@article{Redelbach2015, author = {Redelbach, Andreas}, title = {Searches for prompt R-parity-violating supersymmetry at the LHC}, series = {Advances in High Energy Physics}, volume = {2015}, journal = {Advances in High Energy Physics}, number = {982167}, doi = {10.1155/2015/982167}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-149149}, year = {2015}, abstract = {Searches for supersymmetry (SUSY) at the LHC frequently assume the conservation of R-parity in their design, optimization, and interpretation. In the case that R-parity is not conserved, constraints on SUSY particle masses tend to be weakened with respect to R-parity-conserving models. We review the current status of searches for R-parity-violating (RPV) supersymmetry models at the ATLAS and CMS experiments, limited to 8 TeV search results published or submitted for publication as of the end of March 2015. All forms of renormalisable RPV terms leading to prompt signatures have been considered in the set of analyses under review. Discussing results for searches for prompt R-parity-violating SUSY signatures summarizes the main constraints for various RPV models from LHC Run I and also defines the basis for promising signal regions to be optimized for Run II. In addition to identifying highly constrained regions from existing searches, also gaps in the coverage of the parameter space of RPV SUSY are outlined.}, language = {en} } @article{OPUS4-22540, title = {Measurement of the production cross-section of a single top quark in association with a \(Z\) boson in proton-proton collisions at 13 TeV with the ATLAS detector}, series = {Physics letters B}, volume = {780}, journal = {Physics letters B}, organization = {The ATLAS Collaboration}, doi = {10.1016/j.physletb.2018.03.023}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-225406}, pages = {557-577}, year = {2018}, abstract = {The production of a top quark in association with a Z boson is investigated. The proton-proton collision data collected by the ATLAS experiment at the LHC in 2015 and 2016 at a centre-of-mass energy of root s = 13 TeV are used, corresponding to an integrated luminosity of 36.1 fb(-1). Events containing three identified leptons (electrons and/or muons) and two jets, one of which is identified as a b-quark jet are selected. The major backgrounds are diboson, tt(\$)over-bar and Z + jets production. A neural network is used to improve the background rejection and extract the signal. The resulting significance is 4.2 sigma in the data and the expected significance is 5.4 sigma. The measured cross-section for tZq production is 600 +/- 170(stat.)+/- 140(syst.)fb. (C) 2018 The Author(s). Published by Elsevier B.V.}, language = {en} }