A Study of Hit-time Reconstruction of Belle II Silicon Vertex Detector

Uematsu, Y.; Adamczyk, K.; Aihara, H.; Aziz, T.; Bacher, S.; Bahinipati, S.; Batignani, G.; Baudot, J.; Behera, P. K.; Bettarini, S.; Bilka, T.; Bozek, A.; Buchsteiner, F.; Casarosa, G.; Chen, Y. Q.; Corona, L.; Czank, T.; Das, S. B.; Dash, N.; Dujany, G.; Forti, F.; Friedl, M.; Ganiev, E.; Gobbo, B.; Halder, S.; Hara, K.; Hazra, S.; Higuchi, T.; Irmler, C.; Ishikawa, A.; Jeon, H. B.; Jin, Y.; Joo, C.; Kaleta, M.; Kaliyar, A. B.; Kandra, J.; Kang, K. H.; Kapusta, P.; Kodyš, P.; Kohriki, T.; Kumar, M.; Kumar, R.; Kvasnička, P.; La Licata, C.; Lalwani, K.; Lee, S. C.; Y. B., Li; Libby, J.; Mayekar, S. N.; Mohanty, G. B.; Morii, T.; Nakamura, K. R.; Natkaniec, Z.; Onuki, Y.; Ostrowicz, W.; Paladino, A.; Paoloni, E.; Park, H.; Polat, G.; Rao, K. K.; Ripp-Baudot, I.; Rizzo, G.; Rout, N.; Sahoo, D.; Schwanda, C.; Serrano, J.; Suzuki, J.; Tanaka, S.; Tanigawa, H.; Thalmeier, R.; Tsuboyama, T.; Verbycka, O.; Vitale, L.; Wan, K.; Webb, J.; Wiechczynski, J.; Yin, H.; Zani, L.

doi:10.7566/JPSCP.34.010017

For stable operation of the Belle II Silicon Vertex Detector in the future high-luminosity operation of SuperKEKB, we plan to reduce readout data-samples per trigger and to apply hit-selection using hit-time. To realize this plan, we developed novel hit-time estimation methods, one of which achieves the resolution of 2.28 ± 0.04 ns evaluated in the current data acquisition mode. A study using Monte Carlo simulation also confirms that the hit-selection based on this hit-time improves track reconstruction performance.