The power of position: aligning the ATLAS muon spectrometer
Experiment Briefing | 04 Mar 2021
ATLAS: now under new management
News | 02 Mar 2021
Planning an event during a pandemic
Blog | 19 Feb 2021
Students step into the limelight: ATLAS awards excellent PhD theses
News | 17 Feb 2021
ATLAS recognises the outstanding achievements of Collaboration members
News | 16 Feb 2021
ATLAS finds evidence of a rare Higgs boson Dalitz decay to two leptons and a photon
Physics Briefing | 02 Feb 2021
Teaching university students with real ATLAS data
Blog | 27 Jan 2021
2020: an unprecedented year in review
News | 06 Jan 2021
Studying the Higgs boson in its most common – yet uncommonly challenging – decay channel
Physics Briefing | 01 Dec 2020
ATLAS Live talk: How elementary particles are detected with Prof. Daniela Bortoletto
News | 27 Nov 2020
ATLAS releases new open software
The ATLAS Collaboration has just released a collection of 200 software packages that make up the Trigger and Data Acquisition System (TDAQ). With this new release, most ATLAS software is now open – reinforcing the Collaboration’s ongoing commitment to open science.
News | 20 Nov 2020
Refining the picture of the Higgs boson
A new result from the ATLAS Collaboration, released for the Higgs 2020 conference, aims at enriching the Higgs picture by studying its WW* decays.
Physics Briefing | 19 Nov 2020
ATLAS Live talk: Searching for Dark Matter with Dr. Christian Ohm
News | 31 Oct 2020
ATLAS uses the Higgs boson as a tool to search for Dark Matter
One of the great unexplained mysteries is the nature of dark matter. So far, its existence has only been established through gravitational effects observed in space; no dark-matter particles with the needed properties have (yet) been detected. Could the Higgs boson be the key to their discovery?
Physics Briefing | 29 Oct 2020
Higgs boson probes for new phenomena
ATLAS scientists are implementing a new strategy in the search for physics beyond the Standard Model – one that combines measurements across the full spectrum of the Collaboration's research programme.
Physics Briefing | 28 Oct 2020
Leptons at a distance: a new search for long-lived particles
ATLAS researchers are broadening their extensive search programme to look for more unusual signatures of unknown physics, such as long-lived particles. A theory that naturally motivates long-lived particles is supersymmetry (SUSY). A new search from the ATLAS Collaboration – released this week for the 5th International Conference on Particle Physics and Astrophysics (ICPPA-2020) – looks for the superpartners of the electron, muon and tau lepton
Physics Briefing | 07 Oct 2020
Unraveling Nature's secrets: vector boson scattering at the LHC
In 2017, the ATLAS and CMS Collaborations announced the detection of a never-before-observed process: vector boson scattering.
Feature | 22 Sep 2020
Exploring the “coolest” mock-up
It was in 2014, just a few months after my transition from ALICE to ATLAS, that I saw the mock-up for the first time: a full-scale wooden reproduction of the central portion of the ATLAS experiment, measuring some 8 metres high and wide.
Blog | 10 Sep 2020
Z bosons zoom through quark–gluon plasma as jets quench
With new data from the LHC, ATLAS physicists have measured jet-quenching phenomena in the quark–gluon plasma with help of Z bosons.
Physics Briefing | 25 Aug 2020
ATLAS highlights presented at the world's largest particle-physics conference
As major players in the field of particle physics, the LHC collaborations contributed many new results, most of which exploited the full Run 2 dataset, recorded in 2015 to 2018. ATLAS physicists contributed 35 new results, and gave 85 talks in the parallel and plenary sessions. Their contributions spanned a wide range of topics, from precision measurements and searches for new phenomena to detector performance and R&D, as well as diversity and outreach.
News | 08 Aug 2020
Rare phenomenon observed by ATLAS features the LHC as a high-energy photon collider
During the International Conference on High-Energy Physics (ICHEP 2020), the ATLAS Collaboration presented the first observation of photon collisions producing pairs of W bosons, elementary particles that carry the weak force, one of the four fundamental forces. The result demonstrates a new way of using the LHC, namely as a high-energy photon collider directly probing electroweak interactions. It confirms one of the main predictions of electroweak theory – that force carriers can interact with themselves – and provides new ways to probe it.
Press Statement | 05 Aug 2020
ATLAS observes W-boson pair production from light colliding with light
The ATLAS Collaboration has announced the first observation of two W bosons produced from the scattering of two photons — particles of light – at the International Conference on High-Energy Physics (ICHEP 2020).
Physics Briefing | 05 Aug 2020
CERN experiments announce first indications of a rare Higgs boson process
The ATLAS and CMS experiments at CERN announce new results which show that the Higgs boson decays into two muons. These new results have pivotal importance for fundamental physics because they indicate for the first time that the Higgs boson interacts with second-generation elementary particles.
Press Statement | 03 Aug 2020
New ATLAS result marks milestone in the test of Standard Model properties
The ATLAS Collaboration has released a new study into a key building block of matter: leptons. This type of particle comes in three different families (flavours) and, according to the Standard Model, should follow strict rules. For instance, except for their mass, leptons of different flavours have identical properties – a feature known as lepton flavour universality. This was recently corroborated by a key measurement of the W-boson decay rates into leptons by the ATLAS Collaboration.
Physics Briefing | 03 Aug 2020
New measurements of the Higgs boson find strength in unity
Physicists can study Higgs-boson couplings in several ways: by measuring the rates of different Higgs boson production mechanisms and decays, and also by studying the particle’s kinematic properties. The ATLAS Collaboration has just presented precise new measurements of these key quantities. Several of these measurements were updated to use the full LHC Run 2 dataset (2015–2018), to provide the best precision to date.
Physics Briefing | 31 Jul 2020