The Gluon Sivers Distribution in D production at RHIC

Details The Gluon Sivers Distribution in D production at RHIC The Gluon Sivers Distribution in D production at RHIC

2004-12-02

arxiv.org/abs/hep-ph/0412022v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 2 postscript figures, talk given by M. Boglione at SPIN04, 16th International Spin Physics Symposium, Trieste, Oct. 1

Scientific paper

The single transverse spin asymmetry in D meson production at RHIC can provide a clean measure of the gluon Sivers distribution function. At intermediate rapidity, D production is largely dominated by the elementary gg -> c c-bar channel, where there cannot be any transverse spin transfer. Therefore, any transverse single spin asymmetry observed for D's produced in polarized proton-proton interactions can only originate from the Sivers effect in the gluon distribution functions. A sizeable transverse single spin asymmetry measured by PHENIX or STAR experiments would then give direct information on the size of the gluon Sivers distribution function.

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