Transition form factors of the Λb→Λ(1520) in QCD light-cone sum rules

In this work, we investigate the transition form factors for Lambda(b)->Lambda(1520) within the framework of light-cone sum rules (LCSR), using the light-cone distribution amplitudes (LCDAs) of the Lambda(b)-baryon. In the hadronic representation of the correlation function, we carefully select the appropriate Lorentz structures and isolate the contributions from both the Lambda(1520)(J(P)=(3/2)(-)) and the Lambda(1890)(J(P)=(3/2)(+)), ensuring that the form factors for Lambda(b)->Lambda(1520) can be calculated unambiguously. We also provide predictions for various physical observables in the decay Lambda(b)->Lambda(1520)l(+)l(-),including the differential branching fraction, the lepton-side forward-backward asymmetry, the longitudinal polarization fraction, and the CP-averaged normalized angular observable. Our prediction for the differential branching fraction of Lambda(b)->Lambda(1520)mu(+)mu(-) is in good agreement with the LHCb measurement within the uncertainties.