@article{OPUS4-22651, title = {Search for photonic signatures of gauge-mediated supersymmetry in 13 TeV \(pp\) collisions with the ATLAS detector}, series = {Physical Review D}, volume = {97}, journal = {Physical Review D}, organization = {The ATLAS Collaboration}, doi = {10.1103/PhysRevD.97.092006}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-226510}, pages = {1-32}, year = {2018}, abstract = {A search is presented for photonic signatures, motivated by generalized models of gauge-mediated supersymmetry breaking. This search makes use of proton-proton collision data at root s = 13 TeV corresponding to an integrated luminosity of 36.1 fb(-1) recorded by the ATLAS detector at the LHC, and it explores models dominated by both strong and electroweak production of supersymmetric partner states. Experimental signatures incorporating an isolated photon and significant missing transverse momentum are explored. These signatures include events with an additional photon or additional jet activity not associated with any specific underlying quark flavor. No significant excess of events is observed above the Standard Model prediction, and 95\% confidence-level upper limits of between 0.083 and 0.32 fb are set on the visible cross section of contributions from physics beyond the Standard Model. These results are interpreted in terms of lower limits on the masses of gluinos, squarks, and gauginos in the context of generalized models of gauge-mediated supersymmetry, which reach as high as 2.3 TeV for strongly produced and 1.3 TeV for weakly produced supersymmetric partner pairs.}, language = {en} } @article{OPUS4-22070, title = {Search for supersymmetry in events with four or more leptons in root s=13 TeV \({pp}\) collisions with ATLAS}, series = {Physical Review D}, volume = {98}, journal = {Physical Review D}, number = {3}, organization = {The ATLAS Collaboration}, doi = {10.1103/PhysRevD.98.032009}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-220705}, pages = {1-31}, year = {2018}, abstract = {Results from a search for supersymmetry in events with four or more charged leptons (electrons, muons and taus) are presented. The analysis uses a data sample corresponding to 36.1 fb(-1) of proton-proton collisions delivered by the Large Hadron Collider at root s = 13 TeV and recorded by the ATLAS detector. Four-lepton signal regions with up to two hadronically decaying taus are designed to target a range of supersymmetric scenarios that can be either enriched in or depleted of events involving the production and decay of a Z boson. Data yields are consistent with Standard Model expectations and results are used to set upper limits on the event yields from processes beyond the Standard Model. Exclusion limits are set at the 95\% confidence level in simplified models of general gauge mediated supersymmetry, where Higgsino masses are excluded up to 295 GeV. In R-parity-violating simplified models with decays of the lightest supersymmetric particle to charged leptons, lower limits of 1.46, 1.06, and 2.25 TeV are placed on wino, slepton and gluino masses, respectively.}, language = {en} } @article{OPUS4-22083, title = {Search for squarks and gluinos in final states with jets and missing transverse momentum using 36 fb\(^{-1}\) of root s=13 TeV \({pp}\) collision data with the ATLAS detector}, series = {Physical Review D}, volume = {97}, journal = {Physical Review D}, number = {11}, organization = {The ATLAS Collaboration}, doi = {10.1103/PhysRevD.97.112001}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-220835}, pages = {1-47}, year = {2018}, abstract = {A search for the supersymmetric partners of quarks and gluons (squarks and gluinos) in final states containing hadronic jets and missing transverse momentum, but no electrons or muons, is presented. The data used in this search were recorded in 2015 and 2016 by the ATLAS experiment in root s = 13 TeV proton-proton collisions at the Large Hadron Collider, corresponding to an integrated luminosity of 36.1 fb(-1). The results are interpreted in the context of various models where squarks and gluinos are pair produced and the neutralino is the lightest supersymmetric particle. An exclusion limit at the 95\% confidence level on the mass of the gluino is set at 2.03 TeV for a simplified model incorporating only a gluino and the lightest neutralino, assuming the lightest neutralino is massless. For a simplified model involving the strong production of mass-degenerate first-and second-generation squarks, squark masses below 1.55 TeVare excluded if the lightest neutralino is massless. These limits substantially extend the region of supersymmetric parameter space previously excluded by searches with the ATLAS detector.}, language = {en} }