Speaker
Description
We present a full-simulation study of longitudinal Λ polarization in strange-tagged Z → ss̄ events with the AGORA detector at CEPC. A source-dependent polarization model, based on the OPAL benchmark, is implemented directly in event generation and propagated through the CEPC AGORA detector full simulation and reconstruction. Strange-jet tagging and Λ → pπ reconstruction define an inclusive sample and two disjoint categories with distinct Λ source compositions. Polarization is extracted from the reconstructed decay-angle distributions, with an independent unpolarized simulation used to model the detector response. The analysis recovers the injected inclusive polarization and enables a source-resolved extraction of the direct-primary-s Λ polarization together with a common polarization for Λ from Σ, Ξ, and Ξ sources. We demonstrate closure with the current simulated samples and project the sensitivity to a Tera-Z dataset, providing a framework for precision studies of strange-quark polarization transfer in Z decays.
