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Influence of φ mesons on negative kaons in Ni + Ni collisions at 1.91A GeV beam energy INFLUENCE of φ MESONS on NEGATIVE KAONS in ⋯ K. PIASECKI et al.

  • 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. Wis̈niewski, Z. G. Xiao, I. Yushmanov, Y. Zhang, A. Zhilin, V. Zinyuk, J. Zmeskal
  • University of Warsaw
  • Heidelberg University 
  • GSI Helmholtz Centre for Heavy Ion Research
  • Laboratoire de Physique de Clermont
  • Ruder Boskovic Institute
  • Technische Universität München
  • Technical University of Munich
  • Austrian Academy of Sciences
  • University of Split
  • Wigner Research Centre for Physics
  • Alikhanov Institute for Theoretical and Experimental Physics
  • Korea University
  • Helmholtz-Zentrum Dresden-Rossendorf
  • Russian Research Centre Kurchatov Institute
  • Horia Hulubei National Institute of Physics and Nuclear Engineering
  • Université de Strasbourg
  • Tsinghua University
  • CAS - Institute of Modern Physics

Research output: Contribution to journalArticlepeer-review

Abstract

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)-0.10+0.16(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.

Original languageEnglish
Article number054904
JournalPhysical Review C - Nuclear Physics
Volume91
Issue number5
DOIs
StatePublished - 13 May 2015

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