P) Reactions
P) Reactions
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P) 反应
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通讯作者：
L. Lapiḱas
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作者：
C. Barbieri;D. Rohe;I. Sick;L. Lapiḱas
最近在TJNAF使用12c （e, e ' p）反应的实验E97-006的数据在非常大的缺失能量和动量下与两步重散射的计算进行了比较。平行运动学和垂直运动学之间的比较表明，在前者的情况下，最终状态相互作用的影响可以大大减少。短程和张量相关（SRC）一直被认为是影响核系统动力学的主要因素之一[1,2]。它们的主要作用是将相当大的光谱强度（10-20%[3]）转移到非常高的能量和动量。这导致准粒子轨道[4]同样大的耗损，这与给定的壳层和核质量数相当无关。基于现实现象学神经网络相互作用的几项理论研究表明，大多数相关强度是沿着动量-能量平面（k-E）的脊线发现的，该脊线跨越数百MeV/c （MeV）的区域[5,6,7]，对应于淘汰截面中的大缺失动量（p m）和能量（E m）。这种对谱函数的贡献也导致了核系统[8]的大部分结合能。这些计算预测的主要特征与最近的实验数据一致[9,10]，这将在下面进一步考虑。如果能通过实验准确地确定空穴谱函数S h （p m, E m）的相关强度，将是我们的研究的一个重要进展
Recent data from experiment E97-006 at TJNAF using the 12 C(e, e ′ p) reaction at very large missing energies and momenta are compared to a calculation of two-step rescattering. A comparison between parallel and perpendicular kinematics suggests that the effects of final state interactions can be strongly reduced in the former case. Short-range and tensor correlations (SRC) have long been known to be one of the major elements influencing the dynamics of nuclear systems [1,2]. Their main effects consist in shifting a sizable amount of spectral strength, 10-20% [3], to very high energies and momenta. This results in an equally large depletion of quasi-particle orbitals [4], which is fairly independent of the given shell and the nuclear mass number. Several theoretical studies, based on realistic phenomenological NN interactions, have suggested that most of the correlated strength is found along a ridge in the momentum-energy plane (k-E) which spans a region of several hundred MeV/c (MeV) [5,6,7] which corresponds to large missing momenta (p m) and energies (E m) in knock out cross sections. This contribution to the spectral function is also responsible for most of the binding energy of nuclear systems [8]. The main characteristics predicted by these calculations are consistent with recent experimental data [9,10], which will be considered further below. An accurate experimental determination of the correlated strength in the hole spectral function S h (p m , E m) would represent an important advance in our