Enhanced Out-of-plane Emission of K+ Mesons observed in Au+Au Collisions   at 1 AGeV
  The azimuthal angular distribution of K+ mesons has been measured in Au + Au collisions at 1 AGeV. In peripheral and semi-central collisions, K+ mesons preferentially are emitted perpendicular to the reaction plane. The strength of the azimuthal anisotropy of K+ emission is comparable to the one of pions. No in-plane flow was found for K+ mesons near projectile and target rapidity. 
Y.Shin, W.Ahner, R.Barth, P.Beckerle, D.Brill, M.Cieslak, M.Debowski,   E.Grosse, P.Koczon, B.Kohlmeyer, M.Mang, D.Miskowiec...