论文标题
单个自旋不对称$ a_ {ul}^{\ sin（ϕ_h-ϕ_r）} $ in Dihadron semi-Inclusive dis
Single spin asymmetry $A_{UL}^{\sin(ϕ_h-ϕ_R)}$ in dihadron semi-inclusive DIS
论文作者
论文摘要
在本文中，我们研究了Dihadron生产的单一纵向旋转不对称$ a_ {ul}^{\ sin（ϕ_h-ϕ_r）} $在半包含的深度无弹性散射（Sidis）中通过螺旋性依赖性的二脑dihadron碎片函数（diff）的跨度跨度的跨度跨度的跨度跨度的跨度跨度的跨度跨度的变化，这是一个跨度的跨度跨度的变化。强子对。最近，通过Compass Collaboration在Dihadron Sidis中寻找这种方位角不对称性的实验性搜索产生了很小的信号。在这里，我们使用观众模型来计算这个未知的T-ODD diff $ g_1^\ perp $，以访问不对称并阐明为什么信号很小。已经应用了横向动量依赖性（TMD）分解方法，其中最终状态强子对叶的横向动量已被应用。我们估计指南针实验运动学上的$ \ sin（ϕ_h-ϕ_r）$不对称，并与数据进行比较。更重要的是，在电子离子对撞机（EIC）上还进行了相同不对称的预测。
In this paper we study the single longitudinal spin asymmetry $A_{UL}^{\sin(ϕ_h-ϕ_R)}$ of dihadron production in semi-inclusive deep inelastic scattering (SIDIS) via helicity-dependent dihadron fragmentation function (DiFF), which describes the correlation of the longitudinal polarization of a fragmenting quark with the transverse momenta of the produced hadron pair. Recently experimental searching for this azimuthal asymmetry in dihadron SIDIS by the COMPASS Collaboration yielded a very small signal. Here we calculate this unknown T-odd DiFF $G_1^\perp$ using a spectator model to access the asymmetry and clarify why the signal is very small. The transverse momentum dependent (TMD) factorization method, in which the transverse momentum of the final state hadron pair leaves unintegrated, has been applied. We estimate the $\sin(ϕ_h-ϕ_R)$ asymmetry at the kinematics of COMPASS experiments and compare with the data. What's more, the predictions on the same asymmetry are also made at the Electron Ion Collider (EIC).
