arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1003.4815nucl-th
收藏

用非线性$σ$ - $ω$ - $ρ$平均场模型和MIT-bag模型构造的Hardon-quark杂化星

Hardon-quark hybrid stars constructed by the nonlinear $σ$-$ω$-$ρ$ mean-field model and MIT-bag model

Schun T. Uechi, Hiroshi Uechi

摘要:

应用守恒的非线性$σ$ - $ω$-$ρ$强子平均场论,讨论了对称核物质和超子物质的饱和性质与密度的关系,以及强子-(奇异)夸克混合星的性质.非线性相互作用,将重整化为有效的耦合常数,有效质量和运动方程的来源是通过保持热力学一致性的平均场近似自洽地构建。比较了强子平均场模型和SU(6)夸克模型对矢量耦合常数的期望值,发现耦合常数对超子的有效质量和结合能、强子和强子-夸克星的性质都表现出不同的密度依赖性.采用非线性$σ$ - $ω$- $ρ$强子平均场近似(有或无真空涨落修正)和MIT-bag模型定义的奇异夸克物质,研究了强子-(奇异)夸克混合星的性质.我们发现强子-(奇异)夸克混合星在高密度下比纯强子和奇异夸克星更稳定。

英文摘要:

Density-dependent relations among saturation properties of symmetric nuclear matter and hyperonic matter, properties of hadron-(strange) quark hybrid stars are discussed by applying the conserving nonlinear $σ$-$ω$-$ρ$ hadronic mean-field theory. Nonlinear interactions that will be renormalized as effective coupling constants, effective masses and sources of equations of motion are constructed self-consistently by maintaining thermodynamic consistency to the mean-field approximation. The coupling constants expected from the hadronic mean-field model and SU(6) quark model for the vector coupling constants are compared; the coupling constants exhibit different density-dependent results for effective masses and binding energies of hyperons, properties of hadron and hadron-quark stars. The nonlinear $σ$-$ω$-$ρ$ hadronic mean-field approximation with or without vacuum fluctuation corrections and strange quark matter defined by MIT-bag model are employed to examine properties of hadron-(strange) quark hybrid stars. We have found that hadron-(strange) quark hybrid stars become more stable in high density compared to pure hadronic and strange quark stars.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑