Small x Asymptotics of the Quark and Gluon Helicity Distributions
Department of Physics, The Ohio State University, Columbus, OH 43210, USA
2 Division of Science, Penn State University-Berks, Reading, PA 19610, USA
3 Theoretical Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA
Published online: 26 January 2018
We determine the small-x asymptotics of the gluon helicity distribution in a proton at leading order in perturbative QCD at large Nc. To achieve this, we begin by evaluating the dipole gluon helicity TMD at small x. We then construct and solve novel small-x large-Nc evolution equations for the operator related to the dipole gluon helicity TMD. Our main result is the small-x asymptotics for the quark helicity distribution
© The Authors, published by EDP Sciences, 2018
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