Evidence for electroweak production of four charged leptons and two jets in proton-proton collisions at <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.svg"><mml:msqrt><mml:mrow><mml:mi>s</mml:mi></mml:mrow></mml:msqrt><mml:mo linebreak="goodbreak" linebreakstyle="after">=</mml:mo><mml:mn>13</mml:mn><mml:mspace width="0.2em" /><mml:mtext>TeV</mml:mtext></mml:math>

Evidence is presented for the electroweak (EW) production of two jets (jj) in association with Z bosons and constraints on anomalous quartic gauge couplings are set. The analysis based a data sample proton-proton collisions at s=13TeV collected CMS detector 2016–2018, corresponding to an integrated luminosity 137fb?1. search performed fully leptonic final state ZZ???????, where ?,??=e,?. EW measured observed (expected) significance 4.0 (3.5) standard deviations. cross sections three fiducial volumes result ?EW(pp?ZZjj???????jj)=0.33?0.10+0.11(stat)?0.03+0.04(syst)fb most inclusive volume, agreement model prediction 0.275±0.021fb. Measurements total jj also reported. Limits derived terms effective field theory operators T0, T1, T2, T8, T9.