Polarization Observables in WZ Production at the 13 TeV LHC: Inclusive Case
2020; Publishing House For Science And Technology; Volume: 30; Issue: 1 Linguagem: Inglês
10.15625/0868-3166/30/1/14461
ISSN2815-5947
Autores Tópico(s)Quantum Chromodynamics and Particle Interactions
ResumoWe 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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