标题： 介子质量在核物质中 显示英文标题

标题： Meson Masses in Nuclear Matter

摘要： 粒子在核物质中的质量偏移$\Delta m$相对于其真空值被考虑。 一个一般公式将$\Delta m(E)$（$E$是粒子能量）与正向粒子-核子散射振幅的实部${\rm Re} f(E)$联系起来，并给出了其适用范围。 核物质中$\rho$介子的质量位移在$2\la E_{\rho}\la 7$ GeV 下计算，对于横向和纵向极化的$\rho$介子，结果为正常核密度下的$\Delta m_{\rho}^T \sim 50$ MeV 和$\Delta m_{\rho}^L \sim 10$ MeV。 显示英文摘要

摘要： Mass shifts $\Delta m$ of particles in nuclear matter relative to their vacuum values are considered. A general formula relating $\Delta m(E)$ ($E$ is the particle energy) to the real part of the forward particle-nucleon scattering amplitude ${\rm Re} f(E)$ is presented and its applicability domain is formulated. The $\rho$-meson mass shift in nuclear matter is calculated at $2\la E_{\rho}\la 7$ GeV for transversally and longitudinally polarized $\rho$-mesons with the results: $\Delta m_{\rho}^T \sim 50$ MeV and $\Delta m_{\rho}^L \sim 10$ MeV at normal nuclear density.