标题： 核物质的横向包容响应 显示英文标题

标题： The inclusive transverse response of nuclear matter

摘要： 在饱和密度的核物质电磁横向关联响应的研究中，利用相关基态函数微扰理论，在动量转移q从300到550 MeV/c范围内进行了探讨。 相关算符包括一个Jastrow分量，用于描述短程排斥，以及更长程的自旋、张量和同位旋相关项。 采用了Schiavilla-Pandharipande-Riska模型来描述两体电磁流，该模型符合真实的v_14势，并满足连续性方程。 还包括由中间Delta-异构激发产生的流。 两体流的整体贡献为正值，增强了从低动量约20%到高动量约10%的一体横向响应。 这一发现与A=3,4核的横向欧几里得响应的Green函数蒙特卡罗研究一致，与费米气体和壳层模型得到的先前结果相矛盾。 发现相关项中的张量-同位旋分量是造成这种行为的主要原因。 核物质响应与最近关于40Ca和56Fe的实验数据进行了比较。 显示英文摘要

摘要： The electromagnetic inclusive transverse response of nuclear matter at saturation density is studied within the correlated basis function perturbation theory for momentum transfers q from 300 to 550 MeV/c. The correlation operator includes a Jastrow component, accounting for the short range repulsion, as well as longer range spin, tensor and isospin ones. The Schiavilla- Pandharipande-Riska model for the two-body electromagnetic currents, satisfying the continuity equation with realistic v_14 potentials, is adopted. Currents due to intermediate Delta-isobar excitations, are also included. The global contribution of the two-body currents turns out to be positive and provides an enhancement of the one-body transverse response ranging from about 20% for the lower momenta to about 10% for the higher ones. This finding is in agreement with the Green's Function Monte Carlo studies of the transverse Euclidean response in A=3,4 nuclei and contradicts previous results obtained within the Fermi gas and shell models. The tensor-isospin component of the correlation is found to be the leading responsible for such a behavior. The nuclear matter response is compared to recent experimental data on 40Ca and 56Fe.