Tag: ATLAS
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New ATLAS result weighs in on the W boson
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 its mass (mW) are testing the
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ATLAS Tile Calorimeter Phase II Upgrade: entering production phase.
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 long R&D period and many design
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ATLAS resumes operation after LS2 shutdown
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 first time at the
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Upgrading the ATLAS Level-1 Central Trigger
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, muon and forward detectors which arrives at the bunch crossing rate of 40
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The long hunt for the Higgs boson
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 also Higgs-boson adventures at LEP and at the
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Solving New Puzzles with the Higgs Boson
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 Higgs boson, but
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ATLAS and CMS experiments looking forward to Run 3
ATLAS and CMS experiments looking forward to Run 3 On the 4th of July of 2022 we celebrated the 10th anniversary of the end of decades-long search for an experimental confirmation of the BEH mechanism, and the start of a new era. With the discovery of the Higgs boson, the last unknown fundamental parameter of
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LHC experiments restart
LHC experiments restart The LHC restarted this summer, after a period of upgrades (LS2) and is gearing up to probe new realms of physics during a third run, which will be its most powerful yet. Run 3 of the LHC will feature higher-energy particle beams and higher collision rates, allowing physicists to collect more data
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Start up of the ATLAS and CMS magnets
Start up of the ATLAS and CMS magnets LS2 works and commissioning of the ATLAS Superconducting Magnets In the last few years, the ATLAS superconducting magnets and associated systems have received extensive maintenance and upgrades. Following this, the magnets have recently been successfully commissioned and are now running at nominal current. During LS2, the ATLAS
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What is the W boson mass trying to tell us?
What is the W boson mass trying to tell us? Introduction In April this year the CDF collaboration shocked the particle physics world with a new measurement of the mass of the W boson particle [1], with a precision better than all previous results combined, and a value of the W mass higher than the