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.
| Original language | English (US) |
|---|---|
| Journal | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics |
| DOIs | |
| State | Accepted/In press - Jan 1 2018 |
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Keywords
- Baryon spectroscopy
- Meson photoproduction
- Polarization observables
ASJC Scopus subject areas
- Nuclear and High Energy Physics
Cite this
Proton-η′ interactions at threshold. / Anisovich, A. V.; Burkert, V.; Dugger, Michael; Klempt, E.; Nikonov, V. A.; Ritchie, Barry; Sarantsev, A. V.; Thoma, U.
In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 01.01.2018.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Proton-η′ interactions at threshold
AU - Anisovich, A. V.
AU - Burkert, V.
AU - Dugger, Michael
AU - Klempt, E.
AU - Nikonov, V. A.
AU - Ritchie, Barry
AU - Sarantsev, A. V.
AU - Thoma, U.
PY - 2018/1/1
Y1 - 2018/1/1
N2 - 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.
AB - 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.
KW - Baryon spectroscopy
KW - Meson photoproduction
KW - Polarization observables
UR - http://www.scopus.com/inward/record.url?scp=85051411950&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85051411950&partnerID=8YFLogxK
U2 - 10.1016/j.physletb.2018.06.034
DO - 10.1016/j.physletb.2018.06.034
M3 - Article
AN - SCOPUS:85051411950
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
SN - 0370-2693
ER -