Development of deep neural network first-level hardware track trigger for the Belle II experiment. - Liu, Y.-X.; Koga, T.; Bae, H.; Yang, Y.; Kiesling, C.; Meggendorfer, F.; Unger, K.; Hiesl, S.; Forsthofer, T.; Ishikawa, A.; Ahn, Y.; Ferber, T.; et al. (Nuclear Instruments & Methods in Physics Research Section A, 2026)