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arXiv 0705.3617nucl-thhep-ph
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半包容深非弹性过程A(e,e'p)X中的末态相互作用效应

Final State Interaction Effects in Semi-inclusive Deep Inelastic processes A(e,e'p)X off the deuteron and complex nuclei

M. Alvioli, C. Ciofi degli Atti, V. Palli, L. P. Kaptari

摘要:

详细研究了末态相互作用(FSI)在半包容电子离核深度非弹性散射过程$A(e,e'p)X$中的作用。描述了质子产生的旁观者和目标的碎裂机制,其相关的束缚核子的深度非弹性结构函数和非微扰强子化过程的实验研究进行了分析。特别注意的是对应于现有的和即将到来的实验数据在Jlab的运动学条件下的氘核目标。我们认为,有FSI效应最小化的运动学区域,允许DIS结构功能的可靠调查,和夸克胶子碎片与核子的相互作用最大化的区域,这使得研究强子化机制成为可能。原子核结构用真实的波函数和谱函数来描述,末态相互作用用程函近似方法来处理,该方法考虑了夸克胶子碎片与剩余核的再散射,在复杂核的情况下,用光学势方法来考虑撞击质子的FSI。

英文摘要:

The effects of the final state interaction (FSI) in semi inclusive deep inelastic electron scattering processes $A(e,e'p)X$ off nuclei are investigated in details. Proton production is described within the spectator and the target fragmentation mechanisms whose relevance to the experimental study of the deep inelastic structure functions of bound nucleons and the non perturbative hadronization process is analyzed. Particular attention is paid to the deuteron target within kinematical conditions corresponding to the available and forthcoming experimental data at Jlab. We argue that there are kinematical regions where FSI effects are minimized, allowing for a reliable investigation of the DIS structure functions, and regions where the interaction of the quark-gluon debris with nucleons is maximized, which makes it possible to study hadronization mechanisms. Nuclear structure has been described by means of realistic wave functions and spectral functions and the final state interaction has been treated within an eikonal approximation approach which takes into account the rescattering of the quark-gluon debris with the residual nucleus and, in the case of complex nuclei, within an optical potential approach to account for the FSI of the struck proton.

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