Determination of N* amplitudes from associated strangeness production in p+p collisions

R. Münzer, L. Fabbietti, E. Epple, S. Lu, P. Klose, F. Hauenstein, N. Herrmann, D. Grzonka, Y. Leifels, M. Maggiora, D. Pleiner, B. Ramstein, J. Ritman, E. Roderburg, P. Salabura, A. Sarantsev, Z. Basrak, P. Buehler, M. Cargnelli, R. ČaplarH. Clement, O. Czerwiakowa, I. Deppner, M. Dželalija, W. Eyrich, Z. Fodor, P. Gasik, I. Gašparić, A. Gillitzer, Y. Grishkin, O. N. Hartmann, K. D. Hildenbrand, B. Hong, T. I. Kang, J. Kecskemeti, Y. J. Kim, M. Kirejczyk, M. Kiš, P. Koczon, R. Kotte, A. Lebedev, A. Le Fèvre, J. L. Liu, V. Manko, J. Marton, T. Matulewicz, K. Piasecki, F. Rami, A. Reischl, M. S. Ryu, P. Schmidt, Z. Seres, B. Sikora, K. S. Sim, K. Siwek-Wilczyńska, V. Smolyankin, K. Suzuki, Z. Tymiński, P. Wagner, I. Weber, E. Widmann, K. Wiśniewski, Z. G. Xiao, T. Yamasaki, I. Yushmanov, P. Wintz, Y. Zhang, A. Zhilin, V. Zinyuk, J. Zmeskal

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3 Citations (Scopus)

Abstract

We present the first determination of the energy-dependent amplitudes of N resonances extracted from their decay in KΛ pairs in p+p→pK+Λ reactions. A combined Partial Wave Analysis of seven data samples with exclusively reconstructed p+p→pK+Λ events measured by the COSY-TOF, DISTO, FOPI and HADES Collaborations in fixed target experiments at kinetic energies between 2.14 to 3.5 GeV is used to determine the amplitude of the resonant and non-resonant contributions into the associated strangeness final state. The contribution of seven N resonances with masses between 1650 MeV/c2 and 1900 MeV/c2 for an excess energy between 0 and 600 MeV has been considered. The Σ–p cusp and final state interactions for the p–Λ channel are also included as coherent contributions in the PWA. The N contribution is found to be dominant with respect to the phase space emission of the pKΛ+ final state at all energies demonstrating the important role played by both N and interference effects in hadron–hadron collisions.

Original languageEnglish
Pages (from-to)574-580
Number of pages7
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume785
DOIs
Publication statusPublished - 2018 Oct 10

Keywords

  • Hadrons
  • Hyperon–nucleon interaction
  • Partial wave analysis
  • Resonance
  • Scattering length
  • Strangeness

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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    Münzer, R., Fabbietti, L., Epple, E., Lu, S., Klose, P., Hauenstein, F., Herrmann, N., Grzonka, D., Leifels, Y., Maggiora, M., Pleiner, D., Ramstein, B., Ritman, J., Roderburg, E., Salabura, P., Sarantsev, A., Basrak, Z., Buehler, P., Cargnelli, M., ... Zmeskal, J. (2018). Determination of N* amplitudes from associated strangeness production in p+p collisions. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 785, 574-580. https://doi.org/10.1016/j.physletb.2018.08.068