Tensor Coupling Effects on Spin Symmetry in the Anti-Lambda Spectrum of Hypernuclei
SONG Chun-Yan1, YAO Jiang-Ming2,3, MENG Jie4,3,5**
1State Key Laboratory of Software Development Environment, and School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191 2School of Physical Science and Technology, Southwest University, Chongqing 400715 3State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871 4School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191 5Department of Physics, University of Stellenbosch, Stellenbosch, South Africa
Tensor Coupling Effects on Spin Symmetry in the Anti-Lambda Spectrum of Hypernuclei
SONG Chun-Yan1, YAO Jiang-Ming2,3, MENG Jie4,3,5**
1State Key Laboratory of Software Development Environment, and School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191 2School of Physical Science and Technology, Southwest University, Chongqing 400715 3State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871 4School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191 5Department of Physics, University of Stellenbosch, Stellenbosch, South Africa
摘要Effects of ΛΛω−tensor coupling on the spin symmetry of Λ spectra in Λ−nucleus systems are studied using relativistic mean-field theory. Taking 12C+Λ as an example, it is found that the tensor coupling enlarges the spin−orbit splittings of Λ by a factor of 5 but has a negligible effect on the wave functions of Λ. Similar conclusions are observed in other Λ−nuclei, including 16O+Λ, 40Ca+Λ and 208Pb+Λ. It is indicated that the spin symmetry in anti-lambda-nucleus systems is still a good approximation irrespective of the tensor coupling.
Abstract：Effects of ΛΛω−tensor coupling on the spin symmetry of Λ spectra in Λ−nucleus systems are studied using relativistic mean-field theory. Taking 12C+Λ as an example, it is found that the tensor coupling enlarges the spin−orbit splittings of Λ by a factor of 5 but has a negligible effect on the wave functions of Λ. Similar conclusions are observed in other Λ−nuclei, including 16O+Λ, 40Ca+Λ and 208Pb+Λ. It is indicated that the spin symmetry in anti-lambda-nucleus systems is still a good approximation irrespective of the tensor coupling.
SONG Chun-Yan;YAO Jiang-Ming;MENG Jie;**
. Tensor Coupling Effects on Spin Symmetry in the Anti-Lambda Spectrum of Hypernuclei[J]. 中国物理快报, 2011, 28(9): 92101-092101.
SONG Chun-Yan, YAO Jiang-Ming, MENG Jie, **
. Tensor Coupling Effects on Spin Symmetry in the Anti-Lambda Spectrum of Hypernuclei. Chin. Phys. Lett., 2011, 28(9): 92101-092101.
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