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arXiv · 1505.06184

K*(892)+ production in proton-proton collisions at E_beam = 3.5 GeV

HADES Collaboration·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·D. Mihaylov·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·S. Spataro·B. Spruck·H. Ströbele·J. Stroth·C. Sturm·O. Svoboda·A. Tarantola·K. Teilab·P. Tlusty·M. Traxler·H. Tsertos·T. Vasiliev·V. Wagner·M. Weber·C. Wendisch·J. Wüstenfeld·S. Yurevich·Y. Zanevsky
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Abstract

We present results on the K*(892)+ production in proton-proton collisions at a beam energy of E = 3.5 GeV, which is hitherto the lowest energy at which this mesonic resonance has been observed in nucleon-nucleon reactions. The data are interpreted within a two-channel model that includes the 3-body production of K*(892)+ associated with the Lambda- or Sigma-hyperon. The relative contributions of both channels are estimated. Besides the total cross section sigma(p+p -> K*(892)+ + X) = 9.5 +- 0.9 +1.1 -0.9 +- 0.7 mub, that adds a new data point to the excitation function of the K*(892)+ production in the region of low excess energy, transverse momenta and angular spectra are extracted and compared with the predictions of the two-channel model. The spin characteristics of K*(892)+ are discussed as well in terms of the spin-alignment.

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HADES Collaboration, 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, D. Mihaylov, 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, S. Spataro, B. Spruck, H. Ströbele, J. Stroth, C. Sturm, O. Svoboda, A. Tarantola, K. Teilab, P. Tlusty, M. Traxler, H. Tsertos, T. Vasiliev, V. Wagner, M. Weber, C. Wendisch, J. Wüstenfeld, S. Yurevich, Y. Zanevsky. 2015-05-22. K*(892)+ production in proton-proton collisions at E_beam = 3.5 GeV. https://doi.org/10.1103/physrevc.92.024903

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