N⁎ → Nη′ decays from photoproduction of η′-mesons off protons.
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| Title: | N⁎ → Nη′ decays from photoproduction of η′-mesons off protons. |
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| Authors: | Anisovich, A.V.1,2, Burkert, V.3, Collins, P.M.4, Dugger, M.4, Klempt, E.1,3 klempt@hiskp.uni-bonn.de, Nikonov, V.A.1,2, Ritchie, B.G.4, Sarantsev, A.V.1,2, Thoma, U.1 |
| Source: | Physics Letters B. Sep2017, Vol. 772, p247-252. 6p. |
| Subjects: | Meson decay, Proton decay, Physical measurements, Symmetry (Physics), Nuclear reactions |
| Abstract: | A study of the partial-wave content of the γ p → η ′ p reaction in the fourth resonance region is presented, which has been prompted by new measurements of polarization observables for that process. Using the Bonn–Gatchina partial-wave formalism, the incorporation of new data indicates that the N ( 1895 ) 1 / 2 − , N ( 1900 ) 3 / 2 + , N ( 2100 ) 1 / 2 + , and N ( 2120 ) 3 / 2 − are the most significant contributors to the photoproduction process. New results for the branching ratios of the decays of these more prominent resonances to N η ′ final states are provided; such branches have not been indicated in the most recent edition of the Review of Particle Properties. Based on the analysis performed here, predictions for the helicity asymmetry E for the γ p → η ′ p reaction are presented. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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