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 ene...
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| Main Authors: | , , , , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
13 May 2015
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| In: |
Physical review. C, Nuclear physics
Year: 2015, Volume: 91, Issue: 5 |
| ISSN: | 1089-490X |
| DOI: | 10.1103/PhysRevC.91.054904 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1103/PhysRevC.91.054904 Verlag, lizenzpflichtig, Volltext: https://link.aps.org/doi/10.1103/PhysRevC.91.054904 
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| Author Notes: | K. Piasecki, N. Herrmann, R. Averbeck, A. Andronic, V. Barret, Z. Basrak, N. Bastid, M.L. Benabderrahmane, M. Berger, P. Buehler, M. Cargnelli, R. Čaplar, P. Crochet, O. Czerwiakowa, I. Deppner, P. Dupieux, M. Dželalija, L. Fabbietti, Z. Fodor, P. Gasik, I. Gašparić, Y. Grishkin, O.N. Hartmann, K.D. Hildenbrand, B. Hong, T.I. Kang, J. Kecskemeti, Y.J. Kim, M. Kirejczyk, M. Kiš, P. Koczon, R. Kotte, A. Lebedev, Y. Leifels, A. Le Fèvre, J.L. Liu, X. Lopez, V. Manko, J. Marton, T. Matulewicz, R. Münzer, M. Petrovici, F. Rami, A. Reischl, W. Reisdorf, M.S. Ryu, P. Schmidt, A. Schüttauf, Z. Seres, B. Sikora, K. S. Sim, V. Simion, K. Siwek-Wilczyńska, V. Smolyankin, K. Suzuki, Z. Tymiński, P. Wagner, I. Weber, E. Widmann, K. Wiśniewski, Z.G. Xiao, I. Yushmanov, Y. Zhang, A. Zhilin, V. Zinyuk, and J. Zmeskal |
| Summary: | 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. |
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| Item Description: | Im Titel ist "phi" als griechischer Buchstabe dargestellt Gesehen am 20.07.2020 |
| Physical Description: | Online Resource |
| ISSN: | 1089-490X |
| DOI: | 10.1103/PhysRevC.91.054904 |