New data on (gamma)over-right-arrow(p)over-right-arrow -> eta p with polarized photons and protons and their implications for N* -> N eta decays

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New data on (gamma)over-right-arrow(p)over-right-arrow -> eta p with polarized photons and protons and their implications for N* -> N eta decays

JournalArticle (Originalarbeit in einer wissenschaftlichen Zeitschrift)

ID	4615993
Author(s)	Müller, J.; Hartmann, J.; Grüner, M.; Afzal, F.; Anisovich, V.; Bantes, B.; Bayadilov, D.; Beck, R.; Becker, M.; Beloglazov, Y.; Berlin, A.; Bichow, M.; Böse, S.; Brinkmann, K.-T.; Challand, T.; Crede, V.; Dietz, F.; Dieterle, M.; Drexler, P.; Dutz, H.; Eberhardt, H.; Elsner, D.; Ewald, R.; Fornet-Ponse, K.; Friedrich, S.; Frommberger, F.; Funke, C.; Gottschall, M.; Gridnev, A.; Goertz, S.; Gutz, E.; Hammann, C.; Hannen, V.; Hannappel, J.; Herick, J.; Hillert, W.; Hoffmeister, P.; Honisch, C.; Jahn, O.; Jude, T.; Jaegle, I.; Käser, A.; Kaiser, D.; Kalinowsky, H.; Kalischewski, F.; Kammer, S.; Keshelashvili, I.; Klassen, P.; Kleber, V.; Klein, F.; Klempt, E.; Koop, K.; Krusche, B.; Kube, M.; Lang, M.; Lopatin, I.; Maghrbi, Y.; Mahlberg, P.; Makonyi, K.; Messi, F.; Metag, V.; Meyer, W.; Müllers, J.; Nanova, M.; Nikonov, V.; Novinski, D.; Novotny, R.; Piontek, D.; Reicherz, G.; Rosenbaum, C.; Rostomyan, T.; Roth, B.; Sarantsev, A.; Schmidt, C.; Schmieden, H.; Schmitz, R.; Seifen, T.; Sokhoyan, V.; Thiel, A.; Thoma, U.; Urban, M.; van Pee, H.; Walther, D.; Wendel, C.; Wiedner, U.; Wilson, A.; Winnebeck, A.; Witthauer, L.
Author(s) at UniBasel	Krusche, Bernd
Year	2020
Title	New data on (gamma)over-right-arrow(p)over-right-arrow -> eta p with polarized photons and protons and their implications for N* -> N eta decays
Journal	Physics Letters B
Volume	803
Pages / Article-Number	135323
Abstract	The polarization observables T, E, P, H, and G in photoproduction of eta mesons off protons are measured for photon energies from threshold to W = 2400 MeV (T), 2280 MeV (E), 1620 MeV (P, H), or 1820 MeV (G), covering nearly the full solid angle. The data are compared to predictions from the SAID, MAID, JuBo, and BnGa partial-wave analyses. A refit within the BnGa approach including further data yields precise branching ratios for the N eta decay of nucleon resonances. A N eta-branching ratio of 0.33 +/- 0.04 for N(1650)1/2(-) is found, which reduces the large and controversially discussed N eta-branching ratio difference of the two lowest mass J(P) = 1/2(-) -resonances significantly. (C) 2020 The Authors. Published by Elsevier B.V.
Publisher	Elsevier
ISSN/ISBN	0370-2693
edoc-URL	https://edoc.unibas.ch/81878/
Full Text on edoc	No
Digital Object Identifier DOI	10.1016/j.physletb.2020.135323
ISI-Number	000521730300045
Document type (ISI)	article

02/05/2024

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