论文标题
Instanton诱导横向单个自旋不对称，以$π^0 $生产为$ pp $ - 散发
Instanton induced transverse single spin asymmetry for $π^0$ production in $pp$-scattering
论文作者
论文摘要
我们在$ p^{\ uparrow} + p \toπ^0 + x $中计算PION的生产横截面和横截面的单旋不对称。我们的计算是基于Instanton诱导的有效夸克 - 格鲁隆和夸克 - 丝线 - 彼得 - 彼得相互作用的存在，并具有强大的自旋依赖性。在此框架中，我们在不使用碎片函数的情况下计算横截面。我们将模型的预测与RHIC的数据进行比较。我们的数值结果基于QCD真空的Instanton液体模型，与未偏置的横截面数据一致。根据实验观察，不对称的生长随着pion $ k_t $的横向动量而生长。它达到值$ \ sim 10 \％$，但比实验显示的$ k_t $更高。
We calculate the production cross-section and the transverse single-spin asymmetry for pion in $p^{\uparrow}+p\to π^0 + X$. Our computation is based on existence of the instanton induced effective quark-gluon and quark-gluon-pion interactions with a strong spin dependency. In this framework we calculate the cross section without using fragmentation functions. We compare predictions of the model with data from RHIC. Our numerical results, based on the instanton liquid model for QCD vacuum, are in agreement with unpolarized cross section data. The asymmetry grows with the transverse momentum of pion $k_t$ in accordance with experimental observations. It reach value $\sim 10\%$ but at higher $k_t$ than experiment shows.
