======================================== April 25th 2018 - Journal club meeting minutes ======================================== New topic: WW scattering - 8 TeV ATLAS paper. Cesar chairs. As this paper requires a lot of thought to understand the theory, in this session we mostly stuck to drawing Feynman diagrams and discussing the different SR (Signal Regions). ------------ Topics: ------------ * How is VBS defined exactly? * Exhaustive list of Feynman diagrams * VVVV vertex * VBS diagrams are not seperately gauge invariant * Why does strong production not dominate VBS? * Why did they use leptonic signatures? * Where do the selection criteria come from? Questions * Standard model breaks without higgs * Unitarity was well explained but not necessarily motivated for this study See mattermost for more discussion & Feynman diagrams 😃 *************************************** Next week: Two week hiatus for exams ***************************************