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Article ; Online: Strong Absorption of Hadrons with Hidden and Open Strangeness in Nuclear Matter.

Adamczewski-Musch, J / Arnold, O / Atomssa, E T / Behnke, C / Belounnas, A / Belyaev, A / Berger-Chen, J C / Biernat, J / Blanco, A / Blume, C / Böhmer, M / Chernenko, S / Chlad, L / Chudoba, P / Ciepał, I / Deveaux, C / Dittert, D / Dreyer, J / Epple, E /
Fabbietti, L / Fateev, O / Fonte, P / Franco, C / Friese, J / Fröhlich, I / Galatyuk, T / Garzón, J A / Gernhäuser, R / Golubeva, M / Greifenhagen, R / Guber, F / Gumberidze, M / Harabasz, S / Heinz, T / Hennino, T / Höhne, C / Holzmann, R / Ierusalimov, A / Ivashkin, A / Kämpfer, B / Kardan, B / Koenig, I / Koenig, W / Kolb, B W / Korcyl, G / Kornakov, G / Kornas, F / Kotte, R / Kuboś, J / Kugler, A / Kunz, T / Kurepin, A / Kurilkin, A / Kurilkin, P / Ladygin, V / Lalik, R / Lapidus, K / Lebedev, A / Linev, S / Lopes, L / Lorenz, M / Mahmoud, T / Maier, L / Malige, A / Markert, J / Maurus, S / Metag, V / Michel, J / Mihaylov, D M / Mikhaylov, V / Morozov, S / Müntz, C / Münzer, R / Naumann, L / Nowakowski, K / Parpottas, Y / Pechenov, V / Pechenova, O / Petukhov, O / Pietraszko, J / Prozorov, A P / Przygoda, W / Ramstein, B / Rathod, N / Reshetin, A / Rodriguez-Ramos, P / Rost, A / Sadovsky, A / Salabura, P / Scheib, T / Schmidt-Sommerfeld, K / Schuldes, H / Schwab, E / Scozzi, F / Seck, F / Sellheim, P / Siebenson, J / Silva, L / Smyrski, J / Spataro, S / Spies, S / Ströbele, H / Stroth, J / Strzempek, P / Sturm, C / Svoboda, O / Szala, M / Tlusty, P / Traxler, M / Tsertos, H / Ungethüm, C / Vázquez Doce, O / Wagner, V / Wendisch, C / Wiebusch, M G / Wirth, J / Wójcik, D / Zanevsky, Y / Zumbruch, P / Curceanu, C / Piscicchia, K / Scordo, A

Physical review letters

2015  Volume 123, Issue 2, Page(s) 22002

Abstract: We present the first observation of K^{-} and ϕ absorption within nuclear matter by means of π^{-}-induced reactions on C and W targets at an incident beam momentum of 1.7  GeV/c studied with HADES at SIS18/GSI. The double ratio (K^{-}/K^{+})_{W}/(K^{-}/ ... ...

Abstract We present the first observation of K^{-} and ϕ absorption within nuclear matter by means of π^{-}-induced reactions on C and W targets at an incident beam momentum of 1.7  GeV/c studied with HADES at SIS18/GSI. The double ratio (K^{-}/K^{+})_{W}/(K^{-}/K^{+})_{C} is found to be 0.319±0.009(stat)_{-0.012}^{+0.014}(syst) indicating a larger absorption of K^{-} in heavier targets as compared to lighter ones. The measured ϕ/K^{-} ratios in π^{-}+C and π^{-}+W reactions within the HADES acceptance are found to be equal to 0.55±0.04(stat)_{-0.07}^{+0.06}(syst) and to 0.63±0.06(stat)_{-0.11}^{+0.11}(syst), respectively. The similar ratios measured in the two different reactions demonstrate for the first time experimentally that the dynamics of the ϕ meson in nuclear medium is strongly coupled to the K^{-} dynamics. The large difference in the ϕ production off C and W nuclei is discussed in terms of a strong ϕN in-medium coupling. These results are relevant for the description of heavy-ion collisions and the structure of neutron stars.
Language English
Publishing date 2015-09-30
Publishing country United States
Document type Journal Article
ZDB-ID 208853-8
ISSN 1079-7114 ; 0031-9007
ISSN (online) 1079-7114
ISSN 0031-9007
DOI 10.1103/PhysRevLett.123.022002
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