CERN Accelerating science

CMS Note
Report number	CMS-CR-2018-264
Title	Triggering on electrons, photons, tau leptons, jets and energy sums with the CMS Level-1 trigger
Author(s)	Bhowmik, Sandeep (NICPB, Tallinn)
Collaboration	CMS Collaboration
Publication	SISSA, 2019
Imprint	11 Oct 2018
Number of pages	2
In:	PoS ICHEP2018 (2019) 866
In:	XXXIX International Conference on High Energy Physics, Seoul, Korea, 4 - 11 Jul 2018, pp.866
DOI	10.22323/1.340.0866
Subject category	Detectors and Experimental Techniques
Accelerator/Facility, Experiment	CERN LHC ; CMS
Abstract	The Compact Muon Solenoid (CMS) experiment implements a sophisticated two-level triggering system composed of the Level-1, instrumented by custom-design hardware boards, and a software High Level Trigger. A new Level-1 trigger architecture with improved performance is now being used to maintain high physics efficiency for the more challenging conditions experienced during Run II. In this poster, we present the upgraded CMS calorimeter trigger algorithms. The calorimeter trigger system plays a central role in achieving the ambitious physics program of Run II. The upgraded electronics architecture benefits from an enhanced granularity of the calorimeters to optimally reconstruct the trigger objects. Dedicated pile-up mitigation techniques are implemented for the lepton isolation, the jets and the missing transverse energy to keep the rate under control in the intense running conditions of the LHC. The performance of the new calorimeter trigger will be presented, based on proton-proton collision data collected in Run II. The selection techniques used to trigger efficiently on benchmark analyses will be presented, along with the strategies employed to guarantee efficient triggering for new resonances and other new physics signals.
Copyright/License	publication: © 2019-2024 The Authors (License: CC-BY-NC-ND-4.0)

Corresponding record in: Inspire