Effective Masses of Pentaquark Θ<SUP>+</SUP> in Nuclear Matter

GUO Yan-Rui; LI Xi-Guo; ZHONG Xian-Hui; LIU Zi-Yu; JIN Gen-Ming

Chinese Physics C> 2007, Vol. 31> Issue(8) : 724-730

Effective Masses of Pentaquark Θ⁺ in Nuclear Matter

Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China2 Graduate University of Chinese Academy of Sciences, Beijing 100049, China3 Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator of Lanzhou,Lanzhou 730000, China4 Department of Physics, Nankai University, Tianjin 300071, China

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The properties of baryons in nuclear matter are analysed in the relativistic mean-field theory(RMF). It is found that the scalar field σ meson affects the properties of baryon at high density. A density dependent scalar coupling gσN is determined according to the idea of quark-meson coupling model and extended to RMF. It is shown that gσN affects the property of nuclear matter weakly at low density, but strongly at high density. The relation between the scalar density ρ_S and the nuclear density ρ and the effective mass of the pentaquark Θ⁺ are studied with the density dependent coupling constant. The density dependent scalar coupling obviously affects the effective masses of baryons in nuclear matter, especially at high density.

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GUO Yan-Rui, LI Xi-Guo, ZHONG Xian-Hui, LIU Zi-Yu and JIN Gen-Ming. Effective Masses of Pentaquark Θ⁺ in Nuclear Matter[J]. Chinese Physics C, 2007, 31(8): 724-730.

GUO Yan-Rui, LI Xi-Guo, ZHONG Xian-Hui, LIU Zi-Yu and JIN Gen-Ming. Effective Masses of Pentaquark Θ⁺ in Nuclear Matter[J]. Chinese Physics C, 2007, 31(8): 724-730. shu

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Received: 2006-11-07
Revised: 2007-03-12

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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

Effective Masses of Pentaquark Θ⁺ in Nuclear Matter

Corresponding author: GUO Yan-Rui,

Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China2 Graduate University of Chinese Academy of Sciences, Beijing 100049, China3 Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator of Lanzhou,Lanzhou 730000, China4 Department of Physics, Nankai University, Tianjin 300071, China

Received Date: 2006-11-07

Accepted Date: 2007-03-12

Available Online: 2007-08-05

Abstract: The properties of baryons in nuclear matter are analysed in the relativistic mean-field theory(RMF). It is found that the scalar field σ meson affects the properties of baryon at high density. A density dependent scalar coupling gσN is determined according to the idea of quark-meson coupling model and extended to RMF. It is shown that gσN affects the property of nuclear matter weakly at low density, but strongly at high density. The relation between the scalar density ρ_S and the nuclear density ρ and the effective mass of the pentaquark Θ⁺ are studied with the density dependent coupling constant. The density dependent scalar coupling obviously affects the effective masses of baryons in nuclear matter, especially at high density.

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Effective Masses of Pentaquark Θ⁺ in Nuclear Matter