ATLAS - A Toroidal LHC ApparatuS
ATLAS is a gigantic experimental apparatus, deployed 100 m underground near Genève, at the crossing of the CERN LHC beams. ATLAS is one of the two experiments which discovered the Higgs boson in 2012. Now it is focused on the most important open issues of High Energy Physics.
As high as an 8 floors building and twice as long, ATLAS weighs 7000 tons and it is operated by more than 3000 scientists. Together with its “little cousin” CMS, ATLAS hit the headlines in 2012, when it announced to the world the discovery of the Higgs boson, a key element to verify the namesake mechanism, for which fundamental particles get mass. Besides the Higgs boson, ATLAS is focused on a number of open issues in High Energy Physics, for instance:
• study of parton‐parton processes foreseen by the Standard Model, to characterize TeV dynamics and look for unexpected effects;
• search for New Physics, beyond the Standard Model, be it Supersymmetry or something else predicted by some extension of the electroweak lagrangian;
• study of the top quark, the heaviest one, for which coupling to New Physics are often recognized to be the most probable.
Since 2007 the Department of Industrial Engineering of Trento coordinated the ATLAS working group for developing the innovative 3D pixel sensor technology, now mounted on the ATLAS Insertable B‐layer and perfectly working. Since 2016 the Trento‐TIFPA group contributes also to monitor the pixel (and IBL) operation . It is also involved in R&D for the 3D second generation sensors (for the High Luminosity LHC, ATLAS phase 2).
On the analysis side, the Trento‐TIFPA group contributes to the search for New Physics in diboson decays (2HDM, HVT and RD‐graviton models), applying AI‐based techniques (BDTs, machine learing, etc…).
• Local responsible for TIFPA: Gian-Franco Dalla Betta
• Involved TIFPA people: Francesco Maria Follega, Roberto Iuppa, Ester Ricci, DMS Sultan
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