The influence of the chiral mean field on the K+ in-plane flow in heavy ion collisions at SIS energy is investigated within covariant kaon dynamics. For the kaon mesons inside the nuclear medium a quasi-particle pictu...The influence of the chiral mean field on the K+ in-plane flow in heavy ion collisions at SIS energy is investigated within covariant kaon dynamics. For the kaon mesons inside the nuclear medium a quasi-particle picture including scalar and vector fields is adopted and compared to the standard treatment with a static potential. It is confirmed that a Lorentz force from spatial component of the vector field provides an important contribution to the inmedium kaon dynamics and strongly counterbalances the influence of the vector potential on the K+ in-plane flow. The calculated results show that the new FOPI data can be reasonably described using the Brown & Rho parametrization,which partly takes into account the correction of higher order contributions in the chiral expansion. This indicates that one can abstract the information on the kaon potential in a nuclear medium from the analysis of the K+ in-plane flow.展开更多
我们在[5]中考察了形如(?)(t)=f(x(?))的泛函微分方程,其中 f 是互助映射(依 Smith[9]).本文在对 f 的更一般的假定下继续上述研究,新的假定使得方程(?)(t)=f(x(?))生成所谓 K 型单调半流,它以 Smith[8]所考察的 K 型单调系统作为其特款...我们在[5]中考察了形如(?)(t)=f(x(?))的泛函微分方程,其中 f 是互助映射(依 Smith[9]).本文在对 f 的更一般的假定下继续上述研究,新的假定使得方程(?)(t)=f(x(?))生成所谓 K 型单调半流,它以 Smith[8]所考察的 K 型单调系统作为其特款,本文的主要结果(定理4)给出了方程的解具有某种全局渐近稳定性的充分条件.展开更多
文摘The influence of the chiral mean field on the K+ in-plane flow in heavy ion collisions at SIS energy is investigated within covariant kaon dynamics. For the kaon mesons inside the nuclear medium a quasi-particle picture including scalar and vector fields is adopted and compared to the standard treatment with a static potential. It is confirmed that a Lorentz force from spatial component of the vector field provides an important contribution to the inmedium kaon dynamics and strongly counterbalances the influence of the vector potential on the K+ in-plane flow. The calculated results show that the new FOPI data can be reasonably described using the Brown & Rho parametrization,which partly takes into account the correction of higher order contributions in the chiral expansion. This indicates that one can abstract the information on the kaon potential in a nuclear medium from the analysis of the K+ in-plane flow.
文摘我们在[5]中考察了形如(?)(t)=f(x(?))的泛函微分方程,其中 f 是互助映射(依 Smith[9]).本文在对 f 的更一般的假定下继续上述研究,新的假定使得方程(?)(t)=f(x(?))生成所谓 K 型单调半流,它以 Smith[8]所考察的 K 型单调系统作为其特款,本文的主要结果(定理4)给出了方程的解具有某种全局渐近稳定性的充分条件.
