ATLAS is one of the four big experiments at CERN that exploits the full potential of discovery provided by the large hadron collider - LHC. The LIP Portuguese group signed the Letter of Intent of ATLAS and had a significant role in the design, construction, start-up of operations, trigger and data acquisition systems. The main contributions were to the hadronic calorimeter TileCal, to the forward detectors, and to the software development for jet trigger signatures. The group is contributing to detector performance studies and physics data analyses since the very first data provided by the LHC. In parallel, the group is strongly involved in the ATLAS upgrade efforts in view of operating during the High-Luminosity LHC phase, developing work mostly in TileCal and Trigger.
The ATLAS Portuguese group contributed to the discovery of the Higgs boson and is currently studying its properties. The group is a reference in the studies of the top quark and exploits this expertise in the search for physics beyond the standard model. It is also leader in exotics states studies. Last but not the least, the group is involved in the Heavy Ion program of the LHC, contributing to the study of the quark-gluon plasma (QGP), the state of matter that has occurred just after the Big Bang.
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Study of interference effects in the search for flavour-changing neutral current interactions involving the top quark and a photon or a Z boson at the LHC
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Author(s): Maura Barros, Nuno Filipe Castro, Johannes Erdmann, Gregor Gebner, Kevin Kroninger, Salvatore La Cagnina, Ana Peixoto
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Submission: 2019-09-18, Acceptance: 2020-03-17, Publication: 2020-03-30
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Reference: Eur. Phys. J. Plus 135 (2020) 339
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Combination of searches for Higgs boson pairs in pp collisions at root s=13 TeV with the ATLAS detector
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Author(s): ATLAS Collaboration (2911 authors)
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Submission: 2020-01-10, Acceptance: 2020-01-10, Publication: 2020-01-10
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Reference: Phys. Lett. B 800 (2020) 135103
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Searches for lepton-flavour-violating decays of the Higgs boson in root s=13 TeV pp collisions with the ATLAS detector
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Author(s): ATLAS Collaboration (2919 authors)
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Submission: 2020-01-10, Acceptance: 2020-01-10, Publication: 2020-01-10
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Reference: Phys. Lett. B 800 (2020) 135069
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Search for flavour-changing neutral currents in processes with one top quark and a photon using 81 fb(-1) of pp collisions at root s=13 TeV with the ATLAS experiment
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Author(s): ATLAS Collaboration (2932 authors)
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Submission: 2020-01-10, Acceptance: 2020-01-10, Publication: 2020-01-10
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Reference: Phys. Lett. B 800 (2020) 135082










