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Tensor Coupling Effects on Spin Symmetry in the Anti-Lambda Spectrum of Hypernuclei |
| SONG Chun-Yan1, YAO Jiang-Ming2,3, MENG Jie4,3,5**
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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
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| Cite this article: |
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SONG Chun-Yan, YAO Jiang-Ming, MENG Jie 2011 Chin. Phys. Lett. 28 092101 |
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Abstract Effects of ΛΛ ω−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.
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| Keywords:
21.80.+a
21.10.Hw
21.30.Fe
21.10.Pc
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Received: 30 November 2010
Published: 30 August 2011
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| PACS: |
21.80.+a
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(Hypernuclei)
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21.10.Hw
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(Spin, parity, and isobaric spin)
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21.30.Fe
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(Forces in hadronic systems and effective interactions)
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21.10.Pc
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(Single-particle levels and strength functions)
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