Proton-η′ interactions at threshold

A. V. Anisovich; V. Burkert; Michael Dugger; E. Klempt; V. A. Nikonov; Barry Ritchie; A. V. Sarantsev; U. Thoma

doi:10.1016/j.physletb.2018.06.034

Proton-η^′ interactions at threshold

A. V. Anisovich, V. Burkert, Michael Dugger, E. Klempt, V. A. Nikonov, Barry Ritchie, A. V. Sarantsev, U. Thoma

Research output: Contribution to journal › Article

6 Scopus citations

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.

Original language	English (US)
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
DOIs	https://doi.org/10.1016/j.physletb.2018.06.034
State	Accepted/In press - Jan 1 2018

Keywords

Baryon spectroscopy
Meson photoproduction
Polarization observables

ASJC Scopus subject areas

Nuclear and High Energy Physics

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Anisovich, A. V., Burkert, V., Dugger, M., Klempt, E., Nikonov, V. A., Ritchie, B., Sarantsev, A. V., & Thoma, U. (Accepted/In press). Proton-η^′ interactions at threshold. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics. https://doi.org/10.1016/j.physletb.2018.06.034

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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",

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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

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