Particle Flow reconstruction in the CMS Level-1 Trigger For The HL-LHC
* e-mail: Giovanni.Petrucciani@cern.ch
Published online: 17 September 2019
With the planned addition of the tracking information in the Level-1 trigger in CMS for the High-Luminosity Large Hadron Collider (HL-LHC), the algorithms for the Level-1 trigger can be completely reconceptualized. Following the example for offline reconstruction in CMS to use complementary subsystem information and mitigate pileup, we explore the feasibility of using Particle Flow-like and pileup-per-particle identification techniques at the hardware trigger level. We present the challenges of adapting these algorithm to the timing and resource constraints of the Level-1 trigger, the first prototype implementations, and the expected performance on physics object reconstruction.
© The Authors, published by EDP Sciences, 2019
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