ATLAS
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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ATLAS New Small Wheel upgrade advances
Group photo after the installation of the last sector of NSW-A. On the right is NSW-C with the first three sectors installed at the time. The New Small Wheel (NSW) upgrade is an ambitious project that aims to allow, along with other upgrade projects…
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Mighty magnets for particle detectors
The ATLAS Magnet Team, part of the EP-ADO-SO section, has the principal responsibility for the maintenance and operation of the ATLAS Superconducting Magnets. This effort is supported by a large number of colleagues, in particular from EP-DT, TE-CRG…
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LHC takes on the SMEFT challenge
The quest for new physics at the LHC is entering a new phase: the experiments are designing new strategies to target potential deviations from the Standard Model (SM) predictions in a systematic way, to complement the traditional “bump hunts” and,…
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ATLAS faces the challenge of Run 3
The ATLAS experiment is a general-purpose particle detector operating at the LHC. It consists of several concentric layers of particle detectors occupying a cylindrical volume 46m long and 25m in diameter. The innermost detectors reconstruct the…
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The likelihood is dead, long live the likelihood
Among the sciences, particle physics has the luxury of having a well established theoretical basis. Often we focus on the elementary particles and model them mathematically with quantum field theories like the Standard Model. In order to compare…
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