Influence of Phi mesons on negative kaons in Ni + Ni collisions at 1.91A GeV beam energy (CROSBI ID 221054)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Piasecki, K. ; Herrmann, K. ; Averbeck, R. ; Andronic, A. ; Barret, V. ; Basrak, Zoran ; Bastid, N. ; Benabderrahmane, M.L., Berger, M. ; Buehler, P ; Cargnelli, M. ; Čaplar, Roman ; Crochet, P. ; Czerwiakowa, O. ; Deppner, I. ; Dupieux, P. ; Dželalija, Mile ; Fabbietti, L. ; Fodor, Z. ; Gasik, P. ; Gašparić, Igor ; Grishkin, Y. ; Hartmann, O.N. ; Hildenbrand, K.D. ; Hong, B. ; Kang, T.I. ; Kecskemeti, J. ; Kim, Y.J. ; Kirejczyk, M. ; Kiš, Mladen ; Koczon, P. ; Kotte, R. ; Lebedev, A. ; Leifels, Y. ; Le Fèvre, A. ; Liu, J.L. ; Lopez, X. ; Manko, V. ; Marton, J. ; Matulewicz, T. ; Münzer, R. ; Petrovici, M. ; Rami, F. ; Reischl, A. ; Reisdorf, W. ; Ryu, M.S. ; Schmidt, P. ; Schüttauf, A. ; Seres, Z. ; Sikora, B. ; Sim, K.S. ; Simion, V. ; Siwek-Wilczyńska, K. ; Smolyankin, V. ; Suzuki, K. ; Tymiński, Z. ; Wagner, P. ; Weber, Ivana ; Widmann, E. ; Wiśniewski, K. ; Xiao, Z.G ; Yushmanov, I. ; Zhang, Y. ; Zhilin, A. ; Zinyuk, V. ; Zmeskal, J.
engleski
Influence of Phi mesons on negative kaons in Ni + Ni collisions at 1.91A GeV beam energy
ϕ 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 ϕ mesons are presented. The ϕ/ K− ratio is found to be 0.44±0.07(stat)+0.16−0.10(syst), meaning that about 22% of K−mesons originate from the decays of ϕ 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 ϕ mesons to negative kaons.
Heavy ion reactions; Negative Kaons; Phi mesons
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Podaci o izdanju
91 (5)
2015.
054904-1-054904-8
objavljeno
0556-2813
10.1103/PhysRevC.91.054904
