Semileptonic decays of charmed mesons to light scalar mesons

Within the framework of covariant confined quark model, we compute the transition form factors of D and D-s mesons decaying to light scalar mesons f(0)(980) and a(0)(980). The transition form factors are then utilized to compute the semileptonic branching fractions. We study the channels, namely, D-(s)(+) -> f(0)(980)l(+)nu(l) and D -> a(0)(980)l(+)nu(l) for l = e and mu. For computation of semileptonic branching fractions, we consider the a(0)(980) meson to be the conventional quark-antiquark structure and the f(0)(980) meson as the admixture of ss and light quark-antiquark pairs. Our findings are found to support the recent BESIII data.