Differential cross-section measurements for the electroweak production of dijets in association with a $Z$ boson in proton-proton collisions at ATLAS

The ATLAS collaboration
Aad, Georges , Abbott, Brad , Abbott, Dale Charles , Abed Abud, Adam , Abeling, Kira , Abhayasinghe, Deshan Kavishka , Abidi, Syed Haider , Abouzeid, Ossama , Abraham, Nicola , Abramowicz, Halina
Eur.Phys.J.C 81 (2021) 163, 2021.

Abstract (data abstract)
CERN-LHC. Differential cross-section measurements for the electroweak production of two jets in association with a $Z$ boson. These measurements are sensitive to the vector-boson fusion production mechanism and provide a fundamental test of the gauge structure of the Standard Model. The analysis is performed using proton-proton collision data collected by ATLAS at a centre-of-mass energy of 13 TeV and an integrated luminosity of 139 fb$^{-1}$. The differential cross-sections are measured in the $Z \to \ell\ell$ decay channel ($\ell = e,mu$) as a function of four observables: the dijet invariant mass $m_{jj}$, the rapidity interval spanned by the two jets $|\Delta y_{jj}|$, the signed azimuthal angle between the two jets $\Delta\phi_{jj}$, and the transverse momentum of the dilepton pair $p_{\mathrm{T},\ell\ell}$. The data are corrected for the effects of detector inefficiency and resolution. The definition of the fiducial region can be found in Table 3 of the paper and are applied in the associated Rivet routine.

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