Chinese Physics C > 2010, Vol. 34 > Issue(4): 460-464 DOI: 10.1088/1674-1137/34/4/008

η-nucleus bound states in nuclei

WANG Teng-Teng^,

Institute of Theoretical Physics, College of Applied Sciences, Beijing University of Technology, Beijing 100124, China

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The binding energies ε_ηand widths Γ_ηof 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 thes-wave interactions of η mesons in a nuclear medium and obtain the optical potential U_η≈－72 MeV. Comparing our results with the previous results, we find that the ηN scattering length a_ηNis indeed important to the calculations. With increasing nuclear density the effective mass of the η meson decreases.

References

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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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沈阳化工大学材料科学与工程学院沈阳 110142

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

Received Date:2009-05-12

Accepted Date:2009-08-09

Available Online:2010-04-05

Abstract:

The binding energies ε_ηand widths Γ_ηof 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 thes-wave interactions of η mesons in a nuclear medium and obtain the optical potential U_η≈－72 MeV. Comparing our results with the previous results, we find that the ηN scattering length a_ηNis indeed important to the calculations. With increasing nuclear density the effective mass of the η meson decreases.

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η-nucleus bound states in nuclei

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