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The Sivers single-spin asymmetry in photon-jet production by Bacchetta, Alessandro; Bomhof, Cedran; D'Alesio, Umberto; Mulders, P. J.; Murgia, F. is a scholarly article available to read on EtoBox.

What is The Sivers single-spin asymmetry in photon-jet production about?

We study a weighted asymmetry in the azimuthal distribution of photon-jet pairs produced in the process p^\uparrow p --> \gamma jet X with a transversely polarized proton. We focus on the contribution of the Sivers effect only, considering experimental configurations accessible at RHIC-BNL. We show that predictions for the asymmetry, obtained in terms of gluonic-pole cross sections calculable in perturbative QCD, can be tested and clearly discriminated from those based on a generalized parton model, involving standard partonic cross sections. Experimental measurements of the asymmetry will therefore test our present understanding of single-spin asymmetries.

Author

Bacchetta, Alessandro; Bomhof, Cedran; D'Alesio, Umberto; Mulders, P. J.; Murgia, F.

Published

2007

Language

EN