Forward K+ Production in Subthreshold pA Collisions at 1.0 GeV

V. Koptev, M. Büscher, H. Junghans, M. Nekipelov, K. Sistemich, H. Ströher, V. Abaev, H. H. Adam, R. Baldauf, S. Barsov, U. Bechstedt, N. Bongers, G. Borchert, W. Borgs, W. Bräutigam, W. Cassing, V. Chernyshev, B. Chiladze, M. Debowski, J. DietrichM. Drochner, S. Dymov, J. Ernst, W. Erven, R. Esser, P. Fedorets, A. Franzen, D. Gotta, T. Grande, D. Grzonka, G. Hansen, M. Hartmann, V. Hejny, L. v. Horn, L. Jarczyk, A. Kacharava, B. Kamys, A. Khoukaz, T. Kirchner, S. Kistryn, F. Klehr, H. R. Koch, V. Komarov, S. Kopyto, R. Krause, P. Kravtsov, V. Kruglov, P. Kulessa, A. Kulikov, V. Kurbatov, N. Lang, N. Langenhagen, I. Lehmann, A. Lepges, J. Ley, B. Lorentz, G. Macharashvili, R. Maier, S. Martin, S. Merzliakov, K. Meyer, S. Mikirtychiants, H. Müller, P. Munhofen, A. Mussgiller, V. Nelyubin, M. Nioradze, H. Ohm, A. Petrus, D. Prasuhn, B. Prietzschk, H. J. Probst, D. Protic, K. Pysz, F. Rathmann, B. Rimarzig, Z. Rudy, R. Santo, H. Paetz, R. Schleichert, A. Schneider, Chr Schneider, H. Schneider, G. Schug, O. W.B. Schult, H. Seyfarth, A. Sibirtsev, J. Smyrski, H. Stechemesser, E. Steffens, H. J. Stein, A. Strzalkowski, K. H. Watzlawik, C. Wilkin, P. Wüstner, S. Yashenko, B. Zalikhanov, N. Zhuravlev, P. Zolnierczuk, K. Zwoll, I. Zychor

Research output: Contribution to journalArticlepeer-review

Abstract

K+-meson production in pA (A = C, Cu, Au) collisions has been studied using the ANKE spectrometer at an internal target position of the COSY-Jülich accelerator. The complete momentum spectrum of kaons emitted at forward angles, ϑ≤12°, has been measured for a beam energy of Tp = 1.0 GeV, far below the free NN threshold of 1.58 GeV. The spectrum does not follow a thermal distribution at low kaon momenta and the larger momenta reflect a high degree of collectivity in the target nucleus.

Original languageEnglish
JournalPhysical Review Letters
Volume87
Issue number2
DOIs
StatePublished - Jun 21 2001
Externally publishedYes

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