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- W4309395500 abstract "Measurements of joint-polarisation states of $W$ and $Z$ gauge bosons in $W^{pm}Z$ production are presented. The data set used corresponds to an integrated luminosity of $139$ fb$^{-1}$ of proton-proton collisions at a center-of-mass energy of $13$ TeV recorded by the ATLAS detector at the CERN Large Hadron Collider. The $W^{pm}Z$ candidate events are reconstructed using leptonic decay modes of the gauge bosons into electrons and muons. The simultaneous pair-production of longitudinally polarised vector bosons is measured for the first time with a significance of $7.1$ standard deviations. The measured joint helicity fractions integrated over the fiducial region are $f_{mathrm{00}} = 0.067 pm 0.010$, $f_{mathrm{0T}} = 0.110 pm 0.029$, $f_{mathrm{T0}} = 0.179 pm 0.023$ and $f_{mathrm{TT}} = 0.644 pm 0.032$, in agreement with the next-to-leading-order Standard Model predictions. Individual helicity fractions of the $W$ and $Z$ bosons are also measured and found to be consistent with joint helicity fractions within the expected amount of correlations. Both the joint and individual helicity fractions are also measured separately in $W^+Z$ and $W^-Z$ events. Inclusive and differential cross sections for several kinematic observables sensitive to polarisation are presented." @default.
- W4309395500 created "2022-11-26" @default.
- W4309395500 creator A5086903549 @default.
- W4309395500 date "2022-11-17" @default.
- W4309395500 modified "2023-10-16" @default.
- W4309395500 title "Observation of gauge boson joint-polarisation states in $W^{pm}Z$ production from $pp$ collisions at $sqrt{s} = 13$ TeV with the ATLAS detector" @default.
- W4309395500 doi "https://doi.org/10.48550/arxiv.2211.09435" @default.
- W4309395500 hasPublicationYear "2022" @default.
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