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T: Fachverband Teilchenphysik

T 72: Eingeladene Vorträge IV

T 72.2: Eingeladener Vortrag

Donnerstag, 22. März 2018, 14:24–14:48, Z6 - HS 0.002

Real-time Analysis with the LHCb Trigger, present and future — •Sascha Stahl — CERN

The LHCb detector and its trigger enable a wide range of physics measurements at the LHC in proton and heavy ion collisions in the forward region. The experiment will have a major upgrade in the next long shutdown to increase the instantaneous luminosity by a factor of five. The high production rate of beauty and charm hadrons in proton-proton collisions make it impossible to save the full information of all decays in the limited offline storage. To overcome this problem in Run 2 and for the Upgrade, LHCb has implemented a novel approach: it is the first ever High Energy Physics detector which is aligned, calibrated, and fully reconstructed in real-time. This means the information needed for data analysis is immediately available and less information needs to be stored, dramatically increasing the number of events which can be written to the offline storage. To further increase efficiency and flexibility in the Upgrade the trigger system will be fully implemented in software and the full detector is read out at the LHC crossing rate of 40 MHz. The performance of the real-time analysis approach in Run 2 is reviewed, and an outlook to the challenges and possible solutions for Run 3 is given.