Semileptonic Λc→Λℓνℓ decays in light-cone QCD sum rules with Λc distribution amplitudes
European Physical Journal C, vol.86, no.1, 2026 (SCI-Expanded, Scopus)
- Publication Type: Article / Article
- Volume: 86 Issue: 1
- Publication Date: 2026
- Doi Number: 10.1140/epjc/s10052-026-15301-2
- Journal Name: European Physical Journal C
- Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Chemical Abstracts Core, Compendex, INSPEC, zbMATH, Directory of Open Access Journals, Nature Index
- Middle East Technical University Affiliated: Yes
Abstract
We study the semileptonic decay of its SU(3) partner, the Λc→Λℓ+νℓ (ℓ=e,μ) transition, within the framework of light-cone QCD sum rules (LCSR) by using the distribution amplitudes of heavy Λc baryon. The numerical analysis is performed using two different sets of Λc 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.