/ Experiment-Nucl

Subthreshold Ξ- Production in Collisions of p(3.5  GeV)+Nb

Agakishiev, G. (Dubna, JINR) ; Arnold, O. (Munich, Tech. U., Universe) ; Balanda, A. (Jagiellonian U.) ; Belver, D. (Santiago de Compostela U.) ; Belyaev, A. V. (Dubna, JINR) ; Berger-Chen, J. C. (Munich, Tech. U., Universe) ; Blanco, A. (LIP, Coimbra) ; Böhmer, M. (Munich, Tech. U.) ; Boyard, J. L. (Orsay, LPT) ; Cabanelas, P. (Santiago de Compostela U.) ; Chernenko, S. (Dubna, JINR) ; Dybczak, A. (Jagiellonian U.) ; Epple, E. (Munich, Tech. U., Universe) ; Fabbietti, L. (Munich, Tech. U., Universe) ; Fateev, O. V. (Dubna, JINR) ; Finocchiaro, P. (INFN, LNS) ; Fonte, P. (LIP, Coimbra) ; Friese, J. (Munich, Tech. U.) ; Fröhlich, I. (Frankfurt U.) ; Galatyuk, T. (Darmstadt, Tech. Hochsch.) ; Garzón, J. A. (Santiago de Compostela U.) ; Gernhäuser, R. (Munich, Tech. U.) ; Göbel, K. (Frankfurt U.) ; Golubeva, M. (Moscow, INR) ; González-Díaz, D. (Darmstadt, Tech. Hochsch.) ; Guber, F. (Moscow, INR) ; Gumberidze, M. (Orsay, LPT) ; Heinz, T. (Darmstadt, GSI) ; Hennino, T. (Orsay, LPT) ; Holzmann, R. (Darmstadt, GSI) ; Ierusalimov, A. (Dubna, JINR) ; Iori, I. (INFN, Milan) ; Ivashkin, A. (Moscow, INR) ; Jurkovic, M. (Munich, Tech. U.) ; Kämpfer, B. (Forschungszentrum Dresden Rossendorf) ; Karavicheva, T. (Moscow, INR) ; Koenig, I. (Darmstadt, GSI) ; Koenig, W. (Darmstadt, GSI) ; Kolb, B. W. (Darmstadt, GSI) ; Kornakov, G. (Santiago de Compostela U.) ; Kotte, R. (Forschungszentrum Dresden Rossendorf) ; Krása, A. (Rez, Nucl. Phys. Inst.) ; Krizek, F. (Rez, Nucl. Phys. Inst.) ; Krücken, R. (Munich, Tech. U.) ; Kuc, H. (Orsay, LPT) ; Kühn, W. (Giessen U.) ; Kugler, A. (Rez, Nucl. Phys. Inst.) ; Kurepin, A. (Moscow, INR) ; Ladygin, V. (Dubna, JINR) ; Lalik, R. (Munich, Tech. U., Universe) ; Lang, S. (Darmstadt, GSI) ; Lapidus, K. (Munich, Tech. U., Universe) ; Lebedev, A. (Moscow, ITEP) ; Liu, T. (Orsay, LPT) ; Lopes, L. (LIP, Coimbra) ; Lorenz, M. (Frankfurt U.) ; Maier, L. (Munich, Tech. U.) ; Mangiarotti, A. (LIP, Coimbra) ; Markert, J. (Frankfurt U.) ; Metag, V. (Giessen U.) ; Michalska, B. (Jagiellonian U.) ; Michel, J. (Frankfurt U.) ; Müntz, C. (Dubna, JINR) ; Müntzer, R. (Munich, Tech. U.) ; Naumann, L. (Forschungszentrum Dresden Rossendorf) ; Pachmayer, Y. C. (Frankfurt U.) ; Palka, M. (Jagiellonian U.) ; Parpottas, Y. (Cyprus U.) ; Pechenov, V. (Darmstadt, GSI) ; Pechenova, O. (Frankfurt U.) ; Pietraszko, J. (Darmstadt, GSI) ; Przygoda, W. (Jagiellonian U.) ; Ramstein, B. (Orsay, LPT) ; Reshetin, A. (Moscow, INR) ; Rustamov, A. (Frankfurt U.) ; Sadovsky, A. (Moscow, INR) ; Salabura, P. (Jagiellonian U.) ; Schmah, A. (Munich, Tech. U., Universe) ; Schwab, E. (Darmstadt, GSI) ; Siebenson, J. (Munich, Tech. U., Universe) ; Sobolev, Yu. G. (Rez, Nucl. Phys. Inst.) ; Spataro, S. (Giessen U.) ; Spruck, B. (Giessen U.) ; Ströbele, H. (Frankfurt U.) ; Stroth, J. (Darmstadt, GSI) ; Sturm, C. (Darmstadt, GSI) ; Tarantola, A. (Frankfurt U.) ; Teilab, K. (Frankfurt U.) ; Tlusty, P. (Rez, Nucl. Phys. Inst.) ; Traxler, M. (Darmstadt, GSI) ; Trebacz, R. (Jagiellonian U.) ; Tsertos, H. (Cyprus U.) ; Vasiliev, T. (Dubna, JINR) ; Wagner, V. (Rez, Nucl. Phys. Inst.) ; Weber, M. (Munich, Tech. U.) ; Wendisch, C. (Darmstadt, GSI) ; Wüstenfeld, J. (Forschungszentrum Dresden Rossendorf) ; Yurevich, S. (Darmstadt, GSI) ; Zanevsky, Y. V. (Dubna, JINR)

Published in: Phys.Rev.Lett.
Year: 2015
Vol.: 114    Num./Issue: 21
Page No: 212301
Pages: 7
Year: 2015-05-27 published

Abstract: Results on the production of the double strange cascade hyperon Ξ- are reported for collisions of p(3.5  GeV)+Nb, studied with the High Acceptance Di-Electron Spectrometer (HADES) at SIS18 at GSI Helmholtzzentrum for Heavy-Ion Research, Darmstadt. For the first time, subthreshold Ξ- production is observed in proton-nucleus interactions. Assuming a Ξ- phase-space distribution similar to that of Λ hyperons, the production probability amounts to PΞ-=[2.0±0.4(stat)±0.3(norm)±0.6(syst)]×10-4 resulting in a Ξ-/(Λ+Σ0) ratio of PΞ-/PΛ+Σ0=[1.2±0.3(stat)±0.4(syst)]×10-2. Available model predictions are significantly lower than the measured Ξ- yield.

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Total numbers of views: 721
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DOI: 10.1103/PhysRevLett.114.212301
 Record created 2015-06-01, last modified 2015-06-01

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