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ATLAS Experiment
121,592 followers -
particles, physics, higgs, collider
particles, physics, higgs, collider

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[ATLAS News] Meet the talented recipients of the ATLAS PhD Grant
Now in its fourth year, the ATLAS PhD Grant gives doctoral students an opportunity to benefit from world-class research, supervision and training within the ATLAS collaboration. #CERNandSociety

https://atlas-public.web.cern.ch/updates/atlas-news/meet-talented-recipients-atlas-phd-grant

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Le livre de coloriage de l'expérience ATLAS - maintenant disponible en français ! http://atlas.cern/colouring-book
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How strange is the proton?

New precision measurements of the W and Z boson cross sections show the proton contains more strange quarks than previously believed.

"The protons collided by the LHC are not elementary particles, but are instead made up of quarks, antiquarks and gluons. The theory of the strong interactions – quantum chromodynamics (QCD) – does not allow physicists to calculate the composition of protons from first principles. However, QCD can connect measurements made in different processes and at different energy scales such that universal “parton density functions” (PDFs) can be extracted. These determine the dynamic substructure of the proton..."

https://atlas.cern/updates/physics-briefing/how-strange-proton


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Return of the top quark!

Measuring the kinematics of the top quark in dilepton events at 13 TeV

"Whether you’re searching for new physics or testing the latest predictions in quantum chromodynamics (QCD), direct measurements of the kinematics of the top quark and the top-antitop (tt̅) system are vitally important to particle physics. In recent years, results from the ATLAS experiment have directly challenged the predictions from QCD at Next-to-Leading-Order (NLO) by showing that, at collision energies of 7 TeV and 8 TeV, nature prefers top quarks with a smaller transverse momentum than our theory predicts. Now ATLAS physicists are asking: is this also the case at 13 TeV?"

https://atlas.cern/updates/physics-briefing/return-top-quark

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View of the ATLAS control room and Globe of Science and Innovation at CERN, after the first snowfall of 2017.
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ATLAS Physicist James Beacham describes our search for extra dimensions at TEDxBerlin.

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Become a Higgs Hunter

The citizen science platform releases its first paper.

https://atlas.cern/updates/atlas-news/become-higgs-hunter

#citzenscience

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Lots of beautiful data collected this year! Thank you, LHC!

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