Vector mesons in the nuclear medium with a finite three-momentum
Vector mesons in the nuclear medium with a finite three-momentum
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DOI：
10.1103/physrevc.57.927
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发表时间：
1998-02
影响因子：
3.1
通讯作者：
S. H. Lee
中科院分区：
文献类型：
--
作者：
S. H. Lee
我们建立了一个QCD求和定则，用来计算核介质中矢量介子谱密度峰值位置对三个动量的依赖关系。我们发现在核物质密度和（$q =0.5$GeV/c）的$\rho，\omega（\phi$）介子的峰值位置移动不到2%（0.1%）。然而，在更高的密度和三个动量，它的影响变得不可忽略。讨论了我们的结果在A-A和p-A反应双轻子谱中的相关性。
We formulate a QCD sum rule to find the three momentum dependence of the peak position of the vector meson spectral density in nuclear medium. We find less than 2 % (0.1 %) shift of the peak position at nuclear matter density and at ($q =0.5$GeV/c) for the $\rho,\omega (\phi$) mesons. However, at higher density and three momentum, its effect becomes non-negligible. The relevance of our result in the dilepton spectrum in A-A and p-A reaction is discussed.