Influence of Chiral Mean Field on Kaon In-plane Flow in Heavy Ion Collisions  

作　　者：ZHENGYu-Ming FUCHSChristian FAESSLERAmand SHEKHTERKirril SRISAWADPornrad KOBDAJChinorat YANYu-Peng 

机构地区：[1]ChinaInstituteofAtomicEnergy,P.O.Box275（18）,Beijing102413,China [2]4InstitutfǖrTheoretischePhysikderUniversitātTǖbingen,D-72076Tǖbingen,Germany [3]SchoolofPhysics,SuranarreUniversityofTechnology,NakhonRatchasima30000,Thailand

出　　处：《Communications in Theoretical Physics》2004年第5期746-750,共5页理论物理通讯（英文版）

基　　金：国家自然科学基金，德意志研究联合会资助项目，泰国国家研究理事会项目

摘　　要：The influence of the chiral mean field on the 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 in-medium kaon dynamics and strongly counterbalances the influence of the vector potential on the 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 in-plane flow.

关 键 词：kaon in-plane flow kaon mean field covariant kaon dynamics heavy ion collision 

分 类 号：O572.332[理学—粒子物理与原子核物理]