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 Ds mesons decaying to light scalar mesons f0 ( 980 ) and a0 ( 980 ). The transition form factors are then utilized to compute the semileptonic branching fractions. We study the channels, namely, D(s)+ → f0 ( 980 ) ℓ+ νℓ and D → a0 ( 980 ) ℓ+ νℓ for ℓ = e and μ . For computation of semileptonic branching fractions, we consider the a0 ( 980 ) meson to be the conventional quark-antiquark structure and the f0 ( 980 ) meson as the admixture of ss and light quark-antiquark pairs. Our findings are found to support the recent BESIII data.