CMS CR-2017 / 351 The Compact Muon Solenoid Experiment

With ever increasing luminosity at the LHC, optimum online data selection is getting more and more important. While in the case of some experiments (LHCb and ALICE) this task is being completely transferred to computer farms, the others ATLAS and CMS will not be able to do this in the medium-term future for technological, detector-related reasons. Therefore, these experiments pursue the complementary approach of migrating more and more of the offline and High-Level Trigger intelligence into the trigger electronics. This paper illustrates how the Level-1 Trigger of the CMS experiment and in particular its concluding stage, the Global Trigger, take up this challenge. Presented at TWEPP 2017 Topical Workshop on Electronics for Particle Physics 2017 Data analysis at Level-1 Trigger level Johannes Wittmann∗†, Bernhard Arnold, Gregor Aradi, Herbert Bergauer, Manfred Jeitler and Claudia-Elisabeth Wulz Austrian Academy of Sciences, Institute of High Energy Physics E-mail: Johannes.Wittmann@cern.ch, Bernhard.Arnold@oeaw.ac.at, Gregor.Aradi@oeaw.ac.at, Herbert.Bergauer@oeaw.ac.at, Manfred.Jeitler@cern.ch, Claudia.Wulz@cern.ch Leonard Apanasevich University of Illinois at Chicago E-mail: Leonard.Apanasevich@cern.ch Brian L. Winer and Darren M. Puigh Ohio State University E-mail: Brian.Winer@cern.ch, dpuigh@gmail.com With ever increasing luminosity at the LHC, optimum online data selection is getting more and more important. While in the case of some experiments (LHCb and ALICE) this task is being completely transferred to computer farms, the others ATLAS and CMS will not be able to do this in the medium-term future for technological, detector-related reasons. Therefore, these experiments pursue the complementary approach of migrating more and more of the offline and High-Level Trigger intelligence into the trigger electronics. This paper illustrates how the Level-1 Trigger of the CMS experiment and in particular its concluding stage, the Global Trigger, take up this challenge. Topical Workshop on Electronics for Particle Physics 11 14 September 2017 Santa Cruz, California ∗Speaker. †for the CMS collaboration c © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0). https://pos.sissa.it/ Data analysis at Level-1 Trigger level Johannes Wittmann