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arXiv · 2003.13057

Differential Cross Sections for Neutron-Proton Scattering in the Region of the $d^*(2380)$ Dibaryon Resonance

P. Adlarson·W. Augustyniak·W. Bardan·M. Bashkanov·F. S. Bergmann·M. Berłowski·H. Bhatt·M. Büscher·H. Calén·I. Ciepał·H. Clement·D. Coderre·E. Czerwiński·K. Demmich·E. Doroshkevich·R. Engels·A. Erven·W. Erven·W. Eyrich·P. Fedorets·K. Föhl·K. Fransson·F. Goldenbaum·P. Goslawski·A. Goswami·K. Grigoryev·C. --O. Gullström·F. Hauenstein·L. Heijkenskjöld·V. Hejny·M. Hodana·B. Höistad·N. Hüsken·A. Jany·B. R. Jany·T. Johansson·B. Kamys·G. Kemmerling·F. A. Khan·A. Khoukaz·D. A. Kirillov·S. Kistryn·H. Kleines·B. Kłos·M. Krapp·W. Krzemień·P. Kulessa·A. Kupść·K. Lalwani·D. Lersch·B. Lorentz·A. Magiera·R. Maier·P. Marciniewski·B. Mariański·M. Mikirtychiants·H. -P. Morsch·P. Moskal·H. Ohm·I. Ozerianska·E. Perez del Rio·N. M. Piskunov·P. Podkopał·D. Prasuhn·A. Pricking·K. Pysz·A. Pyszniak·C. F. Redmer·J. Ritman·A. Roy·Z. Rudy·S. Sawant·S. Schadmand·T. Sefzick·V. Serdyuk·R. Siudak·T. Skorodko·M. Skurzok·J. Smyrski·V. Sopov·R. Stassen·J. Stepaniak·E. Stephan·G. Sterzenbach·H. Stockhorst·H. Ströher·A. Szczurek·A. Täschner·A. Trzciński·R. Varma·M. Wolke·A. Wrońska·P. Wüstner·P. Wurm·A. Yamamoto·L. Yurev·J. Zabierowski·A. Zink·J. Złomańczuk·P. {Ż}uprański
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Abstract

Differential cross sections have been extracted from exclusive and kinematically complete high-statistics measurements of quasifree polarized $\vec{n}p$ scattering performed in the energy region of the $d^*(2380)$ dibaryon resonance covering the the range of beam energies $T_n$ = 0.98 - 1.29 GeV ($\sqrt s$ = 2.32 - 2.44 GeV). The experiment was carried out with the WASA-at-COSY setup having a polarized deuteron beam impinged on the hydrogen pellet target and utilizing the quasifree process $dp \to np + p_{spectator}$. That way the $np$ differential cross section $\sigma(\Theta)$ was measured over a large angular range. The obtained angular distributions complement the corresponding analyzing power $A_y(\Theta)$ measurements published previously. A SAID partial-wave analysis incorporating the new data strengthens the finding of a resonance pole in the coupled $^3D_3 - ^3G_3$ waves.

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P. Adlarson, W. Augustyniak, W. Bardan, M. Bashkanov, F. S. Bergmann, M. Berłowski, H. Bhatt, M. Büscher, H. Calén, I. Ciepał, H. Clement, D. Coderre, E. Czerwiński, K. Demmich, E. Doroshkevich, R. Engels, A. Erven, W. Erven, W. Eyrich, P. Fedorets, K. Föhl, K. Fransson, F. Goldenbaum, P. Goslawski, A. Goswami, K. Grigoryev, C. --O. Gullström, F. Hauenstein, L. Heijkenskjöld, V. Hejny, M. Hodana, B. Höistad, N. Hüsken, A. Jany, B. R. Jany, T. Johansson, B. Kamys, G. Kemmerling, F. A. Khan, A. Khoukaz, D. A. Kirillov, S. Kistryn, H. Kleines, B. Kłos, M. Krapp, W. Krzemień, P. Kulessa, A. Kupść, K. Lalwani, D. Lersch, B. Lorentz, A. Magiera, R. Maier, P. Marciniewski, B. Mariański, M. Mikirtychiants, H. -P. Morsch, P. Moskal, H. Ohm, I. Ozerianska, E. Perez del Rio, N. M. Piskunov, P. Podkopał, D. Prasuhn, A. Pricking, K. Pysz, A. Pyszniak, C. F. Redmer, J. Ritman, A. Roy, Z. Rudy, S. Sawant, S. Schadmand, T. Sefzick, V. Serdyuk, R. Siudak, T. Skorodko, M. Skurzok, J. Smyrski, V. Sopov, R. Stassen, J. Stepaniak, E. Stephan, G. Sterzenbach, H. Stockhorst, H. Ströher, A. Szczurek, A. Täschner, A. Trzciński, R. Varma, M. Wolke, A. Wrońska, P. Wüstner, P. Wurm, A. Yamamoto, L. Yurev, J. Zabierowski, A. Zink, J. Złomańczuk, P. {Ż}uprański. 2020-03-29. Differential Cross Sections for Neutron-Proton Scattering in the Region of the $d^*(2380)$ Dibaryon Resonance. https://doi.org/10.1103/physrevc.102.015204

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