In-Medium Effective of Pentaquark Θ+ in the Density Dependent Relativistic Hadron Field Theory

GAO Yuan; LI Xi-Guo; LI Yong-Qing; LIU Jian-Ye

Chinese Physics C> 2005, Vol. 29> Issue(11) : 1067-1070

In-Medium Effective of Pentaquark Θ+ in the Density Dependent Relativistic Hadron Field Theory

Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China2 Center of Theoretical Nuclear Physics,National Laboratory of Heavy Ion Collisions,Lanzhou 730000,China3 Graduate University of Chinese Academy of Sciences,Beijing 100049,China

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The density dependent relativistic hadron field theory is extended to inclusions of pentaquark Θ⁺. We have investigated the mass modifications of nucleons and pentaquark Θ⁺ in the framework of relativistic mean field theory. We find that the effective mass, of either the nucleon or the pentaquark Θ⁺ decreases as baryon density increases. We have studied the effects of the fractions of Θ⁺ and neutron on the baryon masses. We also discussed the relations between scale density ρ_S and vector density ρ_B at different baryon fractions.

References

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GAO Yuan, LI Xi-Guo, LI Yong-Qing and LIU Jian-Ye. In-Medium Effective of Pentaquark Θ+ in the Density Dependent Relativistic Hadron Field Theory[J]. Chinese Physics C, 2005, 29(11): 1067-1070.

GAO Yuan, LI Xi-Guo, LI Yong-Qing and LIU Jian-Ye. In-Medium Effective of Pentaquark Θ+ in the Density Dependent Relativistic Hadron Field Theory[J]. Chinese Physics C, 2005, 29(11): 1067-1070. shu

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Received: 2005-02-03
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

In-Medium Effective of Pentaquark Θ+ in the Density Dependent Relativistic Hadron Field Theory

Corresponding author: LI Xi-Guo,

Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China2 Center of Theoretical Nuclear Physics,National Laboratory of Heavy Ion Collisions,Lanzhou 730000,China3 Graduate University of Chinese Academy of Sciences,Beijing 100049,China

Received Date: 2005-02-03

Accepted Date: 1900-01-01

Available Online: 2005-11-05

Abstract: The density dependent relativistic hadron field theory is extended to inclusions of pentaquark Θ⁺. We have investigated the mass modifications of nucleons and pentaquark Θ⁺ in the framework of relativistic mean field theory. We find that the effective mass, of either the nucleon or the pentaquark Θ⁺ decreases as baryon density increases. We have studied the effects of the fractions of Θ⁺ and neutron on the baryon masses. We also discussed the relations between scale density ρ_S and vector density ρ_B at different baryon fractions.

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In-Medium Effective of Pentaquark Θ+ in the Density Dependent Relativistic Hadron Field Theory

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