Semileptonic $$\Lambda _c \rightarrow \Lambda \ell \nu _\ell $$ decays in light-cone QCD sum rules with $$\Lambda _c$$ distribution amplitudes
Abstract
Abstract We study the semileptonic decay of its SU(3) partner, the $$\Lambda _c \rightarrow \Lambda \ell ^+ \nu _\ell $$ Λ c → Λ ℓ + ν ℓ ( $$\ell = e, \mu $$ ℓ = e , μ ) transition, within the framework of light-cone QCD sum rules (LCSR) by using the distribution amplitudes of heavy $$\Lambda _c$$ Λ c baryon. The numerical analysis is performed using two different sets of $$\Lambda _c$$ Λ c 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.
Fields of Study & Subjects
Particle physics theoretical and experimental studies
Quantum Chromodynamics and Particle Interactions
High-Energy Particle Collisions Research
Publication details
- Journal / source
- The European Physical Journal C
- Publisher
- Springer Science and Business Media LLC
- Volume
- 86
- Issue
- 1
- Publication date
- 24 January 2026
- Language
- EN