Polarization effect on the spin symmetry for anti-Lambda spectrum in <SUP>16</SUP>O+Λ system

SONG Chun-Yan; YAO Jiang-Ming

doi:10.1088/1674-1137/34/9/061

Chinese Physics C> 2010, Vol. 34> Issue(9) : 1425-1427 DOI: 10.1088/1674-1137/34/9/061

Polarization effect on the spin symmetry for anti-Lambda spectrum in ¹⁶O+Λ system

SONG Chun-Yan ^, ,
YAO Jiang-Ming

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Abstract：
The polarization effect on the spin symmetry for anti-Lambda spectrum in ¹⁶O+Λ system has been studied in relativistic mean-field theory. The PK1 effective interaction is used for nucleon-meson couplings and G-parity symmetry with a reduction factor ξ=0.3 is adopted for anti-Lambda-meson couplings. The energy differences between spin doublets in the anti-Lambda spectrum are around 0.10-0.73 MeV for p_Λ state. The dominant components of the Dirac spinor for the anti-Lambda spin doublets are found to be near identical. It indicates that the spin symmetry is still well-conserved against the polarization effect from the valence anti-Lambda hyperon, which leads to a highly compressed cold nucleus with the central density up to 2－3 times of saturated density.

References

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. Arima A, Harvey M, Shimizu K. Phys. Lett. B, 1969, 30:517-5222. Hecht K, Adler A. Nucl. Phys. A, 1969, 137: 129-1433. MENG J et al. Prog. Part. Nucl. Phys., 2006, 57: 470-5634. Bahri C, Draayer J P, Moszkowski S A. Phys. Rev. Lett.,1992, 68: 2133-21365. Blokhin A L, Bahri C, Draayer J P. Phys. Rev. Lett.,1995, 74: 4149-41526. Ginocchio J N. Phys. Rev. Lett., 1997, 78: 436-439; Phys.Rep., 2005, 414: 165-2617. MENG J et al. Phys. Rev. C, 1998, 58: R628-R6318. MENG J et al. Phys. Rev. C, 1999, 59: 154-1639. Bürvenich T et al. Phys. Lett. B, 2002, 542: 261-26710. Mishustin I N et al. Phys. Rev. C, 2005, 71: 035201(1-32)11. Friedman E, Gal A, Mares J. Nucl. Phys. A, 2005, 761:283-29512. Larionov A B et al. Phys. Rev. C, 2008, 78: 014604(1-14)13. Larionov A B et al. Phys. Rev. C, 2009 80: R021601(1-5)14. ZHOU S G, MENG J, RING P. Phys. Rev. Lett., 2003, 91:262501(1-4)15. SONG C Y, YAO J M, MENG J. Chin. Phys. Lett., 2009,26: 122102(1-3)16. LONG W H et al. Phys. Rev. C, 2004, 69: 034319(1-15)17. Jennings B K. Phys. Lett. B, 1990, 246: 325-32818. Noble J V. Phys. Lett. B, 1980, 89: 325-32619. YAO J M et al. Chin. Phys. Lett., 2008, 25: 1629-1632

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SONG Chun-Yan and YAO Jiang-Ming. Polarization effect on the spin symmetry for anti-Lambda spectrum in ¹⁶O+Λ system[J]. Chinese Physics C, 2010, 34(9): 1425-1427. doi: 10.1088/1674-1137/34/9/061

SONG Chun-Yan and YAO Jiang-Ming. Polarization effect on the spin symmetry for anti-Lambda spectrum in ¹⁶O+Λ system[J]. Chinese Physics C, 2010, 34(9): 1425-1427. doi: 10.1088/1674-1137/34/9/061 shu

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Received: 2010-02-09
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Polarization effect on the spin symmetry for anti-Lambda spectrum in ¹⁶O+Λ system

Corresponding author: SONG Chun-Yan,

Received Date: 2010-02-09

Accepted Date: 1900-01-01

Available Online: 2010-09-05

Abstract:

The polarization effect on the spin symmetry for anti-Lambda spectrum in ¹⁶O+Λ system has been studied in relativistic mean-field theory. The PK1 effective interaction is used for nucleon-meson couplings and G-parity symmetry with a reduction factor ξ=0.3 is adopted for anti-Lambda-meson couplings. The energy differences between spin doublets in the anti-Lambda spectrum are around 0.10-0.73 MeV for p_Λ state. The dominant components of the Dirac spinor for the anti-Lambda spin doublets are found to be near identical. It indicates that the spin symmetry is still well-conserved against the polarization effect from the valence anti-Lambda hyperon, which leads to a highly compressed cold nucleus with the central density up to 2－3 times of saturated density.

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Polarization effect on the spin symmetry for anti-Lambda spectrum in ¹⁶O+Λ system

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Polarization effect on the spin symmetry for anti-Lambda spectrum in ¹⁶O+Λ system

Polarization effect on the spin symmetry for anti-Lambda spectrum in ¹⁶O+Λ system