Year: 2019
Type: article
Abstract: We present the first observation of ${K}^{\ensuremath{-}}$ and $\ensuremath{\phi}$ absorption within nuclear matter by means of ${\ensuremath{\pi}}^{\ensuremath{-}}$-induced reactions on C and W targets at an incident beam momentum of $1.7\text{ }\text{ }\mathrm{GeV}/c$ studied with HADES at $\mathrm{SIS}18/\mathrm{GSI}$. The double ratio $({K}^{\ensuremath{-}}/{K}^{+}{)}_{\mathrm{W}}/({K}^{\ensuremath{-}}/{K}^{+}{)}_{\mathrm{C}}$ is found to be $0.319\ifmmode\pm\else\textpm\fi{}0.009(\mathrm{stat}{)}_{\ensuremath{-}0.012}^{+0.014}(\mathrm{syst})$ indicating a larger absorption of ${K}^{\ensuremath{-}}$ in heavier targets as compared to lighter ones. The measured $\ensuremath{\phi}/{K}^{\ensuremath{-}}$ ratios in ${\ensuremath{\pi}}^{\ensuremath{-}}+\mathrm{C}$ and ${\ensuremath{\pi}}^{\ensuremath{-}}+\mathrm{W}$ reactions within the HADES acceptance are found to be equal to $0.55\ifmmode\pm\else\textpm\fi{}0.04(\mathrm{stat}{)}_{\ensuremath{-}0.07}^{+0.06}(\mathrm{syst})$ and to $0.63\ifmmode\pm\else\textpm\fi{}0.06(\mathrm{stat}{)}_{\ensuremath{-}0.11}^{+0.11}(\mathrm{syst})$, respectively. The similar ratios measured in the two different reactions demonstrate for the first time experimentally that the dynamics of the $\ensuremath{\phi}$ meson in nuclear medium is strongly coupled to the ${K}^{\ensuremath{-}}$ dynamics. The large difference in the $\ensuremath{\phi}$ production off C and W nuclei is discussed in terms of a strong $\ensuremath{\phi}N$ in-medium coupling. These results are relevant for the description of heavy-ion collisions and the structure of neutron stars.
Source: Physical Review Letters
Authors: J. Adamczewski-Musch, O. Arnold, E. T. Atomssa, C. Behnke, A. Belounnas, A. Belyaev, J. C. Berger-Chen, J. Biernat, A. Blanco, C. Blume, M. Böhmer, S. Chernenko, L. Chlad, P. Chudoba, I. Ciepał, C. Deveaux, D. Dittert, J. Dreyer, E. Epple, L. Fabbietti, O. Fateev, P. Fonte, C. Franco, J. Friese, I. Fröhlich, T. Galatyuk, J. A. Garzón, R. Gernhäuser, M. Golubeva, R. Greifenhagen, F. Guber, M. Gumberidze, S. Harabasz, T. Heinz, T. Hennino, C. Höhne, R. Holzmann, A. Ierusalimov, A. Ivashkin, B. Kämpfer, B. Kardan, I. Koenig, W. Koenig, B. W. Kolb, G. Korcyl, G. Kornakov, F. Kornas, R. Kotte, J. Kuboś, A. Kugler, T. Kunz, A. Kurepin, A. Kurilkin, P. Kurilkin, V. Ladygin, R. Lalik, K. Lapidus, A. Lebedev, S. Linev, L. Lopes, M. Lorenz, T. Mahmoud, L. Maier, A. Malige, J. Markert, S. Maurus, V. Metag, J. Michel, D. M. Mihaylov, V. Mikhaylov, S. Morozov, C. Müntz, R. Münzer, L. Naumann, K. Nowakowski, Y. Parpottas, V. Pechenov, O. Pechenova, O. Petukhov, J. Pietraszko, A. P. Prozorov, W. Przygoda, B. Ramstein, N. Rathod, A. Reshetin, P. Rodriguez-Ramos, A. Rost, A. Sadovsky, P. Salabura, T. Scheib, K. Schmidt-Sommerfeld, H. Schuldes, E. Schwab, F. Scozzi, F. Seck, P. Sellheim, J. Siebenson, L. Silva, J. Smyrski, S. Spataro, S. Spies, H. Ströbele, J. Stroth, P. Strzempek, C. Sturm, O. Svoboda, M. Szala, P. Tlusty, M. Traxler, H. Tsertos, C. Ungethüm, O. Vázquez Doce, V. Wagner, C. Wendisch, M. G. Wiebusch, J. Wirth, D. Wójcik, Y. Zanevsky, P. Zumbruch, C. Curceanu, K. Piscicchia, A. Scordo
Institutions: GSI Helmholtz Centre for Heavy Ion Research, Technical University of Munich, Université Paris-Sud, Centre National de la Recherche Scientifique, Université Paris-Saclay, Institut National de Physique Nucléaire et de Physique des Particules, Goethe University Frankfurt, Joint Institute for Nuclear Research, Jagiellonian University, LIP - Laboratory of Instrumentation and Experimental Particle Physics, Czech Academy of Sciences, Czech Academy of Sciences, Nuclear Physics Institute, Institute of Nuclear Physics, Polish Academy of Sciences, Justus-Liebig-Universität Gießen, Technische Universität Darmstadt, Helmholtz-Zentrum Dresden-Rossendorf, Universidade de Santiago de Compostela, Russian Academy of Sciences, Institute for Nuclear Research, Institute for Theoretical and Experimental Physics, National Research Nuclear University MEPhI, University of Cyprus, University of Turin, University of Warsaw, Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati, Centro Ricerche Enrico Fermi
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Funders: Deutsche Forschungsgemeinschaft, Ministerstvo Školství, Mládeže a Tělovýchovy, Bundesministerium für Bildung und Forschung, Ministry of Education and Science of the Russian Federation, Narodowe Centrum Nauki, Centre National de la Recherche Scientifique, Technische Universität Darmstadt, National Research Nuclear University MEPhI, Institut National de Physique Nucléaire et de Physique des Particules
Awards: Facility for Antiproton and Ion Research – participation of the Czech Republic, G5439022519, G6353074492, G6452044459, Investigation of baryonic systems at FAIR international research facility, G6782686219, G7003517107, Verbundprojekt 05P2015 - CBM R&D: Kaon- und Antikaon-Produktion in pion-induzierten Reaktionen bei HADES
OpenAlex ID: W2904048587