期刊
PHYSICAL REVIEW D
卷 78, 期 11, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.78.114013
关键词
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资金
- U. S. Department of Energy [DE-FG02-87ER40371, DE-AC02-98CH10886, DE-AC02-05CH11231]
- Institute of High Energy Physics
- Chinese Academy of Science
We calculate the single transverse-spin asymmetry for open charm production in pp collisions within the QCD collinear factorization approach. We include contributions from both twist-three quark-gluon and trigluon correlation functions. We find that the quark-gluon correlation functions alone generate only a very small asymmetry for open charm production in the kinematic region of current interest at RHIC, so that the observation of any significant single-spin asymmetry would be a clear indication of the presence of trigluon correlations inside a polarized proton. We furthermore demonstrate that the trigluon contribution could be very different for the production of D and (D) over bar mesons. These features make the single-spin asymmetry in open charm production in polarized pp collisions at RHIC an excellent probe of trigluon correlation functions.
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