Observation of different azimuthal emission patterns of K+ and of K- mesons in heavy-ion collisions at 1-2 A GeV.
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.
Uhlig
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Technische Universität Darmstadt, D-64289 Darmstadt, Germany.
Förster
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A
Böttcher
I
I
Debowski
M
M
Dohrmann
F
F
Grosse
E
E
Koczoń
P
P
Kohlmeyer
B
B
Laue
F
F
Menzel
M
M
Naumann
L
L
Oeschler
H
H
Scheinast
W
W
Schwab
E
E
Senger
P
P
Shin
Y
Y
Ströbele
H
H
Sturm
C
C
Surówka
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G
Wagner
A
A
Waluś
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W