Small x Asymptotics of the Quark and Gluon Helicity Distributions

We determine the small-x asymptotics of the gluon helicity distribution in a proton at leading order in perturbative QCD at large N c . To achieve this, we begin by evaluating the dipole gluon helicity TMD at small x . We then construct and solve novel small- x large- N c evolution equations for the...

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Bibliographic Details
Main Authors: V. Kovchegov, Yuri, Pitonyak, Daniel, Sievert, Matthew D.
Format: Conference Proceeding
Language:English
Subjects:
Asymptotic properties
Dipoles
Helicity
Quantum chromodynamics
Quarks
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Summary:We determine the small-x asymptotics of the gluon helicity distribution in a proton at leading order in perturbative QCD at large N c . To achieve this, we begin by evaluating the dipole gluon helicity TMD at small x . We then construct and solve novel small- x large- N c 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
ISSN:2100-014X
2101-6275
2100-014X
DOI:10.1051/epjconf/201817203006