Color Glass Condensate at next-to-leading order meets HERA data

Abstract

We perform the first dipole picture fit to HERA inclusive cross section data using the full next-to-leading order (NLO) impact factor combined with an improved Balitsky-Kovchegov evolution including the dominant effects beyond leading logarithmic accuracy at low $x$. We find that three different formulations of the evolution equation that have been proposed in the recent literature result in a very similar description of HERA data, and robust predictions for future deep inelastic scattering experiments. We find evidence pointing towards a significant nonperturbative contribution to the structure function for light quarks, which stresses the need to extend the NLO impact factor calculation to massive quarks.

20 pages, 9 figures. v2: matches published version. Fit results available at https://doi.org/10.5281/zenodo.4229269

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• Maximally entangled proton and charged hadron multiplicity in Deep Inelastic Scattering
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• Forward dijets in proton-nucleus collisions at next-to-leading order: the real corrections
• DIS dijet production at next-to-eikonal accuracy in the CGC
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• Proton structure functions at NLO in the dipole picture with massive quarks
• Diffractive deep inelastic scattering at NLO in the dipole picture: the $q\bar{q}g$ contribution
• Energy dependent nuclear suppression from gluon saturation in exclusive vector meson production
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• Inclusive prompt photon-jet correlations as a probe of gluon saturation in electron-nucleus scattering at small $x$
• Dihadron production in DIS at NLO: the real corrections
• Vector quarkonia at the LHC with JETHAD: A high-energy viewpoint
• Inferring the initial condition for the Balitsky-Kovchegov equation
• Saturation effects in SIDIS at very forward rapidities
• Prospects for quarkonium studies at the high-luminosity LHC
• High-energy dipole scattering amplitude from evolution of low-energy proton light-cone wave functions
• Exotic tetraquarks at the HL-LHC with JETHAD: A high-energy viewpoint
• Finite-size effects on small-$x$ evolution and saturation in proton and nuclear targets
• Extended collinearly-improved Balitsky-Kovchegov evolution equation in target rapidity
• Unifying approaches: derivation of Balitsky hierarchy from the Lipatov effective action
• Exclusive processes in $ep$ collisions at the EIC and LHeC: A closer look on the predictions of saturation models
• Solutions to the Balitsky-Kovchegov equation including the dipole orientation
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• Initial condition for the Balitsky-Kovchegov equation at next-to-leading order
• NLO JIMWLK evolution with massive quarks
• Non-linear evolution in the re-summed next-to-leading order of perturbative QCD:\confronting the experimental data
• QCD traveling waves phenomenology revisited
• Triply Heavy $\Omega$ Baryons with JETHAD: A High-Energy Viewpoint
• Analytic solution of Balitsky-Kovchegov equation with running coupling constant using homogeneous balance method
• Complete calculation of exclusive heavy vector meson production at next-to-leading order in the dipole picture
• Tetraquark-Jet Systems at the High-Luminosity LHC
• Exclusive $\rho$ and $J/\Psi$ photoproduction in ultraperipheral $pO$ and $OO$ collisions at energies available at the CERN Large Hadron Collider
• Exclusive heavy vector meson production at next-to-leading order in the dipole picture
• Associated $\varphi$ and $J/\Psi$ photoproduction in ultraperipheral $PbPb$ collisions at the Large Hadron Collider and Future Circular Collider
• Collinear and TMD distributions with dynamical soft-gluon resolution scale
• Dijet impact factor in DIS at next-to-leading order in the Color Glass Condensate
• Twist decomposition of non-linear effects in Balitsky-Kovchegov evolution of proton structure functions
• Parton model contributions as next-to-eikonal corrections to the dipole factorization of DIS and SIDIS at low $x_{Bj}$
• Determination of the initial condition for the Balitsky-Kovchegov equation with transformers
• Improving the solver for the Balitsky-Kovchegov evolution equation with Automatic Differentiation
• A numerical implementation of the NLO DIS structure functions in the dipole picture
• Gluon imaging using azimuthal correlations in diffractive scattering at the Electron-Ion Collider
• Signatures of gluon saturation from structure-function measurements
• Color-glass condensate beyond the Gaussian approximation
• Exclusive production of light vector mesons at next-to-leading order in the dipole picture
• Reconstruction of the Dipole Amplitude in the Dipole Picture as a mathematical Inverse Problem