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Associate K0 production in p+p collisions at 3.5 GeV: The role of Δ(1232)++

  • G. Agakishiev
  • , O. Arnold
  • , D. Belver
  • , A. Belyaev
  • , J. C. Berger-Chen
  • , A. Blanco
  • , M. Böhmer
  • , J. L. Boyard
  • , P. Cabanelas
  • , S. Chernenko
  • , A. Dybczak
  • , E. Epple
  • , L. Fabbietti
  • , O. Fateev
  • , P. Finocchiaro
  • , P. Fonte
  • , J. Friese
  • , I. Fröhlich
  • , T. Galatyuk
  • , J. A. Garzón
  • R. Gernhäuser, K. Göbel, M. Golubeva, D. González-Díaz, F. Guber, M. Gumberidze, T. Heinz, T. Hennino, R. Holzmann, A. Ierusalimov, I. Iori, A. Ivashkin, M. Jurkovic, B. Kämpfer, T. Karavicheva, I. Koenig, W. Koenig, B. W. Kolb, G. Korcyl, G. Kornakov, R. Kotte, A. Krása, F. Krizek, R. Krücken, H. Kuc, W. Kühn, A. Kugler, T. Kunz, A. Kurepin, V. Ladygin, R. Lalik, K. Lapidus, A. Lebedev, L. Lopes, M. Lorenz, L. Maier, A. Mangiarotti, J. Markert, V. Metag, J. Michel, C. Müntz, R. Münzer, L. Naumann, Y. C. Pachmayer, M. Palka, Y. Parpottas, V. Pechenov, O. Pechenova, J. Pietraszko, W. Przygoda, B. Ramstein, A. Reshetin, A. Rustamov, A. Sadovsky, P. Salabura, A. Schmah, E. Schwab, J. Siebenson, Yu G. Sobolev, B. Spruck, H. Ströbele, J. Stroth, C. Sturm, A. Tarantola, K. Teilab, P. Tlusty, M. Traxler, H. Tsertos, T. Vasiliev, V. Wagner, M. Weber, C. Wendisch, J. Wüstenfeld, S. Yurevich, Y. Zanevsky
  • Joint Inst. for Nuclear Research
  • Cluster of Excellence E-conversion
  • Technical University of Munich
  • Universidad de Santiago de Compostela
  • LIP-Laboratorio de Instrumentacao e Fisica Experimental de Particulas
  • University Paris-Sud
  • Jagiellonian University
  • Laboratori Nazionali Del Sud
  • Coimbra Polytechnic - ISEC
  • Johann Wolfgang Goethe University
  • Technische Universität Darmstadt
  • GSI Helmholtz Center
  • Institute for Nuclear Research of the Russian Academy of Sciences
  • INFN Sezione di Milano
  • University of Milan
  • HelmholtzZentrum Dresden-Rossendorf
  • Technische Universität Dresden
  • Nuclear Physics Institute of the Cas
  • Justus-Liebig-Universität Gießen
  • ITEP
  • University of Cyprus
  • Frederick University
  • Lawrence Berkeley National Laboratory

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

An exclusive analysis of the four-body final states Λ+p+π++K0 and Σ0+p+π++K0 measured with HADES for p+p collisions at a beam kinetic energy of 3.5 GeV is presented. The analysis uses various phase space variables, such as missing mass and invariant mass distributions, in the four-particle event selection (p,π+,π+,π-) to find cross sections of the different production channels, contributions of the intermediate resonances Δ++ and Σ(1385)+, and corresponding angular distributions. A dominant resonant production is seen, where the reaction Λ+Δ+++K0 has a cross section about ten times higher (29.45±0.08-1.46+1.67±2.06μb) than the analogous nonresonant reaction (2.57±0.02-1.98+0.21±0.18μb). A similar result is obtained in the corresponding Σ0 channels with 9.26±0.05-0.31+1.41±0.65μb in the resonant and 1.35±0.02-1.35+0.10±0.09μb in the nonresonant reactions.

Original languageEnglish
Article number015202
JournalPhysical Review C - Nuclear Physics
Volume90
Issue number1
DOIs
StatePublished - 9 Jul 2014

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