arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1007.3630nucl-thastro-ph.HE
收藏

扩展手征($σ,π,ω$)平均场模型中强子的手征粒子方法

Chiral-particle Approach to Hadrons in an Extended Chiral ($σ,π,ω$) Mean-Field Model

Schun T. Uechi, Hiroshi Uechi

摘要:

手征非线性($σ,π,ω$)平均场模型是守恒非线性(非手征)$σ$ - $ω$强子平均场模型的推广,它是强子的热力学相容的、相对论的和洛伦兹协变的平均场论.在扩展手征($σ,π,ω$)平均场模型中,强子的所有质量都是通过手征对称性破缺机制产生的,这与其它手征伙伴模型不同。通过比较非手征平均场近似和手征平均场近似,研究了手征对称性破缺对核物质、超子物质和中子星中$σ$介子质量、非线性相互作用系数、超子与核子耦合比以及费米液体性质的影响.

英文摘要:

The chiral nonlinear ($σ,π,ω$) mean-field model is an extension of the conserving nonlinear (nonchiral) $σ$-$ω$ hadronic mean-field model which is thermodynamically consistent, relativistic and Lorentz-covariant mean-field theory of hadrons. In the extended chiral ($σ,π,ω$) mean-field model, all the masses of hadrons are produced by chiral symmetry breaking mechanism, which is different from other conventional chiral partner models. By comparing both nonchiral and chiral mean-field approximations, the effects of chiral symmetry breaking to the mass of $σ$-meson, coefficients of nonlinear interactions, coupling ratios of hyperons to nucleons and Fermi-liquid properties are investigated in nuclear matter, hyperonic matter, and neutron 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。

↑