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Measurements of production cross sections of polarized same-sign W boson pairs in association with two jets in proton-proton collisions at $\sqrt{s} =$ 13 TeV
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abstract
The first measurements of production cross sections of polarized same-sign W$^\pm$W$^\pm$ boson pairs in proton-proton collisions are reported. The measurements are based on a data sample collected with the CMS detector at the LHC at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 137 fb$^{-1}$. Events are selected by requiring exactly two same-sign leptons, electrons or muons, moderate missing transverse momentum, and two jets with a large rapidity separation and a large dijet mass to enhance the contribution of same-sign W$^\pm$W$^\pm$ scattering events. An observed (expected) 95% confidence level upper limit of 1.17 (0.88) fb is set on the production cross section for longitudinally polarized same-sign W$^\pm$W$^\pm$ boson pairs. The electroweak production of same-sign W$^\pm$W$^\pm$ boson pairs with at least one of the W bosons longitudinally polarized is measured with an observed (expected) significance of 2.3 (3.1) standard deviations.
Forward citations
Cited by 3 Pith papers
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Evidence for longitudinally polarised $Z$ bosons in electroweak $W^{\pm}Z$ production in association with two jets from $pp$ collisions at $\sqrt{s} = $ 13 TeV and 13.6 TeV with the ATLAS detector
First measurement of the fraction of longitudinally polarised Z bosons in electroweak WZ+two-jet production: f_X0 = 0.32 ± 0.09, a 4.0σ signal consistent with the Standard Model.
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The Four Polarizations of the $W$ at High Energies
Polarization interference in intermediate W bosons is generically nonzero even on-shell, can exceed width-over-mass corrections at low energies, and is suppressed at LHC energies; a 2P scheme is proposed to reduce gau...
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Proposed measurement of longitudinally polarised vector bosons in $WH$ and $ZH$ production at Hadron colliders
Simulation-based projections show longitudinally polarised W bosons in WH production could be measured at 5-sigma significance with 300 fb^-1 at the LHC.
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