Speaker
Description
"We study the nonleptonic weak decays of doubly charmed baryons (Bcc) into singly charmed baryons (Bc) and vector mesons (V), denoted as Bcc → BcV. The short-distance contributions are calculated within the naive factorization hypothesis, while the long-distance final-state interaction effects are modeled via hadronic triangle diagrams. Unlike previous approaches, which compute only the imaginary part using the Cutkosky cutting rule, we evaluate the complete loop integrals to obtain both the real and imaginary parts of the amplitudes. These provide the nontrivial strong phases essential for CP violation. The model parameters are determined using experimental data. With this improved
calculation method, we predict the branching ratios and decay asymmetry parameters for various decay channels, as well as CP violations for short-distance dominated and singly Cabibbo-suppressed channels.
This strengthens our theoretical framework for future study of doubly charmed baryons. Certain decays, primarily driven by long-distance effects, have been calculated, and their observation in future experiments could help clarify the role of final-state interactions in charm baryon decays. Therefore, our calculation of Bcc → BcV provides crucial predictions for branching ratios, decay asymmetry parameters, and CP violation, which are essential for guiding experimental study at LHCb."
