@article{7d6a28d95f6f4741a65ff494d768fb48,
title = "Proton-η′ interactions at threshold",
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 |aη′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.",
keywords = "Baryon spectroscopy, Meson photoproduction, Polarization observables",
author = "Anisovich, {A. V.} and V. Burkert and Michael Dugger and E. Klempt and Nikonov, {V. A.} and Barry Ritchie and Sarantsev, {A. V.} and U. Thoma",
note = "Funding Information: We would like to thank V. Metag for illuminating discussions on ?? interactions in nuclei. This work was supported by the Deutsche Forschungsgemeinschaft (SFB/TR110). The work of AVA, AVS and VAN is supported by the RSF grant 16-12-10267. Work at Arizona State University was supported by the U. S. National Science Foundation under award PHY-1306737. This material is in part based upon work supported by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics under contract DE-AC05-06OR23177. Funding Information: We would like to thank V. Metag for illuminating discussions on interactions in nuclei. This work was supported by the Deutsche Forschungsgemeinschaft ( SFB/TR110 ). The work of AVA, AVS and VAN is supported by the RSF grant 16-12-10267 . Work at Arizona State University was supported by the U. S. National Science Foundation under award PHY-1306737 . This material is in part based upon work supported by the U.S. Department of Energy , Office of Science, Office of Nuclear Physics under contract DE-AC05-06OR23177 . Publisher Copyright: {\textcopyright} 2018 The Authors Copyright: Copyright 2018 Elsevier B.V., All rights reserved.",
year = "2018",
month = oct,
day = "10",
doi = "10.1016/j.physletb.2018.06.034",
language = "English (US)",
volume = "785",
pages = "626--630",
journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",
issn = "0370-2693",
publisher = "Elsevier",
}