Phys. Rev. C
76,
052203(R)
(2007)
[4 pages]
Subthreshold production of Σ(1385) baryons in Al+Al collisions at 1.9A GeV
X. Lopez et al. FOPI Collaboration
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X. Lopez1,*, N. Herrmann2, P. Crochet3, A. Andronic1, V. Barret3, Z. Basrak4, N. Bastid3, M. L. Benabderrahmane2, P. Buehler5, M. Cargnelli5, R. Čaplar4, E. Cordier2, P. Dupieux3, M. Dželalija6, L. Fabbietti7, Z. Fodor8, I. Gašparić4, Y. Grishkin9, O. N. Hartmann1, K. D. Hildenbrand1, B. Hong10, T. I. Kang10, J. Kecskemeti8, M. Kirejczyk11, Y. J. Kim1, M. Kiš1,4, P. Koczon1, M. Korolija4, R. Kotte12, A. Lebedev9, Y. Leifels1, V. Manko13, J. Marton5, T. Matulewicz11, M. Merschmeyer2, W. Neubert12, D. Pelte2, M. Petrovici14, K. Piasecki11, F. Rami15, W. Reisdorf1, M. S. Ryu10, P. Schmidt5, A. Schüttauf1, Z. Seres8, B. Sikora11, K. S. Sim10, V. Simion14, K. Siwek-Wilczyńska11, V. Smolyankin9, G. Stoicea14, K. Suzuki7, Z. Tyminski11, P. Wagner15, E. Widmann5, K. Wiśniewski11, D. Wohlfarth12, Z. G. Xiao16, I. Yushmanov13, X. Y. Zhang16, A. Zhilin9, and J. Zmeskal5 (FOPI Collaboration)
P. Kienle5,7 and T. Yamazaki17
1Gesellschaft für Schwerionenforschung, Darmstadt, Germany
2Physikalisches Institut der Universität Heidelberg, Heidelberg, Germany
3Laboratoire de Physique Corpusculaire, IN2P3/CNRS, and Université Blaise Pascal, Clermont-Ferrand, France
4Ruđer Bošković Institute, Zagreb, Croatia
5Institut für Mittelenergie-Physik, Österreichische Akademie der Wissenschaften, Boltzmanngasse 3, A-1090, Wien, Austria
6University of Split, Split, Croatia
7Physik Department, Technische Universität München, D-85748 Garching, Germany
8KFKI Research Institute for Particle and Nuclear Physics, Budapest, Hungary
9Institute for Theoretical and Experimental Physics, Moscow, Russia
10Korea University, Seoul, Korea
11Institute of Experimental Physics, Warsaw University, Warsaw, Poland
12Institut für Strahlenphysik, Forschungszentrum Dresden-Rossendorf, Dresden, Germany
13Kurchatov Institute, Moscow, Russia
14Institute for Nuclear Physics and Engineering, Bucharest, Romania
15Institut Pluridisciplinaire Hubert Curien and Université Louis Pasteur, Strasbourg, France
16Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, People's Republic of China
17Heavy-Ion Nuclear Physics Laboratory, RIKEN, Wako, Saitama 351-0198, Japan
Received 15 March 2007; revised 14 September 2007; published 29 November 2007
First measurement of subthreshold Σ(1385) production is presented. Experimental data are presented for Al+Al reactions at 1.9A GeV measured with the FOPI detector at SIS/GSI. The Σ(1385)/Λ ratio is found to be in good agreement with the transport and statistical model predictions. The results allow for a better understanding of subthreshold strangeness production and strangeness exchange reaction which is the dominant process for K- production below and close-to threshold.
© 2007 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevC.76.052203
DOI:
10.1103/PhysRevC.76.052203
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