title: Observation of different azimuthal emission patterns of K+ and of K- mesons in heavy-ion collisions at 1-2 A GeV.
abstract: Azimuthal distributions of pi+, K+, and K- mesons have been measured in Au+Au reactions at 1.5A GeV and Ni+Ni reactions at 1.93 A GeV. In semicentral 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.
authors.affiliation: Technische Universität Darmstadt, D-64289 Darmstadt, Germany.
authors.forename: F
authors.initials: F
authors.lastname: Uhlig
authors.forename: A
authors.initials: A
authors.lastname: Förster
authors.forename: I
authors.initials: I
authors.lastname: Böttcher
authors.forename: M
authors.initials: M
authors.lastname: Debowski
authors.forename: F
authors.initials: F
authors.lastname: Dohrmann
authors.forename: E
authors.initials: E
authors.lastname: Grosse
authors.forename: P
authors.initials: P
authors.lastname: Koczoń
authors.forename: B
authors.initials: B
authors.lastname: Kohlmeyer
authors.forename: F
authors.initials: F
authors.lastname: Laue
authors.forename: M
authors.initials: M
authors.lastname: Menzel
authors.forename: L
authors.initials: L
authors.lastname: Naumann
authors.forename: H
authors.initials: H
authors.lastname: Oeschler
authors.forename: W
authors.initials: W
authors.lastname: Scheinast
authors.forename: E
authors.initials: E
authors.lastname: Schwab
authors.forename: P
authors.initials: P
authors.lastname: Senger
authors.forename: Y
authors.initials: Y
authors.lastname: Shin
authors.forename: H
authors.initials: H
authors.lastname: Ströbele
authors.forename: C
authors.initials: C
authors.lastname: Sturm
authors.forename: G
authors.initials: G
authors.lastname: Surówka
authors.forename: A
authors.initials: A
authors.lastname: Wagner
authors.forename: W
authors.initials: W
authors.lastname: Waluś