Effective Mass of Kaons in Hyperon-Rich Matter

  • By including the scalar isovector meson δ, we extend the relativistic mean field model and the one-boson exchange model of changing K-meson in the framework of Schaffner's relativistic mean field model. We re-consider the coupling constants for the interactions between the meson and the baryon and the interactions of the K meson with different mesons as well in various parameter sets. Using our model, we discuss the effective masses of K mesons in the hyperon-rich nuclear matter. We find that the density modification of the K meson mass in the strange nuclear matter is smaller than that in the pure nuclear matter. The influence of the scalar isovector meson δ on the effective mass of kaon is rather evident. But the extent of the influence is different in different parameter sets.
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LI Xi-Guo, LIU Xin-Yu and GAO Yuan. Effective Mass of Kaons in Hyperon-Rich Matter[J]. Chinese Physics C, 2007, 31(10): 922-928.
LI Xi-Guo, LIU Xin-Yu and GAO Yuan. Effective Mass of Kaons in Hyperon-Rich Matter[J]. Chinese Physics C, 2007, 31(10): 922-928. shu
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Received: 2006-12-19
Revised: 2007-03-12
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Effective Mass of Kaons in Hyperon-Rich Matter

    Corresponding author: LI Xi-Guo,
  • Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China2 Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator of Lanzhou, Lanzhou 730000, China3 Graduate University of Chinese Academy of Sciences, Beijing 100049, China4 School of Information Technology, Hangzhou Dianzi University, Hangzhou 310037, China

Abstract: By including the scalar isovector meson δ, we extend the relativistic mean field model and the one-boson exchange model of changing K-meson in the framework of Schaffner's relativistic mean field model. We re-consider the coupling constants for the interactions between the meson and the baryon and the interactions of the K meson with different mesons as well in various parameter sets. Using our model, we discuss the effective masses of K mesons in the hyperon-rich nuclear matter. We find that the density modification of the K meson mass in the strange nuclear matter is smaller than that in the pure nuclear matter. The influence of the scalar isovector meson δ on the effective mass of kaon is rather evident. But the extent of the influence is different in different parameter sets.

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