Study of decay in the light-cone sum rules approach
XD Cheng, HB Li, B Wei, YG Xu, MZ Yang - Physical Review D, 2017 - APS
XD Cheng, HB Li, B Wei, YG Xu, MZ Yang
Physical Review D, 2017•APSWithin the QCD light-cone sum rule (LCSR) approach, we investigate the transition form
factors of D→ a 0 (980) up to the twist-3 light-cone distribution amplitudes (LCDAs) of the
scalar meson a 0 (980) in the two-quark picture. Using these form factors, we calculate the
differential decay widths and branching ratios of the D→ a 0 (980) e+ ν e semileptonic
decays. We obtain B (D 0→ a 0-(980) e+ ν e)=(4.0 8-1.22+ 1.37)× 10-4 and B (D+→ a 0 0
(980) e+ ν e)=(5.4 0-1.59+ 1.78)× 10-4. The results are sensitive to the a 0 (980) inner …
factors of D→ a 0 (980) up to the twist-3 light-cone distribution amplitudes (LCDAs) of the
scalar meson a 0 (980) in the two-quark picture. Using these form factors, we calculate the
differential decay widths and branching ratios of the D→ a 0 (980) e+ ν e semileptonic
decays. We obtain B (D 0→ a 0-(980) e+ ν e)=(4.0 8-1.22+ 1.37)× 10-4 and B (D+→ a 0 0
(980) e+ ν e)=(5.4 0-1.59+ 1.78)× 10-4. The results are sensitive to the a 0 (980) inner …
Within the QCD light-cone sum rule (LCSR) approach, we investigate the transition form factors of up to the twist-3 light-cone distribution amplitudes (LCDAs) of the scalar meson in the two-quark picture. Using these form factors, we calculate the differential decay widths and branching ratios of the semileptonic decays. We obtain B(D0→a0-(980)e+νe)=(4.08-1.22+1.37)×10-4 and B(D+→a00(980)e+νe)=(5.40-1.59+1.78)×10-4. The results are sensitive to the inner structure. These decays can be searched for at the BESIII experiment, and any experimental observations will be useful to identify internal quark contents of the meson, which will shed light on understanding theoretical models.
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