标题： 核物质中的rho介子 - 一种手征统一方法 显示英文标题

标题： The rho meson in nuclear matter - a chiral unitary approach

摘要： 在本工作中，研究了冷对称核物质中静止的$\rho$介子的性质。 我们利用手征单位方法研究矢量同位旋通道中的介子-介子散射，该方法从包含显式共振场的最低阶手征微扰理论（$\chi PT$）拉格朗日量计算得出。 通过将我们的表达式与单环$\chi PT$的表达式进行匹配，考虑了低能手征约束。 为了考虑介质修正，$\rho$与$\pi\pi$对相互作用，这些对在核介质中被适当重整化，考虑了$p-h$和$\Delta -h$激发。 在$\rho$直接耦合到$p-h$或$\Delta-h$激发态中的项也已被考虑。 此外，$\rho$也被允许耦合到$N^{*}(1520)-h$成分。 显示英文摘要

摘要： In this work, the properties of the $\rho$ meson at rest in cold symmetric nuclear matter are studied. We make use of a chiral unitary approach to pion-pion scattering in the vector-isovector channel, calculated from the lowest order Chiral Perturbation Theory ($\chi PT$) lagrangian including explicit resonance fields. Low energy chiral constraints are considered by matching our expressions to those of one loop $\chi PT$. To account for the medium corrections, the $\rho$ couples to $\pi\pi$ pairs which are properly renormalized in the nuclear medium, accounting for both $p-h$ and $\Delta -h$ excitations. The terms where the $\rho$ couples directly to the hadrons in the $p-h$ or $\Delta-h$ excitations are also accounted for. In addition, the $\rho$ is also allowed to couple to $N^{*}(1520)-h$ components.