Volume 81, Number 4, February 2008
|Number of page(s)||6|
|Published online||24 January 2008|
-mesic nuclei in relativistic mean-field theory
Department of Physics, Nankai University - Tianjin 300071, China
2 Institute of High Energy Physics, Chinese Academy of Sciences - Beijing 100039, China
Accepted: 21 December 2007
With the -nucleon () interaction Lagrangian deduced from chiral perturbation theory, we study the possible -mesic nuclei in the framework of relativistic mean-field theory. The single-particle energies are sensitive to the scattering length, and increase monotonically with the nucleon number A. If the scattering length is in the range of = 0.75 - 1.05 fm and the imaginary potential V0 ~ 15 MeV, some discrete states of , and should be identified in experiments. However, when the scattering length < 0.5 fm, or the imaginary potential MeV, no discrete -meson bound states could be observed in experiments.
PACS: 21.10.Pc – Single-particle levels and strength functions / 21.30.Fe – Forces in hadronic systems and effective interactions
© EPLA, 2008
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