2005/02/02 by Xi-Guo Lee, Yuan Gao, Lee, Xi-Guo +1
Physics and Astronomy · #FOS: Physical sciences #High-Energy Particle Collisions Research #Nuclear Theory (nucl-th) #Pulsars and Gravitational Waves Research #Quantum Chromodynamics and Particle Interactions #nucl-th
paper · pdf · doi:10.48550/arxiv.nucl-th/0502010
11 pages, 6 figures
openalex publication_date 2005/02/02 · arxiv created 2005/02/09 · arxiv updated 2009/12/01 · openalex created_date 2024/04/11 · openalex updated_date 2026/07/28
The density dependent relativistic hadron field theory(DDRH) is extended to inclusions of pentaquark Θ+. We investigate In-medium properties of Θ+ and nucleons. As well as the neutron and proton,the effective Θ+ mass decreases as the baryon density increases,and remains larger than nucleons'. The effective mass of Θ+ is calculated,M^*Θ+≃0.71MΘ+ at normal nuclear density with the fraction of Θ+ 0.2. The effective masses of all baryon increase with the increasing fraction of Θ+. The binding energy is also studied. We find the binding energy is much larger than it in nuclear matter without Θ+,and then discuss the stability of the system with conclusions of pentaquark Θ+. It is shown that the system becomes bounder added small fraction of Θ+. Finally we discuss the condition when the system is the most stable and calculate the minimum of binding energy and the fractions of all baryons as functions of baryon density.