AAMQS: A non-linear QCD analysis of new HERA data at small-x including heavy quarks

Abstract

We present a global analysis of available data on inclusive structure functions and reduced cross sections measured in electron-proton scattering at small values of Bjorken-x, x<0.01, including the latest data from HERA on reduced cross sections. Our approach relies on the dipole formulation of DIS together with the use of the non-linear running coupling BK equation for the description of the small-x dynamics. We improve our previous studies by including the heavy quark (charm and beauty) contribution to the reduced cross sections, and also by considering a variable flavor scheme for the running of the coupling. We obtain a good description of data, the fit parameters remaining stable with respect to our previous analyses where only light quarks were considered. The inclusion of the heavy quark contributions resulted in a good description of available experimental data for the charm component of the structure function and reduced cross section provide the initial transverse distribution of heavy quarks was allowed to differ (more specifically, to have a smaller radius) from that of the light flavors.

17 pages, 4 figures

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Cited by in corpus (210)

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• Next-to-leading order Balitsky-Kovchegov equation with resummation
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• A New Mechanism for Generating a Single Transverse Spin Asymmetry
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• Fully coherent energy loss effects on light hadron production in pA collisions
• CGC/saturation approach for soft interactions at high energy: a two channel model
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• Solution to the evolution equation at NLL for high parton density QCD
• Predictions for nuclear structure functions from the impact-parameter dependent Balitsky-Kovchegov equation
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• AAMQS: a non-linear QCD description of new HERA data at small-x
• Contribution of the non-linear term in the Balitsky-Kovchegov equation to the nuclear structure functions
• Exclusive heavy vector meson production at next-to-leading order in the dipole picture
• Two-gluon rapidity correlations of strong colour field in $pp$, $pA$ and $AA$ collisions
• Impact-parameter-dependent solutions to the Balitsky-Kovchegov equation at next-to-leading order
• Quarkonium production at collider energies in Small-$x$ formalism
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• Gluon saturation: survival probability for leading neutrons in DIS
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• Particle Production in the Color Class Condensate: from electron-proton DIS to proton-nucleus collisions
• Determination of the initial condition for the Balitsky-Kovchegov equation with transformers
• Review of Recent Developments in the CGC
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• Particle production from the Color Glass Condensate: proton-nucleus collisions in light of the HERA data
• Large-rapidity ridge correlations from Color Glass Condensate
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• Diffractive vector meson production in ultraperipheral heavy ion collisions from the Color Glass Condensate
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• Signatures of gluon saturation from structure-function measurements
• Prompt atmospheric neutrino flux from the various QCD models
• Scattering off the Color Glass Condensate
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