论文标题
揭开核子3D手性-ODD结构带射流轴
Unveiling Nucleon 3D Chiral-Odd Structure with Jet Axes
论文作者
论文摘要
我们将喷射聚类重新解释为轴辅助过程，该过程与质子光束一起定义了深度无弹性散射（DIS）中的虚拟光子横向动量$ q_t $。通过这种方式，我们能够以完全包容的方式使用射流轴探测核子的固有结构，类似于Drell-Yan过程。我们介绍了方位角不对称的完整列表和在核子深弹性散射的领先功率方面的相关分解公式。分解公式既涉及传统的时间反转（T-EVEN）射流函数和T-ODD，它们可以在领先扭曲的情况下访问所有transversementmomentum依赖的Parton分布函数（TMD PDF）。由于分解成分长达$ q_t \ ll q $，其中$ q $是光子虚拟性，因此对于具有相对较低能量的机器，例如中国的电子撞机（EICC），对核子结构的喷射轴探针应该是可行的。我们表明，在获胜的全部（WTA）轴找到方案中，T-ODD射流函数与夸克横向性或Boer-Mulders函数之间的耦合可能会在EICC，EIC和HERA处引起相当大的方位构象。我们还对Belle和其他能量的$ E^+E^ - $ Enihihitation中背对背生产的方位角不对称进行了预测。
We reinterpret jet clustering as an axis-finding procedure which, along with the proton beam, defines the virtual-photon transverse momentum $q_T$ in deep inelastic scattering (DIS). In this way, we are able to probe the nucleon intrinsic structure using jet axes in a fully inclusive manner, similar to the Drell-Yan process. We present the complete list of azimuthal asymmetries and the associated factorization formulae at leading power for deep-inelastic scattering of a nucleon. The factorization formulae involve both the conventional time-reversal-even (T-even) jet function and the T-odd one, which have access to all transverse-momentum-dependent parton distribution functions (TMD PDFs) at leading twist. Since the factorization holds as long as $q_T \ll Q$, where $Q$ is the photon virtuality, the jet-axis probe into the nucleon structure should be feasible for machines with relatively low energies such as the Electron-Ion Collider in China (EicC). We show that, within the winner-take-all (WTA) axis-finding scheme, the coupling between the T-odd jet function and the quark transversity or the Boer-Mulders function could induce sizable azimuthal asymmetries at the EicC, the EIC and HERA. We also give predictions for the azimuthal asymmetry of back-to-back dijet production in $e^+e^-$ annihilation at Belle and other energies.
