Evidence for electroweak production of two jets in association with a $Z\gamma$ pair in $pp$ collisions at $\sqrt{s} = 13$ TeV with the ATLAS detector

Understand

Evidence for electroweak production of two jets in association with a $Z\gamma$ pair in $\sqrt{s} = 13$ TeV proton$-$proton collisions at the Large Hadron Collider is presented.

• The analysis uses data collected by the ATLAS detector in $2015$ and $2016$ that corresponds to an integrated luminosity of $36.1~\mathrm{fb}^{-1}$.
• Events that contain a $Z$ boson candidate decaying leptonically into either $e^{+}e^{-}$ or $\mu^{+}\mu^{-}$, a photon, and two jets are selected.
• The electroweak component is measured with observed and expected significances of $4.1$ standard deviations.