Impact of the triple-gluon correlation functions on the single spin asymmetries in pp collisions

TL;DR

This paper investigates how twist-3 triple-gluon correlation functions influence single-spin asymmetries in proton-proton collisions, providing theoretical calculations and comparing them with RHIC data.

Contribution

It introduces a calculation of single-spin asymmetries in D-meson and direct-photon production considering triple-gluon correlations, highlighting their impact.

Findings

Correlation functions significantly affect asymmetries

Model calculations align with preliminary RHIC data

Provides insight into gluonic contributions to spin phenomena

Abstract

We calculate the single-spin-dependent cross section formula for the D-meson production and the direct-photon production in the pp collision induced by the twist-3 triple-gluon correlation functions in the transversely polarized nucleon. We also present a model calculation for the asymmetries in comparison with the preliminary data given by RHIC, showing the impact of the correlation functions on the asymmetries.