CLFQM calculations of D(s) to P/S/V/A form factors and branching ratios agree with data for most P and V channels but show notable discrepancies for several S and A channels.
10− 3 × B r(D+ → ηe+νe) 10− 3 × B r(D+ → ηµ +νµ ) 10− 4 × B r(D+ → η′e+νe) 10− 4 × B r(D+ → η′µ +νµ ) This work 1
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Systematic analysis of $D_{(s)}$ meson semi-leptonic decays in the covariant light-front quark model
CLFQM calculations of D(s) to P/S/V/A form factors and branching ratios agree with data for most P and V channels but show notable discrepancies for several S and A channels.