Resonances in forward pi(+)pi(-) photoproduction on hydrogen

0506048 - ÚJF 2020 RIV FR eng C - Konferenční příspěvek (zahraniční konf.)
Bibrzycki, L. - Bydžovský, Petr - Kaminski, R. - Szczepaniak, A. P.
Resonances in forward pi(+)pi(-) photoproduction on hydrogen.
EPJ Web of Conferences. Vol. 199. Les Ulis: E D P Sciences, 2019, č. článku 02009. ISSN 2100-014X.
[15th International Workshop on Meson Physics (MESON 2018). Krakow (PL), 07.06.2018-12.06.2018]
Institucionální podpora: RVO:61389005
Klíčová slova: photoproduction * cross section * baryon
Obor OECD: Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)

We show that the cross section of the Delta(1230) production in the gamma p -> p pi(+)pi(-) reaction at forward angles and with unpolarized photons can be described in terms of gauge invariant one pion t-channel exchange amplitudes. Proper description of the polarized cross sections requires, however, the inclusion of contributions from the baryon exchanges.
Trvalý link: http://hdl.handle.net/11104/0297341