Simulations of the measurement of the form factor for the D_s semileptonic decay with the PANDA detector

The PANDA experiment will study a wide range of physics topics with beams of antiprotons incident on fixed protons or complex nuclei targets. One of the interesting issues is the D_s semileptonic decay, which is governed by both the weak and strong forces. Here the strong interaction effects can be parameterized by the transition form factor. Techniques such as lattice QCD offer increasingly precise calculations, but as the uncertainties shrink, experimental validation of the results becomes increasingly important. The achievable performance of the full PANDA detector for these types of reactions has not yet been studied in detail; however, this is expected to work very well based upon the design performance and experience with similar detector systems. We evaluate the performance in the measurement of the semileptonic decay form factor of D_s⁺ → ην_ee⁺. With different beam momenta, the Monte Carlo studies have been performed to obtain the achievable reconstruction efficiency using a complete simulation model of the detector and analysis tools. In the reconstruction procedure, we focus on developing the software and evaluating the expected precision. This talk summarizes the simulation status of the D_s decay chain. With theoretical predictions of the cross section, we obtain a preliminary estimate of the expected count rate for the future data taking.