Chinese Physics C > 2002, Vol. 26 > Issue(10): 1050-1055

Hyperon rms Radii of_Λ²⁰⁸Pb and Neutron Star Structure

Department of Technical Physics,Peking University,Beijing 100871,China2 Institute of Morden Physics,Southwest Jiaotong University,Chengdu 610031,China3 Institute of Theoretical Physics,Chinese Academy of Sciences,Beijing 100080,China4 Center of Theoretical Nuclear Physics,National Laboratory of Heavy Ion Accelerator,Lanzhou 730000,China

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Abstract：
The hyperon rms radii in _Λ ²⁰⁸Pb and neutron star structure have been studied in the framework of the relativistic mean field theory with nucleons,hyperons and mesons. Attention has been paid on the hyperon coupling constants which can not be accurately determined experimentally. A new relation between the hyperon rms radius in hypernucleus and the properties of a neutron star is proposed,i.e.,the larger the hyperon rms radius,the larger the maximum mass and radius of the star. Further accurate measurement of the hyperon rms radius in _Λ ²⁰⁸Pb will have important implications for the structure of neutron stars.

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JIA Huan-Yu, LV Hong-Feng and MENG Jie. Hyperon rms Radii of _Λ ²⁰⁸Pb and Neutron Star Structure[J]. Chinese Physics C, 2002, 26(10): 1050-1055.

JIA Huan-Yu, LV Hong-Feng and MENG Jie. Hyperon rms Radii of _Λ ²⁰⁸Pb and Neutron Star Structure[J]. Chinese Physics C, 2002, 26(10): 1050-1055. shu

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Received: 2001-11-06
Revised: 1900-01-01

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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

Hyperon rms Radii of_Λ²⁰⁸Pb and Neutron Star Structure

Corresponding author:JIA Huan-Yu,

Department of Technical Physics,Peking University,Beijing 100871,China2 Institute of Morden Physics,Southwest Jiaotong University,Chengdu 610031,China3 Institute of Theoretical Physics,Chinese Academy of Sciences,Beijing 100080,China4 Center of Theoretical Nuclear Physics,National Laboratory of Heavy Ion Accelerator,Lanzhou 730000,China

Received Date:2001-11-06

Accepted Date:1900-01-01

Available Online:2002-10-05

Abstract:The hyperon rms radii in_Λ²⁰⁸Pb and neutron star structure have been studied in the framework of the relativistic mean field theory with nucleons,hyperons and mesons. Attention has been paid on the hyperon coupling constants which can not be accurately determined experimentally. A new relation between the hyperon rms radius in hypernucleus and the properties of a neutron star is proposed,i.e.,the larger the hyperon rms radius,the larger the maximum mass and radius of the star. Further accurate measurement of the hyperon rms radius in_Λ²⁰⁸Pb will have important implications for the structure of neutron stars.

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Hyperon rms Radii of_Λ²⁰⁸Pb and Neutron Star Structure

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