Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2005-03-14
Phys.Lett. B612 (2005) 258-262
Physics
High Energy Physics
High Energy Physics - Phenomenology
9 pages, 1 figure, to appear Physics Letters B
Scientific paper
10.1016/j.physletb.2005.03.008
Transverse single-spin asymmetries (SSA) in inclusive reactions are now considered to be directly related to the transverse momentum ${\bf k}_{T}$ of the fundamental partons involved in the process. We find that the ideal probe to extract information on the gluon Sivers function is the transverse SSA of prompt photon production $p p^{\uparrow} \to \gamma X$, at large $p_T$. The following related processes, $p p^{\uparrow} \to \gamma + jet + X$, $p p^{\uparrow} \to \gamma^* + X \to \mu^+ \mu^- + X$ and $\bar{p} p^{\uparrow} \to \gamma + X$ are also briefly discussed.
Schmidt Ivan
Soffer Jacques
Yang Jian-Jun
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