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Measurement of inclusive dijet cross-sections in proton-proton collisions at $\sqrt{s} = 13$ TeV with the ATLAS detector

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Inclusive dijet cross-sections have been measured in proton-proton collisions at a centre-of-mass energy of 13 TeV using data with an integrated luminosity of 140 fb$^{-1}$, recorded by the ATLAS detector at the Large Hadron Collider during 2015-2018. Jets are identified using the anti-$k_t$ algorithm with a radius parameter of $R = 0.4$. The inclusive dijet double-differential cross-sections are measured first as a function of the invariant dijet mass and the half absolute rapidity separation between the two leading jets ($m_\mathrm{jj}$, $y$*), and second as a function of the invariant dijet mass and the total longitudinal boost of the dijet system ($m_\mathrm{jj}$, $y_\mathrm{boost}$). The measured dijet system covers the invariant mass range from 240 GeV to almost 10 TeV, with dijet separation $y$* < 3.0 and dijet boost $y_\mathrm{boost}$ < 3.0. The results are unfolded to the particle level and compared with state-of-the-art next-to-next-to-leading-order full-colour perturbative QCD calculations, corrected for non-perturbative and electroweak effects.

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Sujets associés

Particle physics theoretical and experimental studiesHigh-Energy Particle Collisions ResearchParticle Detector Development and Performance

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