CERN Accelerating science

ATLAS

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…

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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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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…

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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…

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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…

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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…

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ATLAS New Small Wheel upgrade advances

The ATLAS New Small Wheel (NSW) upgrade is an ambitious project that will allow exploiting the physics opportunities of the HL-LHC. Last November, the second -and final- NSW was installed in the ATLAS detector, marking the successful outcome of…

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ATLAS prepares for Run 3 as protons are back in the LHC

Since the start of LS2, ATLAS has undergone an intense maintenance and consolidation programme to meet the challenges of Run 3 of the LHC, and fully exploit the available physics opportunities. This includes the installation and commissioning of…

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A High-Granularity Timing Detector for the ATLAS Phase-II Upgrade

A High-Granularity Timing Detector (HGTD) using Low Gain Avalanche Diodes (LGAD) silicon sensors is being constructed for the ATLAS phase-II upgrade program as a powerful way to address the challenges of the High-Luminosity LHC program [1]. The goal…

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Higgs boson and the quest for new physics

The discovery of a new particle in 2012 by the ATLAS and CMS experiments at CERN was just the beginning in understanding the properties of this particle and its potential link to some of the most pressing fundamental questions in modern physics.…

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