Gluon distributions and their applications to Ioffe-time distributions

Understand

We investigate unpolarized and polarized gluon distributions and their applications to the Ioffe-time distributions, which are related to lattice QCD calculations of parton distribution functions.

• Guided by the counting rules based on the perturbative QCD at large momentum fraction $x$ and the color coherence of gluon couplings at small $x$, we parametrize gluon distributions in the helicity basis.
• By fitting the unpolarized gluon distribution, the inferred polarized gluon distribution from our parametrization agrees with the one from global analysis.
• A simultaneous fit to both unpolarized and polarized gluon distributions is also performed to explore the model uncertainty.