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Design of the Global Reconstruction Logic in the Belle II Level-1 Trigger system

Fuente: arXiv

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Auteurs principaux:	Lai, Y. -T., Koga, T., Iwasaki, Y., Ahn, Y., Bae, H., Campajola, M., Cheon, B. G., Cho, H. -E., Ferber, T., Haide, I., Heine, G., Hsu, C. -L., Kiesling, C., Kim, C. -H., Kim, J. B., Kim, K., Kim, S. H., Lee, I. S., Lee, M. J., Liao, Y. P., Lin, J., Little, A., Moon, H. K., Nakazawa, H., Neu, M., Nishida, S., Reuter, L., Savinov, V., Sheng, T. -A., Shiu, J. -G., Sue, Y., Unger, K., Unno, Y., Won, E., Xu, Z.
Format:	Preprint
Publié:	2025
Sujets:	High Energy Physics - Experiment Instrumentation and Detectors
Accès en ligne:	Acceder al recurso
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_version_	1866913840599400448
author	Lai, Y. -T. Koga, T. Iwasaki, Y. Ahn, Y. Bae, H. Campajola, M. Cheon, B. G. Cho, H. -E. Ferber, T. Haide, I. Heine, G. Hsu, C. -L. Kiesling, C. Kim, C. -H. Kim, J. B. Kim, K. Kim, S. H. Lee, I. S. Lee, M. J. Liao, Y. P. Lin, J. Little, A. Moon, H. K. Nakazawa, H. Neu, M. Nishida, S. Reuter, L. Savinov, V. Sheng, T. -A. Shiu, J. -G. Sue, Y. Unger, K. Unno, Y. Won, E. Xu, Z.
author_facet	Lai, Y. -T. Koga, T. Iwasaki, Y. Ahn, Y. Bae, H. Campajola, M. Cheon, B. G. Cho, H. -E. Ferber, T. Haide, I. Heine, G. Hsu, C. -L. Kiesling, C. Kim, C. -H. Kim, J. B. Kim, K. Kim, S. H. Lee, I. S. Lee, M. J. Liao, Y. P. Lin, J. Little, A. Moon, H. K. Nakazawa, H. Neu, M. Nishida, S. Reuter, L. Savinov, V. Sheng, T. -A. Shiu, J. -G. Sue, Y. Unger, K. Unno, Y. Won, E. Xu, Z.
contents	The Belle~II experiment is designed to search for physics beyond the Standard Model by investigating rare decays at the SuperKEKB \(e^{+}e^{-}\) collider. Owing to the significant beam background at high luminosity, the data acquisition system employs a hardware-based Level-1~Trigger to reduce the readout data throughput by selecting collision events of interest in real time. The Belle~II Level-1~Trigger system utilizes FPGAs to reconstruct various detector observables from the raw data for trigger decision-making. The Global Reconstruction Logic receives these processed observables from four sub-trigger systems and provides a global summary for the final trigger decision. Its logic encompasses charged particle tracking, matching between sub-triggers, and the identification of special event topologies associated with low-multiplicity decays. This article discusses the hardware devices, FPGA firmware, integration with peripheral systems, and the design and performance of the trigger algorithms implemented within the Global Reconstruction Logic.
format	Preprint
id	arxiv_https___arxiv_org_abs_2503_02192
institution	arXiv
publishDate	2025
record_format	arxiv
spellingShingle	Design of the Global Reconstruction Logic in the Belle II Level-1 Trigger system Lai, Y. -T. Koga, T. Iwasaki, Y. Ahn, Y. Bae, H. Campajola, M. Cheon, B. G. Cho, H. -E. Ferber, T. Haide, I. Heine, G. Hsu, C. -L. Kiesling, C. Kim, C. -H. Kim, J. B. Kim, K. Kim, S. H. Lee, I. S. Lee, M. J. Liao, Y. P. Lin, J. Little, A. Moon, H. K. Nakazawa, H. Neu, M. Nishida, S. Reuter, L. Savinov, V. Sheng, T. -A. Shiu, J. -G. Sue, Y. Unger, K. Unno, Y. Won, E. Xu, Z. High Energy Physics - Experiment Instrumentation and Detectors The Belle~II experiment is designed to search for physics beyond the Standard Model by investigating rare decays at the SuperKEKB \(e^{+}e^{-}\) collider. Owing to the significant beam background at high luminosity, the data acquisition system employs a hardware-based Level-1~Trigger to reduce the readout data throughput by selecting collision events of interest in real time. The Belle~II Level-1~Trigger system utilizes FPGAs to reconstruct various detector observables from the raw data for trigger decision-making. The Global Reconstruction Logic receives these processed observables from four sub-trigger systems and provides a global summary for the final trigger decision. Its logic encompasses charged particle tracking, matching between sub-triggers, and the identification of special event topologies associated with low-multiplicity decays. This article discusses the hardware devices, FPGA firmware, integration with peripheral systems, and the design and performance of the trigger algorithms implemented within the Global Reconstruction Logic.
title	Design of the Global Reconstruction Logic in the Belle II Level-1 Trigger system
topic	High Energy Physics - Experiment Instrumentation and Detectors
url	https://arxiv.org/abs/2503.02192