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arXiv 1702.07809hep-ph
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色蒸发模型中极化重夸克偶素的产生

Polarized Heavy Quarkonium Production in the Color Evaporation Model

Vincent Cheung, Ramona Vogt

摘要:

我们用色蒸发模型研究了极化重夸克偶素的产生。在$p+p$碰撞中,我们给出了极化总屈服比随质心能量和快度的变化。在远高于$Q \overline Q$产生阈值的能量下,我们发现charmonium和bottomonium的产生是纵向极化的($J_z=0$)。夸克偶素态在中心快度处也是纵向极化的,在最向前的快度处变成横向极化($J_z=\pm1$)。

英文摘要:

We explore polarized heavy quarkonium production using the color evaporation model at leading order. We present the polarized to total yield ratio as a function of center of mass energy and rapidity in $p+p$ collisions. At energies far above the $Q \overline Q$ production threshold, we find charmonium and bottomonium production to be longitudinally polarized ($J_z=0$). The quarkonium states are also longitudinally polarized at central rapidity, becoming transversely polarized ($J_z=\pm1$) at the most forward rapidities.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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