Determination of N* amplitudes from associated strangeness production in p+p collisions
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 C...
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| Hauptverfasser: | , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
10 September 2018
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| In: |
Physics letters
Year: 2018, Jahrgang: 785, Pages: 574-580 |
| ISSN: | 1873-2445 |
| DOI: | 10.1016/j.physletb.2018.08.068 |
| Online-Zugang: | Verlag, Volltext: https://doi.org/10.1016/j.physletb.2018.08.068 Verlag, Volltext: http://www.sciencedirect.com/science/article/pii/S0370269318306877 
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| Verfasserangaben: | 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. Čaplar, H. 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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| 520 | |a 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. | ||
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