https://doi.org/10.1140/epjc/s10052-026-15301-2
Regular Article - Theoretical Physics
Semileptonic 
decays in light-cone QCD sum rules with 
distribution amplitudes
1
Department of Physics, Middle East Technical University, 06800, Ankara, Turkey
2
TUBITAK ULAKBIM, 06510, Ankara, Turkey
a
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Received:
3
November
2025
Accepted:
4
January
2026
Published online:
24
January
2026
Abstract
We study the semileptonic decay of its SU(3) partner, the 
(
) transition, within the framework of light-cone QCD sum rules (LCSR) by using the distribution amplitudes of heavy baryon. The numerical analysis is performed using two different sets of baryon light-cone distribution amplitudes. The resulting form factors are parametrized by a model-independent z-series expansion and used to compute the differential and total decay widths. Our predictions for the branching fractions are in good agreement with the latest BESIII measurements and with lattice-QCD results.
© The Author(s) 2026
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