核介质中的核子形状因子
Nucleon Form Factors in Nuclear Medium
摘要：
利用AdS/CFT对应，我们研究了核介质中核子与介子之间的各种形状因子。为了描述核介质全息，我们考虑到热荷AdS几何与适当的IR截止。在引入反常维数作为自由参数后，我们研究了反常维数的变化对核子质量的影响。此外，我们还研究了核子的形状因子如何依赖于核介质的性质。我们证明了在具有不同质子数和中子数的核介质中，真空中的简并核子形状因子分裂为四个不同的值，取决于核子和介子的同位旋荷。
英文摘要：
By using the AdS/CFT correspondence, we investigate various form factors between nucleons and mesons in a nuclear medium. In order to describe a nuclear medium holographically, we take into account the thermal charged AdS geometry with an appropriate IR cutoff. After introducing an anomalous dimension as a free parameter, we investigate how the nucleon's mass is affected by the change of the anomalous dimension. Moreover, we study how the form factors of nucleons rely on the properties of the nuclear medium. We show that in a nuclear medium with different numbers of proton and neutron, the degenerated nucleon form factor in the vacuum is split to four different values depending on the isospin charges of nucleon and meson.
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