https://doi.org/10.1140/epjc/s10052-021-08956-6
Regular Article - Theoretical Physics
Semileptonic decay of 
from light-cone sum rules
Department of Physics, College of Liberal Arts and Sciences, National University of Defense Technology, 410073, Changsha, Hunan, People’s Republic of China
Received:
19
January
2021
Accepted:
2
February
2021
Published online:
18
February
2021
The weak decay process of 
to 
is calculated in the method of QCD light-cone sum rule. The decay width of and its decay branching ratio are also calculated with the form factors from this work’s calculation. To the twist-6 distribution amplitudes, the form factors 
and 
are given at zero recoil point. The result of the semileptonic decay width of 
is 
, and the prediction of the decay branching ratio 
. These results fit well with other works, and the decay width and branching ratio are improved. This not too small branching ratio gives a good direction to explore this decay channel in the future experiments.
© The Author(s) 2021
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