# Design and performance of the LHCb trigger and full real-time reconstruction in Run 2 of the LHC **Authors:** R. Aaij, S. Akar, J. Albrecht, M. Alexander, A. Alfonso Albero, S., Amerio, L. Anderlini, P. d'Argent, A. Baranov, W. Barter, S. Benson, D., Bobulska, T. Boettcher, S. Borghi, E. E. Bowen, L. Brarda, C. Burr, J.-P., Cachemiche, M. Calvo Gomez, M. Cattaneo, H. Chanal, M. Chapman, M. Chebbi, M., Chefdeville, P. Ciambrone, J. Cogan, S.-G. Chitic, M. Clemencic, J. Closier,, B. Couturier, M. Daoudi, K. De Bruyn, M. De Cian, O. Deschamps, F. Dettori,, F. Dordei, L. Douglas, K. Dreimanis, L. Dufour, G. Dujany, P. Durante, P.-Y., Duval, A. Dziurda, S. Esen, C. Fitzpatrick, M. Fontanna, M. Frank, M. Van, Veghel, C. Gaspar, D. Gerstel, Ph. Ghez, K. Gizdov, V.V. Gligorov, E., Govorkova, L.A. Granado Cardoso, L. Grillo, I. Guz, F. Hachon, J. He, D., Hill, W. Hu, W. Hulsbergen, P. Ilten, Y. Li, C.P. Linn, O. Lupton, D., Johnson, C.R. Jones, B. Jost, M. Kenzie, R. Kopecna, P. Koppenburg, M. Kreps,, R. Le Gac, R. Lef\`evre, O. Leroy, F. Machefert, G. Mancinelli, S., Maddrell-Mander, J.F. Marchand, U. Marconi, C. Marin Benito, M. Martinelli,, D. Martinez Santos, R. Matev, E. Michielin, S. Monteil, A. Morris, M.-N., Minard, H. Mohamed, M.J. Morello, P. Naik, S. Neubert, N. Neufeld, E. Niel,, A. Pearce, P. Perret, F. Polci, J. Prisciandaro, C. Prouve, A. Puig Navarro,, M. Ramos Pernas, G. Raven, F. Rethore, V. Rives Molina, P. Robbe, G. Sarpis,, F. Sborzacchi, M. Schiller, R. Schwemmer, B. Sciascia, J. Serrano, P., Seyfert, M.-H. Schune, M. Smith, A. Solomin, M. Sokoloff, P. Spradlin, M., Stahl, S. Stahl, B. Storaci, S. Stracka, M. Szymanski, M. Traill, A. Usachov,, S. Valat, R. Vazquez Gomez, M. Vesterinen, B. Voneki, M. Wang, C. Weisser, M., Whitehead, M. Williams, M. Winn, M. Witek, Z. Xiang, A. Xu, Z. Xu, H. Yin, Y., Zhang, Y. Zhou arXiv: 1812.10790 · 2019-06-26 ## TL;DR The LHCb experiment redesigned its trigger system for Run 2 to perform full offline-like reconstruction in real time, enabling immediate analysis and improving efficiency for physics research. ## Contribution This paper introduces the new real-time trigger and reconstruction system for LHCb's Run 2, a significant advancement over previous offline-only processing methods. ## Key findings - Successful real-time reconstruction of physics objects - Enhanced data quality and analysis efficiency - Demonstrated performance aligns with physics goals ## Abstract The LHCb collaboration has redesigned its trigger to enable the full offline detector reconstruction to be performed in real time. Together with the real-time alignment and calibration of the detector, and a software infrastructure to make persistent the high-level physics objects produced during real-time processing, this redesign enabled the widespread deployment of real-time analysis during Run 2. We describe the design of the Run 2 trigger and real-time reconstruction, and present data-driven performance measurements for a representative sample of LHCb's physics programme. ## Full text _Full body text omitted from this summary view._ Fetch the complete paper as Markdown: https://tomesphere.com/paper/1812.10790/full.md ## Figures 95 figures with captions in the complete paper: https://tomesphere.com/paper/1812.10790/full.md ## References 46 references — full list in the complete paper: https://tomesphere.com/paper/1812.10790/full.md --- Source: https://tomesphere.com/paper/1812.10790