Measurement of the quasi free np -> np pi(+)pi(-) and np -> pp pi(-)pi(0) reactions at 1.25 GeV with HADES

0486398 - ÚJF 2018 RIV FR eng C - Konferenční příspěvek (zahraniční konf.)
Kurilkin, A. - Arnold, O. - Atomssa, E. T. - Krása, Antonín - Křížek, Filip - Kugler, Andrej - Sobolev, Yuri, G. - Svoboda, Ondřej - Tlustý, Pavel - Wagner, Vladimír … celkem 105 autorů
Measurement of the quasi free np -> np pi(+)pi(-) and np -> pp pi(-)pi(0) reactions at 1.25 GeV with HADES.
EPJ Web of Conferences. Vol. 81. Les Ulis: EDP Sciences, 2014, č. článku 02009. ISSN 2100-014X.
[13th International Workshop on Production, Properties and Interaction of Mesons. Cracow (PL), 29.05.2014-03.06.2014]
Institucionální podpora: RVO:61389005
Klíčová slova: spectrometers * pp * HADES
Obor OECD: Nuclear physics

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 pi(+)pi(-) and pi(-)pi(0) 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 (Delta Delta, N(1440), N(1520), Delta(1600)). The invariant mass and angular distributions from the np -> np pi(+)pi(-) and np -> pp pi(-)pi(0) reactions are compared with different theoretical model predictions.
Trvalý link: http://hdl.handle.net/11104/0281220