2025-03-31
13:31 |
Recent Experience with the CMS Data Management System
/ Ozturk, Hasan (CERN) ; Paparrigopoulos, Panos (CERN) ; Manrique Ardila, Andres (Wisconsin U., Madison) ; Chauhan, Rahul (Wisconsin U., Madison) ; Ellis, Katy (Rutherford) ; Emmanouil, Christos (CERN) ; Kovalskyi, Dmytro (MIT) ; Vaandering, Eric Wayne (Fermilab) ; Voetberg, Margaret Grace (Fermilab) ; Wightman, Andrew Steven (Nebraska U.)
/CMS Collaboration
The CMS experiment manages a large-scale data infrastructure, currently handling over 200 PB of disk and 500 PB of tape storage and transferring more than 1 PB of data per day on average between various WLCG sites. Utilizing Rucio for high-level data management, FTS for data transfers, and a variety of storage and network technologies at the sites, CMS confronts inevitable challenges due to the system's growing scale and evolving nature. [...]
CMS-CR-2025-055.-
Geneva : CERN, 2025 - 9 p.
Fulltext: PDF;
In : 27th International Conference on Computing in High Energy & Nuclear Physics, Kraków, Poland, 19 - 25 Oct 2024
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2025-03-24
13:03 |
CMS High Level Trigger(HLT) performance in Run 3
/ Maity, Dipak (Bhubaneswar, NISER)
/CMS Collaboration
The CMS experiment at CERN operates a two-stage trigger system to efficiently filter and record events of potential physics interest. The system consists of a hardware-based Level 1 (L1) trigger, which processes detector data at 40 MHz using fast electronics such as FPGAs and ASICs, reducing the data rate to around 110 kHz. [...]
CMS-CR-2025-083.-
Geneva : CERN, 2025 - 5 p.
Fulltext: PDF;
In : 26th DAE-BRNS High Energy Physics Symposium 2024, Varanasi, India, 19 - 23 Dec 2024
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2025-03-21
10:53 |
Measurement of W+W− production cross-section at 13.6 TeV with the CMS experiment
/ Phor, Saumya (Delhi U.)
/CMS Collaboration
The first measurements of W+W− production cross section in proton-proton collisions at a centre-of-mass energy of 13.6 TeV are presented.
The data used were recorded with the CMS detector at the LHC in 2022, corresponding to an integrated luminosity of 34.8 fb−1.
The events are selected by requiring one electron and one muon of opposite charge.
The total inclusive W+W− cross section is measured to be 125.7±5.6~pb, consistent with the standard model predictions.
Fiducial cross sections are also reported as a function of the jet multiplicity in the event and compared with different theoretical predictions..
CMS-CR-2025-067.-
Geneva : CERN, 2025 - 5 p.
Fulltext: PDF;
In : 26th DAE-BRNS High Energy Physics Symposium 2024, Varanasi, India, 19 - 23 Dec 2024
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2025-03-17
15:00 |
Experience with the alpaka performance portability library in the CMS software
/ ius ; ejdl
To achieve better computational efficiency and exploit a wider range of computing resources, the CMS software framework (CMSSW) has been extended to offload part of the physics reconstruction to NVIDIA GPUs. To support additional back-ends, as well to avoid the need to write, validate and maintain a separate implementation of the reconstruction algorithms for each back-end, CMS has adopted the Alpaka performance portability library.
Alpaka (Abstraction Library for Parallel Kernel Acceleration) is a header-only C++ library that provides performance portability across different back-ends, abstracting the underlying levels of parallelism. [...]
CMS-CR-2025-095.-
Geneva : CERN, 2025 - 9 p.
Fulltext: PDF;
In : 27th International Conference on Computing in High Energy & Nuclear Physics, Kraków, Pl, 19 - 25 Oct 2024
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2025-03-17
15:00 |
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2025-03-17
15:00 |
Probing global symmetries with top and Higgs at CMS
/ Chanon, Nicolas Pierre (IP2I, Lyon)
/CMS Collaboration
Several global symmetries of the Standard Model Lorentz invariance, CPT and CP symmetries are tested with top quarks and Higgs bosons using LHC data collected with the CMS detector. Top-antitop (tˉt) production is used to probe CPT symmetry and Lorentz invariance. [...]
CMS-CR-2025-076.-
Geneva : CERN, 2025 - 8 p.
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2025-03-17
15:00 |
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2025-03-17
15:00 |
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2025-03-11
14:07 |
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2025-03-11
14:07 |
Kalman filter for muon reconstruction in the CMS Phase-2 endcap calorimeter
/ Matthewman, Mark (Purdue U.) ; Rovere, Marco (CERN) ; Waltenberger, Wolfgang (Vienna, OAW) ; Brondolin, Erica (CERN)
/CMS Collaboration
The High Luminosity phase of the LHC (HL-LHC) will offer a greatly increased number of events for more precise standard model measurements and BSM searches. To cope with the harsh environment created by numerous simultaneous proton-proton collisions, the CMS Collaboration has begun construction of a new endcap calorimeter, the High-Granularity Calorimeters (HGCAL). [...]
CMS-CR-2025-073.-
Geneva : CERN, 2025 - 9 p.
Fulltext: PDF;
In : 27th International Conference on Computing in High Energy & Nuclear Physics, Kraków, Pl, 19 - 25 Oct 2024
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