论文标题
观察方位角抑制对电子散射核中的强子对的抑制
Observation of azimuth-dependent suppression of hadron pairs in electron scattering off nuclei
论文作者
论文摘要
我们介绍了电子核散射中二二龙角相关性的第一个测量。数据是用CLAS检测器和5.0 GEV电子束入射在氘,碳,铁和铅靶标上的。相对于氘,带电对的核产量表现出对方位角相反对的强烈抑制作用,对附近的方位角不抑制,并且增强了具有较大不变质量的对。这些影响随核大小的增加而增长。数据是由GIBUU模型定性描述的,该模型表明在核表面附近形成了Hadron,并在核中经历了多散射。这些结果表明,角相关研究可以打开一种新的方法,以阐明核内生物形成和相互作用
We present the first measurement of di-hadron angular correlations in electron-nucleus scattering. The data were taken with the CLAS detector and a 5.0 GeV electron beam incident on deuterium, carbon, iron, and lead targets. Relative to deuterium, the nuclear yields of charged-pion pairs show a strong suppression for azimuthally opposite pairs, no suppression for azimuthally nearby pairs, and an enhancement of pairs with large invariant mass. These effects grow with increased nuclear size. The data are qualitatively described by the GiBUU model, which suggests that hadrons form near the nuclear surface and undergo multiple-scattering in nuclei. These results show that angular correlation studies can open a new way to elucidate how hadrons form and interact inside nuclei