ATLAS

Triggering in ATLAS in Run 3

The ATLAS collaboration recently celebrated its 30th anniversary following the submission of the experiment’s Letter of Intent in 1992 and has accomplished great achievements during these years. However, it is still a young experiment, with only 6%…

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…

ATLAS gears up for Run 3 physics results

Who breaks Electroweak symmetry? It sounds like a simple question and the Standard Model of Particle Physics, the prevailing theory for the last half century, has a simple answer - it’s the Higgs. The Standard Model theory predicts that the Higgs…

New ATLAS result weighs in on the W boson

For the past 40 years, the W boson has been making headlines. In the 1980s, the announcement of its discovery helped confirm the theory of the electroweak interaction – a unified description of electromagnetic and weak forces. Today, measurements of…

ATLAS Tile Calorimeter Phase II Upgrade: entering production phase.

The start of the High Luminosity LHC is approaching at a fast pace. In order to be ready with its upgraded front-end electronics and data acquisition systems, ATLAS Tile Calorimeter (TileCal) community is now entering the production phase, after a…

ATLAS resumes operation after LS2 shutdown

This year saw the long-anticipated start of the LHC Run 3, and the excitement was tangible in the ATLAS control room during the afternoon of the 5th of July when the LHC proton beams were expected to be brought into stable beam collisions, for the…

Upgrading the ATLAS Level-1 Central Trigger

The ATLAS trigger system consists of a first-level trigger based on custom electronics and firmware, and a high-level software trigger (HLT) running on off-the-shelf hardware. The first level trigger (see Figure 1) uses information from calorimeters…

The long hunt for the Higgs boson

An essay about the Higgs boson ten years after its discovery? Already ten years? This unique adventure has left indelible memories to the thousands of people who have been instrumental in giving birth to this wonderful discovery. There have been…

Solving New Puzzles with the Higgs Boson

… to make an end is to make a beginning. The end is where we start from. T.S. Eliot, Little Gidding You might think that particle physics has accomplished its goals with the discovery of the last piece of the Standard Model jigsaw puzzle, the…

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