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We study the small-x evolution equation for the gluon generalized parton distribution E_{g} of the nucleon. It is shown that E_{g} at vanishing skewness exhibits the Regge behavior identical to… Click to show full abstract
We study the small-x evolution equation for the gluon generalized parton distribution E_{g} of the nucleon. It is shown that E_{g} at vanishing skewness exhibits the Regge behavior identical to the Balitsky-Fadin-Kuraev-Lipatov pomeron despite its association with nucleon helicity-flip processes. We also consider the effect of gluon saturation and demonstrate that E_{g} gets saturated in the same way as its helicity-nonflip counterpart H_{g}. Our result has a direct impact on the modeling of E_{g} as well as the small-x contribution to nucleon spin sum rules.
Journal Title: Physical review letters
Year Published: 2022
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