论文标题
T-ODD质子螺旋不对称性在扰动QCD中
T-odd proton-helicity asymmetry in semi-inclusive DIS in perturbative QCD
论文作者
论文摘要
我们计算单旋不对称$ a_ {ul} $在不偏振的瘦素和纵向极化质子的半弹性散射中，该散射在产生的强大的强大横向动量下。我们的计算是按照QCD扰动理论的最低顺序进行共线性分解的。对于光子交换，不对称是T-ODD，并从树水平和一环吸收振幅的干扰中获得贡献。我们考虑了在低横向动量下自旋不对称的行为，其中可以基于横向摩托依赖分布函数与形式主义接触。我们还提出了与指南针和爱马仕实验以及未来电子离子对撞机有关的一些现象学结果。
We compute the single-spin asymmetry $A_{UL}$ in semi-inclusive deep-inelastic scattering of unpolarized leptons and longitudinally polarized protons at large transverse momentum of the produced hadron. Our calculation is performed in collinear factorization at the lowest order of QCD perturbation theory. For photon exchange the asymmetry is T-odd and receives contributions from the interference of the tree level and one-loop absorptive amplitudes. We consider the behavior of the spin asymmetry at low transverse momentum where contact to the formalism based on transverse-momentum dependent distribution functions can be made. We also present some phenomenological results relevant for the COMPASS and HERMES experiments and the future Electron-Ion Collider.
