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Density dependence of 2p-2h meson-exchange currents

机译:2P-2H Meson交换电流的密度依赖性

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摘要

We analyze the density dependence of the contribution of meson-exchange currents to the lepton-nucleus inclusive cross section in the two-particle two-hole channel. The model is based on the relativistic Fermi gas, where each nucleus is characterized by its Fermi momentum k(F). We find that the 2p-2h nuclear response functions at their peaks scale as Ak(F)(2) for Fermi momentum going from 200 to 300 MeV/c and momentum transfer q from 2k(F) to 2 GeV/c. This behavior is different from what is found for the quasielastic response, which scales as A/k(F). Additionally, the deep scaling region is also discussed and there the usual scaling behavior is found to be preferable.
机译:我们分析了Meson-Exchange电流贡献的密度依赖性在双粒子双孔通道中的Lepton-nucleus横截面中的贡献。 该模型基于相对论的费米气体,其中每个细胞核的特征在于其FERMI动量K(F)。 我们发现,对于FERMI势头的AK(F)(2),2P-2H核响应函数以200至300 meV / C为2k(f)至2 gev / c的动量转移q。 这种行为与发现的准响应的响应不同,该行为是A / K(f)的尺度。 另外,还讨论了深度缩放区域,并且发现通常的缩放行为是优选的。

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