Observation of Different Azimuthal Emission Patterns of K+ and of K- Mesons in Heavy-Ion Collisions at 1–2A GeV

F. Uhlig, A. Förster, I. Böttcher, M. Dębowski, F. Dohrmann, E. Grosse, P. Koczoń, B. Kohlmeyer, F. Laue, M. Menzel, L. Naumann, H. Oeschler (+9 others)
2005 Physical Review Letters  
Azimuthal distributions of pi+, K+ and K- mesons have been measured in Au+Au reactions at 1.5 AGeV and Ni+Ni reactions at 1.93 AGeV. In semi-central collisions at midrapidity, pi+ and K+ mesons are emitted preferentially perpendicular to the reaction plane in both collision systems. In contrast for K- mesons in Ni+Ni reactions an in-plane elliptic flow was observed for the first time at these incident energies.
doi:10.1103/physrevlett.95.012301 pmid:16090609 fatcat:hqzltubuyvcrpccrnpqnyl2uqe