Centrality dependence of subthreshold phi meson production in Ni plus Ni collisions at 1.9A GeV (CROSBI ID 230785)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Piasecki, K. ; Tyminski, Z. ; Herrmann, N. ; Averbeck, R. ; Andronic, A. ; Barret, V. ; Basrak, Zoran ; Bastid, N. ; Benabderrahmane, M.L. ; Berger, M. ; Buehler, P. ; Cargnelli, M. ; Čaplar, Roman ; Cordier, E. ; 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. ; Korolija, Milorad ; Kotte, R. ; Lebedev, A. ; Leifels, Y. ; Le Fevre, A. ; Liu, J.L. ; Lopez, X. ; Mangiarotti, A. ; Manko, V. ; Marton, J. ; Matulewicz, T. ; Merschmeyer, M. ; Munzer, R. ; Pelte, D. ; Petrovici, M. ; Rami, F. ; Reischl, A. ; Reisdorf, W. ; Ryu, M.S. ; Schmidt, P. ; Schuttauf, A. ; Seres, Z. ; Sikora, B. ; Sim, K.S. ; Simion, V. ; Siwek- Wilczynska, K. ; Smolyankin, V. ; Stoicea, G. ; Suzuki, K. ; Wagner, P. ; Weber, Ivana ; Widmann, E. ; Wisniewski, K. ; Xiao, Z.G. ; Xu, H.S. ; Yushmanov, I. ; Zhang, Y. ; Zhilin, A. ; Zinyuk, V. ; Zmeskal, J.
FOPI Collaboration
engleski
Centrality dependence of subthreshold phi meson production in Ni plus Ni collisions at 1.9A GeV
We analyzed the ϕ meson production in central Ni + Ni collisions at a beam kinetic energy of 1.93A GeV with the FOPI spectrometer and found a production probability per event of [8.6±1.6(stat) ±1.5(syst)]×10−4. This new data point allows us for the first time to inspect the centrality dependence of subthreshold ϕ meson production in heavy-ion collisions. The rise of ϕ meson multiplicity per event with mean number of participants can be parametrized by a power function with exponent α=1.8±0.6. The ratio of ϕ to K− production yields seems not to depend, within the experimental uncertainties, on the collision centrality, and the average of measured values was found to be 0.36±0.05.
heavy-ion collisions ; ni-58+ni-58 collisions ; sis energies ; 2 agev ; strangeness ; symmetry ; detector ; kaons ; fopi
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