Measurement of the $Z(\rightarrow\ell^+\ell^-)\gamma$ production cross-section in $pp$ collisions at $\sqrt{s} =13$ TeV with the ATLAS detector
Measurement of the $Z(\rightarrow\ell^+\ell^-)\gamma$ production cross-section in $pp$ collisions at $\sqrt{s} =13$ TeV with the ATLAS detector
The production of a prompt photon in association with a $Z$ boson is studied in proton-proton collisions at a centre-of-mass energy $\sqrt{s} =$ 13 TeV. The analysis uses a data sample with an integrated luminosity of 139 fb$^{-1}$ collected by the ATLAS detector at the LHC from 2015 to 2018. The production cross-section for the process $pp \rightarrow \ell^+\ell^-\gamma+X$ ($\ell = e, \mu$) is measured within a fiducial phase-space region defined by kinematic requirements on the photon and the leptons, and by isolation requirements on the photon. An experimental precision of 2.9% is achieved for the fiducial cross-section. Differential cross-sections are measured as a function of each of six kinematic variables characterising the $\ell^+\ell^-\gamma$ system. The data are compared with theoretical predictions based on next-to-leading-order and next-to-next-to-leading-order perturbative QCD calculations. The impact of next-to-leading-order electroweak corrections is also considered.
Journal of high energy physics 2020(3), 54 (2020). doi:10.1007/JHEP03(2020)054
Published by SISSA, [Trieste]
perturbation theory [quantum chromodynamics], p p: scattering, direct production [photon], lepton, 13000 GeV-cms, transverse energy [photon], transverse momentum dependence, 530, energy dependence, rapidity dependence, differential cross section: measured, phase space, hadroproduction [Z0], measured [differential cross section], correction [electroweak interaction], [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], scattering [p p], quantum chromodynamics: perturbation theory, photon: transverse energy, rapidity [photon], higher-order: 2, perturbation theory: higher-order, higher-order: 1, Z0: hadroproduction, leptonic decay [Z0], ATLAS, mass dependence, higher-order [perturbation theory], 2 [higher-order], photon: associated production, photon: direct production, angular dependence, electroweak interaction: correction, CERN LHC Coll, kinematics, associated production [photon], photon: rapidity, Z0: leptonic decay, colliding beams [p p], p p: colliding beams, 1 [higher-order], experimental results
perturbation theory [quantum chromodynamics], p p: scattering, direct production [photon], lepton, 13000 GeV-cms, transverse energy [photon], transverse momentum dependence, 530, energy dependence, rapidity dependence, differential cross section: measured, phase space, hadroproduction [Z0], measured [differential cross section], correction [electroweak interaction], [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], scattering [p p], quantum chromodynamics: perturbation theory, photon: transverse energy, rapidity [photon], higher-order: 2, perturbation theory: higher-order, higher-order: 1, Z0: hadroproduction, leptonic decay [Z0], ATLAS, mass dependence, higher-order [perturbation theory], 2 [higher-order], photon: associated production, photon: direct production, angular dependence, electroweak interaction: correction, CERN LHC Coll, kinematics, associated production [photon], photon: rapidity, Z0: leptonic decay, colliding beams [p p], p p: colliding beams, 1 [higher-order], experimental results
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