2020 Impact factor 3.043
Hadrons and Nuclei

Eur. Phys. J. A 9, 515-519

Direct comparison of phase-space distributions of K- and K+ mesons in heavy-ion collisions at SIS energies -- evidence for in-medium modifications of kaons?

K. Wisniewski1,2 - P. Crochet3 - N. Herrmann1,4 - A. Andronic1 - R. Averbeck1 - A. Devismes1 - C. Finck1 - A. Gobbi1 - O. Hartmann1 - K.D. Hildenbrand1 - P. Koczon1 - T. Kress1 - R. Kutsche1 - Y. Leifels1,4 - W. Reisdorf1 - D. Schüll1 - J.P. Alard3 - V. Barret3 - Z. Basrak6 - N. Bastid3 - I. Belyaev7 - A. Bendarag3 - G. Berek8 - R. Caplar6 - N. Cindro6 - P. Dupieux3 - M. Dzelalija6 - M. Eskef4 - Z. Fodor8 - Y. Grishkin7 - B. Hong9 - J. Kecskemeti8 - Y.J. Kim9 - M. Kirejczyk2 - M. Korolija6 - R. Kotte10 - M. Kowalczyk2 - A. Lebedev7 - K.S. Lee9 - V. Manko11 - H. Merlitz4 - S. Mohren4 - D. Moisa5 - W. Neubert10 - A. Nianine11 - D. Pelte4 - M. Petrovici5 - C. Plettner10 - F. Rami12 - B. de Schauenburg12 - Z. Seres8 - B. Sikora2 - K.S. Sim9 - V. Simion5 - K. Siwek-Wilczynska2 - V. Smolyankin7 - A. Somov7 - M. Stockmeier4 - G. Stoicea5 - M. Vasiliev11 - P. Wagner12 - D. Wohlfarth10 - J.T. Yang9 - I. Yushmanov11 - A. Zhilin7
The FOPI Collaboration

1 Gesellschaft für Schwerionenforschung, Darmstadt, Germany
2 Institute of Experimental Physics, Warsaw University, Poland
3 Laboratoire de Physique Corpusculaire, IN2P3/CNRS and Université Blaise Pascal, Clermont-Ferrand, France
4 Physikalisches Institut der Universität Heidelberg, Heidelberg, Germany
5 National Institute for Nuclear Physics and Engineering, Bucharest, Romania
6 Rudjer Boskovic Institute, Zagreb, Croatia
7 Institute for Theoretical and Experimental Physics, Moscow, Russia
8 KFKI Research Institute for Particle and Nuclear Physics, Budapest, Hungary
9 Korea University, Seoul, South Korea
10 Forschungszentrum Rossendorf, Dresden, Germany
11 Kurchatov Institute, Moscow, Russia
12 Institut de Recherches Subatomiques, IN2P3-CNRS and Université Louis Pasteur, Strasbourg, France

Received: 30 November 1998 / Revised version: 31 August 2000
Communicated by D. Guerreau

Abstract
The ratio of K- to K+-meson yields has been measured in the systems 96Ru + 96Ru at 1.69 A GeV, 96Ru+96Zr at 1.69 A GeV, and 58Ni+58Ni at 1.93 A GeV incident beam kinetic energy. The yield ratio is observed to vary across the measured phase space. Relativistic transport-model calculations indicate that the data are best understood if in-medium modifications of the kaons are taken into account.

PACS
25.75.-q Relativistic heavy-ion collisions - 25.75.Dw Particle and resonance production


Copyright Società Italiana di Fisica, Springer-Verlag 2000