Speaker
Description
The twist-three parton distribution functions are given by quark-gluon-quark matrix elements, and encode quantum interference between quark-gluon-quark states. I present the determination of the genuine twist-3 distribution directly from experimental data. The analysis combines observables described by collinear and transverse-momentum-dependent factorization theorems within a unified global fit, incorporating a complete leading-order QCD evolution at the twist-three level. The extracted distributions reveal a clear flavor-dependent patterns and distinct from zero at a statistically significant level (2−3σ). These findings provide the first quantitative evidence for quark-gluon-quark correlations within the proton, revealing its genuinely quantum nature and opening a new direction for precision studies of partonic correlations.
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