caa a22 4500 445872241 CHVBK 20180317145515.0 cr unu---uuuuu 170323e20111201xx s 000 0 eng 10.1140/epja/i2011-11153-9 doi (NATIONALLICENCE)springer-10.1140/epja/i2011-11153-9 Nucleon resonances in the fourth-resonance region [Elektronische Daten] [A. Anisovich, E. Klempt, V. Nikonov, A. Sarantsev, U. Thoma] Nucleon and $ \Delta$ resonances in the fourth-resonance region are studied in a multichannel partial-wave analysis which includes nearly all available data on pion- and photo-induced reactions off protons. In the high-mass range, above 1850MeV, several alternative solutions yield a good description of the data. For these solutions, masses, widths, pole residues and photocouplings are given. In particular, we find evidence for nucleon resonances with spin-parities $\ensuremath J^{P}=1/2^{+},\ldots ,7/2^{+}$ . For one set of solutions, there are four resonances forming naturally a spin-quartet of resonances with orbital angular momentum L = 2 and spin S = 3/2 coupling to $\ensuremath J=1/2,\ldots,7/2$ . Just below 1.9GeV we find a spin doublet of resonances with J P = 1/2- and 3/2- . Since a spin partner with J P = 5/2- is missing at this mass, the two resonances form a spin doublet which must have a symmetric orbital-angular-momentum wave function with L = 1 . For another set of solutions, the four positive-parity resonances are accompanied by mass-degenerate negative-parity partners --as suggested by the conjecture of chiral symmetry restoration. The possibility of a J P = 1/2+, 3/2+ spin doublet at 1900MeV belonging to a 20-plet is discussed. SIF, Springer-Verlag Berlin Heidelberg, 2011 Anisovich A. Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Bonn, Germany aut Klempt E. Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Bonn, Germany aut Nikonov V. Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Bonn, Germany aut Sarantsev A. Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Bonn, Germany aut Thoma U. Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Bonn, Germany aut The European Physical Journal A Springer Berlin Heidelberg 47/12(2011-12-01), 1-19 1434-6001 47:12<1 2011 47 10050 https://doi.org/10.1140/epja/i2011-11153-9 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1140/epja/i2011-11153-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Anisovich A. Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Bonn, Germany aut NATIONALLICENCE 700 1- Klempt E. Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Bonn, Germany aut NATIONALLICENCE 700 1- Nikonov V. Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Bonn, Germany aut NATIONALLICENCE 700 1- Sarantsev A. Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Bonn, Germany aut NATIONALLICENCE 700 1- Thoma U. Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Bonn, Germany aut NATIONALLICENCE 773 0- The European Physical Journal A Springer Berlin Heidelberg 47/12(2011-12-01), 1-19 1434-6001 47:12<1 2011 47 10050 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer