Design and performance of the LHCb trigger and full real-time reconstruction in Run 2 of the LHC

Roel Aaij , Michael Alexander , Alejandro Alfonso Albero , Silvia Amerio , Lucio Anderlini , Alexander Baranov , Sean Benson , Dana Bobulska , Thomas Boettcher , Silvia Borghi , Loic Brarda , Christopher Burr , Marco Cattaneo , Mohamed Chebbi , Maximilien Chefdeville (1) , Stefan-Gabriel Chitic , Marco Clemencic , Joel Closier , Benjamin Couturier , Mohammed Daoudi , Michel de Cian , Francesco Dettori , Lauren Douglas , Karlis Dreimanis , Giulio Dujany (2) , Paolo Durante , Agnieszka Dziurda , Conor Fitzpatrick , Markus Frank , Clara Gaspar , Philippe Ghez (3) , Vladimir Gligorov (2) , Ekaterina Govorkova , Luis Alberto Granado Cardoso , Lucia Grillo , Jibo He , Donal Hill , Wenhua Hu , Wouter Hulsbergen , Philip Ilten , Daniel Johnson , Christopher Jones , Beat Jost , Patrick Koppenburg , Michal Kreps , Jean François Marchand , Umberto Marconi (4) , Carla Marin Benito (4) , Diego Martinez Santos , Emanuele Michielin , Marie-Noelle Minard (5) , Hristo Mohamed , Michael Joseph Morello , Niko Neufeld , Francesco Polci (2) , Jessica Prisciandaro , Albert Puig Navarro , Miguel Ramos Pernas , Gerhard Raven , Vicente Rives Molina , Gediminas Sarpis , Francesco Sborzacchi , Manuel Schiller , Rainer Schwemmer , Barbara Sciascia , Mark Smith , Patrick Spradlin , Sascha Stahl , Simone Stracka , Maciej Pawel Szymanski , Murdo Traill , Sebastien Valat , Ricardo Vazquez Gomez , Mika Vesterinen , Balazs Voneki , Constantin Weisser , Mike Williams , Mariusz Witek , Zhiyu Xiang , Zhirui Xu (5) , Hang Yin , Yixiong Zhou

1 USMB [Université de Savoie] [Université de Chambéry] - Université Savoie Mont Blanc
2 LPNHE (UMR_7585) - Laboratoire de Physique Nucléaire et de Hautes Énergies
3 LAPP - Laboratoire d'Annecy de Physique des Particules
4 LAL - Laboratoire de l'Accélérateur Linéaire
5 UGA [2016-2019] - Université Grenoble Alpes [2016-2019]

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.

Mots clés: Performance of High Energy Physics Detectors; Trigger concepts and systems (hardware and software); Large detector-systems performance; Trigger algorithms; p p: scattering; p p: colliding beams; LHC-B: performance; detector: calibration; trigger: efficiency; CERN LHC Coll; programming; detector: alignment; off-line; experimental results

Domaines: Physique des Hautes Energies - Expérience [hep-ex]; Instrumentations et Détecteurs [physics.ins-det]

Roel Aaij, Michael Alexander, Alejandro Alfonso Albero, Silvia Amerio, Lucio Anderlini, et al.. Design and performance of the LHCb trigger and full real-time reconstruction in Run 2 of the LHC. JINST, 2019, 14 (04), pp.P04013. ⟨10.1088/1748-0221/14/04/P04013⟩. ⟨hal-02058844⟩