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? - The FOPI Collaboration

K. Wiśniewski - et al.

doi:doi:10.1007/s100500070008

2021 Impact factor 3.131

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. Wisniewski^1,2 - P. Crochet³ - N. Herrmann^1,4 - A. Andronic¹ - R. Averbeck¹ - A. Devismes¹ - C. Finck¹ - A. Gobbi¹ - O. Hartmann¹ - K.D. Hildenbrand¹ - P. Koczon¹ - T. Kress¹ - R. Kutsche¹ - Y. Leifels^1,4 - 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