K+'s Collective Flow in Heavy-ion Collisions predicted by Covariant Kaon Dynamics

TL;DR

This paper demonstrates that covariant kaon dynamics, including the Lorentz force, effectively reproduces experimental flow data of K+ mesons in heavy-ion collisions, highlighting the importance of relativistic effects.

Contribution

It introduces the use of covariant kaon dynamics with the Lorentz force to accurately model K+ flow in heavy-ion collisions, emphasizing the role of the space-like vector potential.

Findings

Lorentz force is essential for matching experimental flow data.

Sensitivity of K+ flow to Lorentz force near target rapidity.

Qualitative agreement with experimental data achieved.

Abstract

The directed and elliptic flows of positively charged Kaon produced in $^{58}_{28}$Ni + $^{58}_{28}$Ni reaction at incident kinetic energy 1.91 AGeV, experimental data are released newly by V. Zinyuk,et.al. in Ref.[arXiv: 1403.1504v2 [nucl-ex] 8 Apr 2014], are reproduced by using the covariant kaon dynamics. Our numerical results indicate qualitatively the Lorentz force is necessary to explained reasonably the data as soon as the space-like part of kaon's vector potential is involved. The sensitivity of $K^+$ directed as well as differential directed flow on the Lorentz force are also observed near target rapidity.