论文标题
质子 - deuteron drell-yan过程中的杜特龙极化，用于查找Gluon横向性
Deuteron polarizations in the proton-deuteron Drell-Yan process for finding the gluon transversity
论文作者
论文摘要
Deuteron中的Gluon横向分布由线性偏振的Deuteron状态之间的基质元素定义，除Lepton-Deuteron散射外，还可以在Proton-Deuteron碰撞中进行研究。通常使用光子的线性极化，而它很少用于自旋-1杜特龙。因此，对于实际的实验测量，在常规的杜特隆自旋极化方面表达杜特隆反应的横截面是可取的。在这项工作中，我们研究了质子 - deuteron drell-yan横截面如何通过传统的极化来表达用于查找Gluon转疗分布的传统极化。特别是，我们表明，可以通过在沿两种透射轴的杜特隆自旋极化之间取出横截面差异，可以在质子 - deuteron drell-yan过程中测量Gluon横向性。由于Spin-1/2核不存在Gluon的横向性，因此Deuteron的有限gluon横向性可能表明超出Deuteron核子简单结合系统以外的“外来”机制。因此，Gluon横向性是一种有趣且适当的观察，可阐明核中新的Hadronic机制。
The gluon transversity distribution in the deuteron is defined by the matrix element between linearly-polarized deuteron states, and it could be investigated in proton-deuteron collisions in addition to lepton-deuteron scattering. The linear polarization of photon is often used, whereas it is rarely used for the spin-1 deuteron. Therefore, it is desirable to express deuteron-reaction cross sections in term of conventional deuteron spin polarizations for actual experimental measurements. In this work, we investigate how proton-deuteron Drell-Yan cross sections are expressed by the conventional polarizations for finding the gluon transversity distribution. In particular, we show that the gluon transversity can be measured in the proton-deuteron Drell-Yan process by taking the cross-section difference between the deuteron spin polarizations along the two-transverse axes. Since the gluon transversity does not exist for the spin-1/2 nucleons, a finite gluon transversity of the deuteron could indicate an "exotic" mechanism beyond the simple bound system of the nucleons in the deuteron. Therefore, the gluon transversity is an interesting and appropriate observable to shed light on a new hadronic mechanism in nuclei.
