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Influence of phi mesons on negative kaons in Ni plus Ni collisions at 1.91A GeV beam energy

Authors
Piasecki, K.Herrmann, N.Averbeck, R.Andronic, A.Barret, V.Basrak, Z.Bastid, N.Benabderrahmane, M. L.Berger, M.Buehler, P.Cargnelli, M.Caplar, R.Crochet, P.Czerwiakowa, O.Deppner, I.Dupieux, P.Dzelalija, M.Fabbietti, L.Fodor, Z.Gasik, P.Gasparic, I.Grishkin, Y.Hartmann, O. N.Hildenbrand, K. D.Hong, B.Kang, T. I.Kecskemeti, J.Kim, Y. J.Kirejczyk, M.Kis, M.Koczon, P.Kotte, R.Lebedev, A.Leifels, Y.Le Fevre, A.Liu, J. L.Lopez, X.Manko, V.Marton, J.Matulewicz, T.Muenzer, R.Petrovici, M.Rami, F.Reischl, A.Reisdorf, W.Ryu, M. S.Schmidt, P.Schuettauf, A.Seres, Z.Sikora, B.Sim, K. S.Simion, V.Siwek-Wilczynska, K.Smolyankin, V.Suzuki, K.Tyminski, Z.Wagner, P.Weber, I.Widmann, E.Wisniewski, K.Xiao, Z. G.Yushmanov, I.Zhang, Y.Zhilin, A.Zinyuk, V.Zmeskal, J.
Issue Date
13-5월-2015
Publisher
AMER PHYSICAL SOC
Citation
PHYSICAL REVIEW C, v.91, no.5
Indexed
SCIE
SCOPUS
Journal Title
PHYSICAL REVIEW C
Volume
91
Number
5
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/93560
DOI
10.1103/PhysRevC.91.054904
ISSN
0556-2813
Abstract
phi and K- mesons from Ni + Ni collisions at the beam energy of 1.91A GeV have been measured by the FOPI spectrometer, with a trigger selecting central and semicentral events amounting to 52% of the total cross section. The phase-space distributions, and the total yield of K-, as well as the kinetic energy distribution and the total yield of f mesons are presented. The phi/K- ratio is found to be 0.44 +/- 0.07 (stat)(-0.10)(+0.16)(syst), meaning that about 22% of K- mesons originate from the decays of f mesons, occurring mostly in vacuum. The inverse slopes of direct kaons are up to about 15 MeV larger than the ones extracted within the one-source model, signaling that a considerable share of gap between the slopes of K+ and K- could be explained by the contribution of f mesons to negative kaons.
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