η-nucleus bound states in nuclei

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WANG Teng-Teng. η-nucleus bound states in nuclei[J]. Chinese Physics C, 2010, 34(4): 460-464. doi: 10.1088/1674-1137/34/4/008
WANG Teng-Teng. η-nucleus bound states in nuclei[J]. Chinese Physics C, 2010, 34(4): 460-464.  doi: 10.1088/1674-1137/34/4/008 shu
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Received: 2009-05-12
Revised: 2009-08-09
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η-nucleus bound states in nuclei

    Corresponding author: WANG Teng-Teng,
  • Institute of Theoretical Physics, College of Applied Sciences, Beijing University of Technology, Beijing 100124, China

Abstract: 

The binding energies εη and widths Γη of η-mesic nuclei are calculated. We parameterize the η self-energy in the nuclear medium as a function of energy and density. We find that the single-particle energies are sensitive to the scattering length, and increase monotonically with the nucleus. The key point for the study of η-nucleus bound states is the η-nuclear optical potential. We study the s-wave interactions of η mesons in a nuclear medium and obtain the optical potential Uη≈-72 MeV. Comparing our results with the previous results, we find that the ηN scattering length aηN is indeed important to the calculations. With increasing nuclear density the effective mass of the η meson decreases.

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