论文标题
单个自旋不对称$ a_ {ul}^{\ sin（dihadron semi-Inclusive dis中）
Single spin asymmetry $A_{UL}^{\sin(2ϕ_h-2ϕ_R)}$ in dihadron semi-inclusive DIS
论文作者
论文摘要
Dihadron生产的单个纵向自旋不对称$ a_ {ul}^{\ sin（2d ϕ_h-2ϕ_r）} $在半包含的深层弹性散射（SIDIS）中的产生（SIDIS），通过helicity依赖性dihadron dihadron碎片函数（fiff）$ g_1^\ perp $。该差异说明了碎夸克的纵向极化与产生的强子对的横向动量的相关性。 Compass Collaboration在Dihadron Sidis中对这种方位角不对称的实验研究最近产生了很小的信号。在这里，计算了使用观众模型的未知t-odd dihadron碎片函数$ g_1^\ perp $。该模型已成功地用于描述非极化和单极化过程中的二脑子产生，以访问不对称性并阐明为什么信号很小。已经考虑了最终状态强子对的横向动量的横向动量依赖性分解方法。估计了指南针运动学处的$ \ sin（2x_h-2ϕ_r）$不对称性，我们将其与数据进行比较。此外，在爱马仕和电子离子对撞机上还做出了相同不对称的预测。
The single longitudinal spin asymmetry $A_{UL}^{\sin(2ϕ_h-2ϕ_R)}$ of dihadron production in semi-inclusive deep inelastic scattering (SIDIS) is examined through helicity-dependent dihadron fragmentation function (DiFF) $G_1^\perp$. The correlation of the longitudinal polarization of a fragmenting quark with the transverse momenta of the produced hadron pair is illustrated by this DiFF. The experimental investigation for this azimuthal asymmetry in dihadron SIDIS by the COMPASS Collaboration has lately yielded a very small signal. Here, the unknown T-odd dihadron fragmentation function $G_1^\perp$ utilizing a spectator model is computed. The model has been successfully used to describe the dihadron production in both the unpolarized and the single polarized processes to access the asymmetry and clarify why the signal is very small. The transverse momentum dependent factorization method, in which the transverse momentum of the final state hadron pair is left unintegrated, has been considered. The $\sin(2ϕ_h-2ϕ_R)$ asymmetry at the COMPASS kinematics is estimated and we compare it with the data. Besides, the predictions on the same asymmetry are also made at the HERMES and Electron Ion Collider.
