Measurement of the photon and jet production with the ATLAS detector

Production of prompt isolated photons at hadron colliders provides a probe of perturbative QCD and can be used to study the gluon density function of the proton. The ATLAS collaboration has performed precise measurements of the inclusive production of isolated prompt photons in 20.2 fb${}^{-1}$ of data collected at $\sqrt{s}=8$ TeV and in 6.4 pb${}^{-1}$ of data collected at $\sqrt{s}=13$ TeV. The measurements are compared with state-of-the-art theory predictions at NLO in QCD and with predictions of several MC generators. Production of inclusive jets at hadron colliders also provides a probe of perturbative QCD. The inclusive jet production cross-section was measured in 78 pb${}^{-1}$ of data collected at $\sqrt{s}=13$ TeV. Results have been compared with (state-of-the-art) theory predictions at NLO in QCD, interfaced with different parton distribution functions.