Current s-Quark Mass Corrections to the Form Factors of D-Meson Semileptonic Decays

F. Hussain, A. N. Ivanov, N. I. Troitskaya

The infinite mass effective theory, when a heavy quark mass tends to infinity, and Chiral perturbation theory at the quark level, based on the extended Nambu -- Jona -- Lasinio mod…