2023-05-24
09:58 |
Jet Reconstruction with the Seeded Cone algorithm in the CMS Phase-2 Level-1 Trigger
/CMS Collaboration
The Phase-2 upgrade of the CMS detector for the High Luminosity upgrade of the LHC (HL-LHC) [CMS-TDR-021] includes the introduction of many new capabilities into the Level-1 trigger, including tracking and the new high-granularity calorimeter. The combination of the precise information coming from the muon, calorimeter and tracking system will allow particle candidates to be reconstructed with the Particle Flow algorithm. [...]
CMS-DP-2023-023; CERN-CMS-DP-2023-023.-
Geneva : CERN, 2023 - 11 p.
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2023-05-24
09:58 |
Continual Learning in the CMS Phase-2 Level-1 Trigger
/CMS Collaboration
Machine Learning (ML) algorithms are a key enhancement of the CMS Level-1 (L1) Trigger Phase-2 upgrade. However, they may lack robustness against domain shift due to changing experimental conditions. [...]
CMS-DP-2023-022; CERN-CMS-DP-2023-022.-
Geneva : CERN, 2023 - 16 p.
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2023-05-22
15:30 |
First Data Taken with the Level-1 Data Scouting System
/CMS Collaboration
The Level-1 40 MHz data scouting system will record trigger objects created by the Phase-2 Level-1 trigger at the bunch crossing rate, enabling novel analyses and improving monitoring capabilities.
At the end of 2018 and from the beginning of LHC Run-3 a demonstrator system has been in operation, taking data initially from the CMS Phase-1 Global Muon Trigger and recently, from mid-2021, also from the CMS Phase-1 Calorimeter Trigger. First data obtained this novel system are shown here. [...]
CMS-DP-2023-026; CERN-CMS-DP-2023-026.-
Geneva : CERN, 2023 - 7 p.
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2023-05-22
15:30 |
40MHz Scouting Muon Studies
/CMS Collaboration
The 40MHz Scouting system is a novel data acquisition system, parallel to the Level-1 trigger, that collects the Level-1 trigger primitives at the full bunch crossing rate.
It was first demonstrated in 2018 at the end of Run 2 and the system has been updated
for Run 3. The Run 3 demonstrator captures data from multiple sources: the outputs of the Global Muon Trigger (GMT), data from Calorimeter Layer 2 and the Global Trigger (GT) and the inputs of the Barrel Muon Track Finder (BMTF)..
CMS-DP-2023-025; CERN-CMS-DP-2023-025.-
Geneva : CERN, 2023 - 12 p.
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2023-05-22
15:30 |
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2023-05-02
11:45 |
Performance of the ParticleNet tagger on small and large-radius jets at High Level Trigger in~Run~3
/CMS Collaboration
For Run 2022, the ParticleNet tagger aiming at identifying b-jets signatures and resonances decaying to a pair of b-jets X$\rightarrow$bb was deployed at the High Level Trigger. The following studies show the ParticleNet performance on small-radius jets ($\Delta$R=0.4) for simulated b jets compared to the performance of DeepJet and DeepCSV taggers standardly used in Run 2. [...]
CMS-DP-2023-021; CERN-CMS-DP-2023-021.-
Geneva : CERN, 2023 - 8 p.
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2023-05-02
11:45 |
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2023-05-02
11:45 |
Performance of Line Segment Tracking algorithm at HL-LHC
/CMS Collaboration
This note documents the performance of the Line Segment Tracking (LST) algorithm. The LST algorithm performs combining hits in local regions of the detector in parallel on GPU. [...]
CMS-DP-2023-019; CERN-CMS-DP-2023-019.-
Geneva : CERN, 2023 - 27 p.
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2023-04-17
15:48 |
Performance of DeepJet b-tagging algorithms at High Level Trigger using Run 3 data from the CMS Experiment
/CMS Collaboration
The performance of DeepJet b-tagging at High Level Trigger is studied on 35.1\,fb$^{-1}$ of data recorded by the CMS Experiment in 2022 with a center-of-mass energy of $\sqrt{s} =$ 13.6\,TeV.
No dependence of b-tagging performance on increased instantaneous luminosity was observed.
As expected, the b-tagging triggers accept jets with higher offline b-tagging values compared to a reference trigger..
CMS-DP-2023-018; CERN-CMS-DP-2023-018.-
Geneva : CERN, 2023 - 12 p.
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2023-04-17
15:48 |
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