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Benjamin Jonah

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Articles by Benjamin Jonah

Particle Flow and PUPPI in the Level-1 trigger at CMS for the HL-LHC

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By Benjamin Jonah
| cds.cern.ch
With the planned addition of tracking information to the Compact Muon Solenoid (CMS) Level-1 trigger for the High-Luminosity Large Hadron Collider (HL-LHC), the trigger algorithms can be completely reconceptualized. We explore the feasibility of using Particle Flow-like reconstruction and pileup per particle identification (PUPPI) pileup mitigation at the hardware trigger level. This represents a new type of multi-subdetector pattern recognition challenge for the HL-LHC.
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CERN Document Server

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By Mark John Verified, Jesra Lilah, Thomas Stephen, Benjamin Jonah, Isabel Rose
| cds.cern.ch
The CMS Level-1 calorimeter trigger is being upgraded in two stages to maintain performance as the LHC increases pile-up and instantaneous luminosity in its second run. In the first stage, improved algorithms including event-by-event pile-up corrections are used. New algorithms for heavy ion running have also been developed. In the second stage, higher granularity inputs and a time-multiplexed approach allow for improved position and energy resolution.
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