some decays sensitive to the unitarily triangle parameters are discussed: B -> DD + pion, B -> rho + pion.