Proton-$\eta^\prime$ interactions at threshold - INSPIRE

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Proton- $\eta^\prime$ interactions at threshold

A.V. Anisovich
(
- Bonn U. and
- Bonn U., HISKP and
- St. Petersburg, INP
)
,
V. Burkert
(
- Jefferson Lab
)
,
M. Dugger
(
- Arizona State U.
)
,
E. Klempt
(
- Bonn U. and
- Bonn U., HISKP and
- Jefferson Lab
)
,
V.A. Nikonov
(
- Bonn U. and
- Bonn U., HISKP and
- St. Petersburg, INP
)

Mar 19, 2018

5 pages

Published in:

Phys.Lett.B 785 (2018) 626-630

Published: Oct 10, 2018

e-Print:

1803.06814 [nucl-ex]

DOI:

10.1016/j.physletb.2018.06.034

Report number:

JLAB-PHY-18-2684

View in:

ADS Abstract Service

reference search31 citations

Citations per year

Abstract: (Elsevier)

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.

Note:

5 pages, 5 figures

baryon spectroscopy
meson photoproduction
polarization observables
Baryon spectroscopy
Meson photoproduction
Polarization observables
beam: asymmetry
scattering length
eta(958)
partial wave analysis

References(34)

Figures(5)

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