Color transparency and saturation in QCD

DOI10.1142/S0217732314300286zbMATH Open1296.81147arXiv1210.0733OpenAlexW2950897618MaRDI QIDQ2921582

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Publication date: 13 October 2014

Published in: (Search for Journal in Brave)

Abstract: We review the theoretical interpretation of deep-inelastic electron-proton scattering at low values of the Bjorken variable $xsimeq{Q}^2/W^{2}lsim0.1$. The process proceeds via the interaction of quark-antiquark $$ color-dipole fluctuations of the (virtual) photon with the proton. In terms of the forward Compton scattering amplitude, two reaction channels contribute to the interaction of the $$ color dipole with the gluon field in the proton. Dependent on the kinematics, there is either {it color transparency}, corresponding to a cancellation of the amplitudes for the two reaction channels, or {it saturation}, occuring when the process is dominated by a single interaction channel. The connection between the color-dipole picture and the pQCD improved parton model is elaborated upon.

Full work available at URL: https://arxiv.org/abs/1210.0733

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