Proton-η′ interactions at threshold.
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| Title: | Proton-η′ interactions at threshold. |
|---|---|
| Authors: | Anisovich, A.V.1,2, Burkert, V.3, 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. Oct2018, Vol. 785, p626-630. 5p. |
| Subjects: | Scattering (Physics), Wave analysis, Fluid dynamics, Wave mechanics, Wave analyzers |
| Abstract: | Abstract Recent data on photoproduction of η ′ mesons off protons have been included in the data base for the Bonn–Gatchina partial wave analysis. The real and imaginary parts of the S -wave η ′ p → η ′ p scattering amplitude in the threshold region were fit to yield the η ′ p scattering length and the interaction range. This new analysis found | a η ′ p | = (0.403 ± 0.015 ± 0.060) fm and a phase ϕ = (87 ± 2) ∘ , while the range parameter is not well-constrained. The striking behavior of the GRAAL data on the beam asymmetry in the threshold region suggests that a narrow proton- η ′ resonance might exist. However, the scattering length was found to be relatively insensitive to the possible existence of this narrow resonance. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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