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Polarization observables in WZ production at the 13 TeV LHC: Inclusive case (1910.13746v2)

Published 30 Oct 2019 in hep-ph and hep-ex

Abstract: We present a study of the polarization observables of the $W$ and $Z$ bosons in the process $p p \to W\pm Z\to e\pm \nu_e \mu+\mu-$ at the 13 TeV Large Hadron Collider. The calculation is performed at next-to-leading order, including the full QCD corrections as well as the electroweak corrections, the latter being calculated in the double-pole approximation. The results are presented in the helicity coordinate system adopted by ATLAS and for different inclusive cuts on the di-muon invariant mass. We define left-right charge asymmetries related to the polarization fractions between the $W+ Z$ and $W- Z$ channels and we find that these asymmetries are large and sensitive to higher-order effects. Similar findings are also presented for charge asymmetries related to a P-even angular coefficient.

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