Centrality dependence of subthreshold φ meson production in Ni + Ni collisions at 1.9A GeV

FOPI Collaboration

Research output: Contribution to journalArticle

Abstract

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.

Original languageEnglish (US)
Article number014901
JournalPhysical Review C
Volume94
Issue number1
DOIs
StatePublished - Jul 5 2016

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mesons
collisions
ionic collisions
kinetic energy
exponents
spectrometers

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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Centrality dependence of subthreshold φ meson production in Ni + Ni collisions at 1.9A GeV. / FOPI Collaboration.

In: Physical Review C, Vol. 94, No. 1, 014901, 05.07.2016.

Research output: Contribution to journalArticle

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title = "Centrality dependence of subthreshold φ meson production in Ni + Ni collisions at 1.9A GeV",
abstract = "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.",
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T1 - Centrality dependence of subthreshold φ meson production in Ni + Ni collisions at 1.9A GeV

AU - FOPI Collaboration

AU - Piasecki, K.

AU - Tymiński, Z.

AU - Herrmann, N.

AU - Averbeck, R.

AU - Andronic, A.

AU - Barret, V.

AU - Basrak, Z.

AU - Bastid, N.

AU - Lotfi Benabderrhmane, Mohamed

AU - Berger, M.

AU - Buehler, P.

AU - Cargnelli, M.

AU - Čaplar, R.

AU - Cordier, E.

AU - Crochet, P.

AU - Czerwiakowa, O.

AU - Deppner, I.

AU - Dupieux, P.

AU - DŽelalija, M.

AU - Fabbietti, L.

AU - Fodor, Z.

AU - Gasik, P.

AU - Gašparić, I.

AU - Grishkin, Y.

AU - Hartmann, O. N.

AU - Hildenbrand, K. D.

AU - Hong, B.

AU - Kang, T. I.

AU - Kecskemeti, J.

AU - Kim, Y. J.

AU - Kirejczyk, M.

AU - Kiš, M.

AU - Koczon, P.

AU - Korolija, M.

AU - Kotte, R.

AU - Lebedev, A.

AU - Leifels, Y.

AU - Le Fèvre, A.

AU - Liu, J. L.

AU - Lopez, X.

AU - Mangiarotti, A.

AU - Manko, V.

AU - Marton, J.

AU - Matulewicz, T.

AU - Merschmeyer, M.

AU - Münzer, R.

AU - Pelte, D.

AU - Petrovici, M.

AU - Rami, F.

AU - Reischl, A.

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N2 - 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.

AB - 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.

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U2 - 10.1103/PhysRevC.94.014901

DO - 10.1103/PhysRevC.94.014901

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