Proton-η′ interactions at threshold
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 ran...
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Elsevier
2018-10-01
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| Series: | Physics Letters B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269318304908 |
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doaj-fe2e01fbf19c4a5e9dd2ed4ba4bd49792020-11-24T22:03:18ZengElsevierPhysics Letters B0370-26932018-10-01785626630Proton-η′ interactions at thresholdA.V. Anisovich0V. Burkert1M. Dugger2E. Klempt3V.A. Nikonov4B.G. Ritchie5A.V. Sarantsev6U. Thoma7Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Germany; NRC “Kurchatov Institute”, PNPI, Gatchina 188300, RussiaThomas Jefferson National Accelerator Facility, Newport News, VA 23606, United States of AmericaArizona State University, Tempe, AZ 85287-1504, United States of AmericaHelmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Germany; Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, United States of America; Corresponding author.Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Germany; NRC “Kurchatov Institute”, PNPI, Gatchina 188300, RussiaArizona State University, Tempe, AZ 85287-1504, United States of AmericaHelmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Germany; NRC “Kurchatov Institute”, PNPI, Gatchina 188300, RussiaHelmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, GermanyRecent 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 observableshttp://www.sciencedirect.com/science/article/pii/S0370269318304908 |
| collection |
DOAJ |
| language |
English |
| format |
Article |
| sources |
DOAJ |
| author |
A.V. Anisovich V. Burkert M. Dugger E. Klempt V.A. Nikonov B.G. Ritchie A.V. Sarantsev U. Thoma |
| spellingShingle |
A.V. Anisovich V. Burkert M. Dugger E. Klempt V.A. Nikonov B.G. Ritchie A.V. Sarantsev U. Thoma Proton-η′ interactions at threshold Physics Letters B |
| author_facet |
A.V. Anisovich V. Burkert M. Dugger E. Klempt V.A. Nikonov B.G. Ritchie A.V. Sarantsev U. Thoma |
| author_sort |
A.V. Anisovich |
| title |
Proton-η′ interactions at threshold |
| title_short |
Proton-η′ interactions at threshold |
| title_full |
Proton-η′ interactions at threshold |
| title_fullStr |
Proton-η′ interactions at threshold |
| title_full_unstemmed |
Proton-η′ interactions at threshold |
| title_sort |
proton-η′ interactions at threshold |
| publisher |
Elsevier |
| series |
Physics Letters B |
| issn |
0370-2693 |
| publishDate |
2018-10-01 |
| description |
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 |
| url |
http://www.sciencedirect.com/science/article/pii/S0370269318304908 |
| work_keys_str_mv |
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