Analysis of the strong <i>D</i>₂* (2460)<SUP>0</SUP> → <i>D</i><SUP>+</SUP> π<SUP>-</SUP> and D_s2*(2573)<SUP>+</SUP> → <i>D</i><SUP>+</SUP> <i>K</i><SUP>0</SUP> transitions via QCD sum rules

Abstract

The strong D-2* (2460)(0) -> D+ pi(-) and D-s2* (2573)(+) -> D+ K-0 transitions are analyzed via three-point QCD sum rules. First we calculate the corresponding strong coupling constants g(D2)*D pi and g(Ds2)*DK. Then we use them to calculate the corresponding decay widths and branching ratios. Making use of the existing experimental data on the ratio of the decay width in the pseudoscalar D channel to that of the vector D* channel, finally, we estimate the decay width and branching ratio of the strong D-2(*) (2460)(0) -> D*(2010)(+)pi(-) transition.