Speaker
展航 周
Description
This proposal describes measurements of the polarised same-sign W boson pairs with 140 fb^-1 of data recorded at 13 TeV central energy by the ATLAS detector at the LHC. The analysis selects a pair of same-sign leptons produced in association with two jets.The selected jet pair is required to have a large invariant mass and a significant rapidity gap. Machine learning methods are used to extract polarisation fractions, including at least one longitudinally W boson and the doubly polarised longitudinal W boson pair, in both the WW and partonic centre-of-mass reference frames.
