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Azimuthal emission patterns of K+ and of K- mesons in Ni plus Ni collisions near the strangeness production threshold

Authors
Zinyuk, V.Kang, T. I.Leifels, Y.Herrmann, N.Hong, B.Averbeck, R.Andronic, A.Barret, V.Basrak, Z.Bastid, N.Benabderrahmane, M. L.Berger, M.Buehler, P.Cargnelli, M.Caplar, R.Carevic, I.Crochet, P.Deppner, I.Dupieux, P.Dzelalija, M.Fabbietti, L.Fodor, Z.Gasik, P.Gasparic, I.Grishkin, Y.Hartmann, O. N.Hildenbrand, K. D.Kecskemeti, J.Kim, Y. J.Kirejczyk, M.Kis, M.Koczon, P.Kotte, R.Lebedev, A.Le Fevre, A.Liu, J. L.Lopez, X.Manko, V.Marton, J.Matulewicz, T.Muenzer, R.Petrovici, M.Piasecki, K.Rami, F.Reischl, A.Reisdorf, W.Ryu, M. S.Schmidt, P.Schuettauf, A.Seres, Z.Sikora, B.Sim, K. S.Simion, V.Siwek-Wilczynka, K.Smolyankin, V.Suzuki, K.Tyminski, Z.Wagner, P.Widmann, E.Wisniewski, K.Xiao, Z. G.Yushmanov, I.Zhang, Y.Zhilin, A.Zmeskal, J.
Issue Date
25-8월-2014
Publisher
AMER PHYSICAL SOC
Citation
PHYSICAL REVIEW C, v.90, no.2
Indexed
SCIE
SCOPUS
Journal Title
PHYSICAL REVIEW C
Volume
90
Number
2
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/97665
DOI
10.1103/PhysRevC.90.025210
ISSN
0556-2813
Abstract
Azimuthal emission patterns of K-+/- mesons have been measured in Ni + Ni collisions with the FOPI spectrometer at a beam kinetic energy of 1.91 A GeV. The transverse momentum p(T) integrated directed and elliptic flow of K+ and K- mesons as well as the centrality dependence of p(T) - differential directed flow of K+ mesons are compared to the predictions of hadron string dynamics and isospin quantum molecular dynamics transport models. The data exhibits different propagation patterns of K+ and K- mesons in the compressed and heated nuclear medium and favor the existence of a kaon-nucleon in-medium potential, repulsive for K+ mesons and attractive for K- mesons.
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