Heavy Quarkonium Production in Single Transverse Polarized High Energy Scattering
Heavy Quarkonium Production in Single Transverse Polarized High Energy Scattering
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DOI：
10.1103/physrevd.78.014024
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发表时间：
2008-01
期刊：
影响因子：
--
通讯作者：
F. Yuan
中科院分区：
文献类型：
--
作者：
F. Yuan
在非相对论极限下，我们描述了轻子-核子和核子-核子碰撞中重夸克产生中的单横向自旋不对称性。我们发现，这种不对称性对产生机制非常敏感。当重夸克和反夸克以单色组态产生时，与重夸克和反夸克的终态相互作用相互抵消，或者当它们是色八重态时，与pp散射中的初态相互作用相互抵消。因此，仅在颜色-八位组模型中的EP冲突中，不对称性不为零，而在仅在颜色-单重态模型中的PP冲突中，不对称性是非零的。
We formulate the single transverse spin asymmetry in heavy quarkoniumproduction in lepton-nucleon and nucleon-nucleon collisionsin the non-relativistic limit. We findthat the asymmetry is very sensitive to the production mechanism. The finalstate interactions with the heavy quark and antiquark cancel out among themselves whenthe pair are produced in a color-single configuration, or cancel out with the initialstate interaction in pp scattering when they are in color-octet. As a consequence, the asymmetry is nonzero in ep collisions only in the color-octet model, whereas in pp collisions only in the color-singlet model.