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

被引：8

作者：

Piasecki, K. ^{[1
]}

Tyminski, Z. ^{[1
,2
]}

Herrmann, N. ^{[3
]}

Averbeck, R. ^{[4
]}

Andronic, A. ^{[4
]}

Barret, V. ^{[5
,6
]}

Basrak, Z. ^{[7
]}

Bastid, N. ^{[5
,6
]}

Benabderrahmane, M. L. ^{[3
]}

Berger, M. ^{[8
,9
]}

Buehler, P. ^{[10
]}

Cargnelli, M. ^{[10
]}

Caplar, R.

Cordier, E. ^{[3
]}

Crochet, P. ^{[5
,6
]}

Czerwiakowa, O. ^{[1
]}

Deppner, I. ^{[3
]}

Dupieux, P. ^{[5
,6
]}

Dzelalija, M. ^{[11
]}

Fabbietti, L. ^{[8
,9
]}

Fodor, Z. ^{[12
]}

Gasik, P. ^{[1
,8
,9
]}

Gasparic, I. ^{[7
]}

Grishkin, Y. ^{[13
]}

Hartmann, O. N. ^{[4
]}

Hildenbrand, K. D. ^{[4
]}

Hong, B. ^{[14
]}

Kang, T. I. ^{[14
]}

Kecskemeti, J. ^{[12
]}

Kim, Y. J. ^{[4
]}

Kirejczyk, M. ^{[1
,2
]}

Kis, M. ^{[4
,7
]}

Koczon, P. ^{[4
]}

Korolija, M. ^{[7
]}

Kotte, R. ^{[15
]}

Lebedev, A. ^{[13
]}

Leifels, Y. ^{[4
]}

Le Fevre, A. ^{[4
]}

Liu, J. L. ^{[3
,16
]}

Lopez, X. ^{[5
,6
]}

Mangiarotti, A. ^{[3
]}

Manko, V. ^{[17
]}

Marton, J. ^{[10
]}

Matulewicz, T. ^{[1
]}

Merschmeyer, M. ^{[3
]}

Muenzer, R. ^{[9
]}

Pelte, D. ^{[3
]}

Petrovici, M. ^{[18
]}

Rami, F.

Reischl, A. ^{[3
]}

机构：

[1] Univ Warsaw, Fac Phys, Inst Expt Phys, Warsaw, Poland

[2] Natl Ctr Nucl Res, Otwock, Poland

[3] Heidelberg Univ, Phys Inst, Heidelberg, Germany

[4] GSI Helmholtzzentrum Schwerionenforsch GmbH, Darmstadt, Germany

[5] CNRS, IN2P3, Lab Phys Corpusculaire, Clermont Ferrand, France

[6] Univ Clermont Ferrand, Clermont Ferrand, France

[7] Rudjer Boskovic Inst, Zagreb, Croatia

[8] Tech Univ Munich, Excellence Cluster Univ, Garching, Germany

[9] Tech Univ Munich, Phys Dept, E12, Garching, Germany

[10] Austrian Acad Sci, Stefan Meyer Inst Subatomare Phys, Vienna, Austria

[11] Univ Split, Split, Croatia

[12] RMKI, Wigner RCP, Budapest, Hungary

[13] Inst Theoret & Expt Phys, Moscow, Russia

[14] Korea Univ, Seoul, South Korea

[15] Helmholtz Zentrum Dresden Rossendorf, Inst Strahlenphys, Dresden, Germany

[16] Harbin Inst Technol, Harbin, Peoples R China

[17] Kurchatov Inst, Natl Res Ctr, Moscow, Russia

[18] Inst Nucl Phys & Engn, Bucharest, Romania

[19] Inst Pluridisciplinaire Hubert Curien, Strasbourg, France

[20] Univ Strasbourg, Strasbourg, France

[21] Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China

[22] Chinese Acad Sci, Inst Modern Phys, Lanzhou, Peoples R China

来源：

PHYSICAL REVIEW C | 2016年 / 94卷 / 01期

关键词：

HEAVY-ION COLLISIONS; NI-58+NI-58 COLLISIONS; SIS ENERGIES; AGEV; STRANGENESS; SYMMETRY; DETECTOR; KAONS; FOPI;

D O I：

10.1103/PhysRevC.94.014901

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

We analyzed the phi 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)] x 10(-4). This new data point allows us for the first time to inspect the centrality dependence of subthreshold phi meson production in heavy-ion collisions. The rise of phi meson multiplicity per event with mean number of participants can be parametrized by a power function with exponent alpha = 1.8 +/- 0.6. The ratio of phi 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.

引用

页数：8

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