03001oam 2200469 450 99641843290331620210417084126.03-030-57016-910.1007/978-3-030-57016-3(CKB)4100000011558629(DE-He213)978-3-030-57016-3(MiAaPQ)EBC6384531(PPN)252508181(EXLCZ)99410000001155862920210417d2020 uy 0engurnn|008mamaatxtrdacontentcrdamediacrrdacarrierElectroweak physics at the large hadron collider with the atlas detector standard model measurement, supersymmetry searches, excesses, and upgrade electronics /Elodie Resseguie1st ed. 2020.Cham, Switzerland :Springer,[2020]©20201 online resource (XXIII, 322 p. 227 illus., 212 illus. in color.) Springer theses"Doctoral Thesis accepted by University of Pennsylvania, Philadelphia, USA"--Title page.3-030-57015-0 Introduction -- Theoretical Framework -- LHC and the ATLAS Detector -- HL-LHC Inner Detector Upgrade -- W±Z Cross-Section Measurement at ps = 13 TeV -- Searches for Electroweak SUSY: Motivation and Models -- Search for wino-bino production decaying via WZ at ps = 13 TeV.This thesis discusses searches for electroweakly produced supersymmetric partners of the gauge and the Higgs bosons (gauginos and higgsinos) decaying to multiple leptons, using pp collisions at sqrt(s) = 13 TeV. The thesis presents an in-depth study of multiple searches, as well as the first 13 TeV cross section measurement for the dominant background in these searches, WZ production. Two searches were performed using 36.1/fb of data: the gaugino search, which makes use of a novel kinematic variable, and the higgsino search, which produced the first higgsino limits at the LHC. A search using 139/fb of data makes use of a new technique developed in this thesis to cross check an excess of data above the background expectation in a search using a Recursive Jigsaw Reconstruction technique. None of the searches showed a significant excess of data, and limits were expanded with respect to previous results. These searches will benefit from the addition of luminosity during HL-LHC; however, the current detector will not be able to withstand the increase in radiation. Electronics for the detector upgrade are tested and irradiated to ensure their performance.Springer theses.Particles (Nuclear physics)Particles (Nuclear physics)539.721Resseguie Elodie842129MiAaPQMiAaPQUtOrBLWBOOK996418432903316Electroweak Physics at the Large Hadron Collider with the ATLAS Detector1879553UNISA