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- W1901932246 abstract "We analyze the transverse single-spin asymmetry in direct photon production from proton-proton collisions, denoted $A_N^gamma$, within collinear twist-3 factorization. We provide a calculation of the contribution due to quark-gluon-quark correlations in the unpolarized proton as well as summarize previous studies on those effects in the polarized proton. Both soft-gluon poles and soft-fermion poles are considered. From this complete result we then estimate $A_N^gamma$, including error bands due to uncertainties in the non-perturbative inputs, at kinematics relevant for planned measurements of this observable at the Relativistic Heavy Ion Collider. We find $A_N^gamma$ can allow for a clean extraction of the Qiu-Sterman function, which could lead to a definitive solution to the so-called sign mismatch crisis. Since we use the Sivers function extracted from semi-inclusive deep-inelastic scattering to develop our input for the Qiu-Sterman function, this reaction can also make a statement about the process dependence of the Sivers function." @default.
- W1901932246 created "2016-06-24" @default.
- W1901932246 creator A5023272769 @default.
- W1901932246 creator A5035557129 @default.
- W1901932246 creator A5040150131 @default.
- W1901932246 creator A5068125473 @default.
- W1901932246 date "2015-01-12" @default.
- W1901932246 modified "2023-10-17" @default.
- W1901932246 title "Transverse single-spin asymmetries inp↑p→γXfrom quark-gluon-quark correlations in the proton" @default.
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- W1901932246 doi "https://doi.org/10.1103/physrevd.91.014013" @default.
- W1901932246 hasPublicationYear "2015" @default.
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