CMS

Probing Anomalies: CMS experiment investigates possible hints of new physics

For a few years, the work of the LHC community has been split between the exploitation of the LHC Run2 and first Run3 data and the preparation for the High Luminosity (HL) phase. At the HL-LHC, the effort of searching for new physics will be…

NextGen Triggers: Pioneering R&D for HL-HC Data Acquisition and Event Processing

The High-Luminosity LHC upgrade will provide an unprecedented challenge to the data acquisition and online event processing capabilities of ATLAS and CMS. Both experiments are currently undergoing major upgrades to prepare their detectors to cope…

Edge SpAIce: Leveraging CERN's AI for Real-Time Ocean Plastic Tracking from Space

Earth Observation (EO) and particle physics research have more in common than you might think. In both environments, whether capturing fleeting particle collisions or detecting transient traces of ocean plastics, rapid and accurate data analysis is…

Navigating the Data Tsunami: CMS Prompt Data Processing and Distribution in Run 3

Improvements implemented in the CMS trigger and data acquisition systems before the start of Run 3 LHC in 2022 have enabled an increase in both the event rate and the volume of useful data collected by the CMS detector, thereby broadening its…

ATLAS and CMS unite to weigh in on the top quark

The ATLAS and CMS Experiments at CERN have just released a new measurement of the mass of the top quark. The new result combines 15 previous measurements to give the most precise determination of the top-quark mass to date. Among the known…

Ending the 2023 LHC run with heavy-ion collisions

The LHC schedule for 2023 has been revised following the emergence of a leak in mid-July. The decision was to stop the regular proton running this year and focus on the heavy ion physics that was already scheduled for the year-end. This was…

The CMS Trigger System for Run 3

Before the start of the LHC Run 3, CMS improved many aspects of its trigger system in order to boost the physics reach of the experiment. To select events of potential physics interest, the CMS trigger system divides the processing into two levels:…

A word from the DIRAC and Rucio Workshop 2023

DIRAC and Rucio are two software projects used for scientific computing. Both projects are led by CERN, and the EP department is one of the major contributors to both. DIRAC is used by CERN experiments such as LHCb, CLIC, FCC, NA62, and non-…

Jet Substructure as a powerful probe of Quantum Chromodynamics

Jet substructure (JSS) has emerged as a powerful framework for studying the Standard Model (SM) and provides a key set of tools for probing nature at the highest energy scales accessible by terrestrial experiments. While not an…

Problems and Solutions: The CMS ECAL lessons

The story starts in September 2022 while, during the ECAL Operations meeting our veteran electronics expert, Evgueni Vlassov reported that the voltage in one of the control cards was unstable. He prophetically proposed that the cause might be water…

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