Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2010-12-06
J.Phys.Conf.Ser.295:012083,2011
Physics
High Energy Physics
High Energy Physics - Phenomenology
to appear in the proceedings of the 19th International Spin Physics Symposium (Spin2010), Sept.27 - Oct.2, 2010, Juelich, Germ
Scientific paper
10.1088/1742-6596/295/1/012083
We study the single spin asymmetry (SSA) for the D-meson production $A_N^D$ in the $pp$ collision, $p^\uparrow p\to DX$, in the framework of the collinear factorization. Since the charm quark is mainly produced through the $c\bar{c}$-pair creation from the gluon-fusion process, this is an ideal process to probe the twist-3 triple-gluon correlation functions in the polarized nucleon. We derive the corresponding cross section formula for the contribution of the triple-gluon correlation function to $A_N^D$ in $p^\uparrow p\to DX$, applying the method developed for $ep^\uparrow\to eDX$ in our previous study. As in the case of $ep^\uparrow\to eDX$, our result differs from a previous study in the literature. We will also present a simple estimate of the triple-gluon correlation functions based on the preliminary data on $A_N^D$ by RHIC.
Koike Yuji
Yoshida Shinsuke
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