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- Measurement of the quasi free np → npπ+π− and np → ppπ−π0 reactions at 1.25 GeV with HADES (2014)
- Alexei Kurilkin Oliver Arnold Ermias T. Atomssa Claudia Behnke Alexander Belyaev Jia Chii Berger-Chen Jacek Biernat Alberto Blanco Christoph Blume Michael Böhmer Paula Bordalo Sergey Chernenko Christina Deveaux Adrian Dybczak Eliane Epple Laura Fabbietti Oleg Fateev Paulo Fonte Celso Franco Jürgen Friese Ingo Fröhlich Tetyana Galatyuk Juan A. Garzón Katharina Gill Marina Golubeva Diego González-Díaz Fedor Guber Malgorzata Gumberidze Szymon Harabasz Thierry Hennino Claudia Höhne Romain Holzmann Alexander Ierusalimov Alexander Ivashkin Martin Jurkovic Burkhard Kämpfer Tatiana Karavicheva Behruz Kardan Ilse Koenig Wolfgang Koenig Burkhard W. Kolb Grzegorz Korcyl Georgy Kornakov Roland Kotte Antonin Krása Erik Krebs Filip Krizek Hubert Kuc Andrej Kugler Tobias Kunz Alexei Kurepin Pavel Kurilkin Vladimir Ladygin Rafal Lalik Simon Lang Kirill Lapidus Alexander Lebedev Luís Lopes Manuel Lorenz Ludwig Maier A. Mangiarotti Jochen Markert Volker Metag Jan Michel Christian Müntz Robert Münzer Lothar Naumann Marek Palka Vladimir Pechenov Olga Pechenova Vlasios Petousis Jerzy Pietraszko Witold Przygoda Béatrice Ramstein Laura Rehnisch Andrey Reshetin Adrian Rost Anar Rustamov Alexander Sadovsky Piotr Salabura Timo Scheib Korbinian Schmidt-Sommerfeld Heidi Schuldes Patrick Sellheim Johannes Siebenson Luis Silva Yuri Sobolev Stefano Spataro Herbert Ströbele Joachim Stroth Pawel Strzempek Christian Sturm Ondřej Svoboda Attilio Tarantola Khaled Teilab Pavel Tlusty Michael Traxler Haralabos Tsertos Taras Vasiliev Vladimir Wagner Christian Wendisch Joana Wirth Jörn Wüstenfeld Sergey Yurevich Yuri Zanevsky
- We present the results of two-pion production in tagged quasi-free np collisions at a deutron incident beam energy of 1.25 GeV/c measured with the High-Acceptance Di-Electron Spectrometer (HADES) installed at GSI. The specific acceptance of HADES allowed for the first time to obtain high-precision data on π+π− and π−π0 production in np collisions in a region corresponding to large transverse momenta of the secondary particles. The obtained differential cross section data provide strong constraints on the production mechanisms and on the various baryon resonance contributions (∆∆, N(1440), N(1520), ∆(1600)). The invariant mass and angular distributions from the np → npπ+π −and np → ppπ−π0 reactions are compared with different theoretical model predictions.
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