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Title: 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 $$η^\prime p\to η^\prime p$$ scattering amplitude in the threshold region were fit to yield the $$η^\prime p$$ scattering length and the interaction range. This new analysis found $$|a_{η^\prime p}|= (0.403\pm 0.015\pm 0.060)$$ fm and a phase $$φ=(87\pm2)^\circ$$, 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.
Authors:
 [1] ;  [2] ;  [3] ; ORCiD logo [4] ;  [1] ;  [3] ;  [1] ;  [5]
  1. Univ. of Bonn (Germany). Helmholtz Inst. for Radiation and Nuclear Physics; National Research Centre "Kurchatov Inst.", Gatchina (Russian Federation)
  2. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
  3. Arizona State Univ., Tempe, AZ (United States)
  4. Univ. of Bonn (Germany). Helmholtz Inst. for Radiation and Nuclear Physics; Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
  5. Univ. of Bonn (Germany). Helmholtz Inst. for Radiation and Nuclear Physics
Publication Date:
Report Number(s):
JLAB-PHY-18-2684; DOE/OR/23177-4416; arXiv:1803.06814
Journal ID: ISSN 0370-2693; PII: S0370269318304908
Grant/Contract Number:
AC05-06OR23177; PHY-1306737; SFB/TR110; 16-12-10267
Type:
Published Article
Journal Name:
Physics Letters. Section B
Additional Journal Information:
Journal Volume: 785; Journal ID: ISSN 0370-2693
Publisher:
Elsevier
Research Org:
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); Arizona State Univ., Tempe, AZ (United States); Univ. of Bonn (Germany); National Research Centre "Kurchatov Inst.", Gatchina (Russian Federation)
Sponsoring Org:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26); National Science Foundation (NSF); German Research Foundation (DFG); Russian Science Foundation (RSF)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; baryon spectroscopy; meson photoproduction; polarization observables
OSTI Identifier:
1455071
Alternate Identifier(s):
OSTI ID: 1480824

Anisovich, A. V., Burkert, V., Dugger, M., Klempt, E., Nikonov, V. A., Ritchie, B. G., Sarantsev, A. V., and Thoma, U.. Proton-η' interactions at threshold. United States: N. p., Web. doi:10.1016/j.physletb.2018.06.034.
Anisovich, A. V., Burkert, V., Dugger, M., Klempt, E., Nikonov, V. A., Ritchie, B. G., Sarantsev, A. V., & Thoma, U.. Proton-η' interactions at threshold. United States. doi:10.1016/j.physletb.2018.06.034.
Anisovich, A. V., Burkert, V., Dugger, M., Klempt, E., Nikonov, V. A., Ritchie, B. G., Sarantsev, A. V., and Thoma, U.. 2018. "Proton-η' interactions at threshold". United States. doi:10.1016/j.physletb.2018.06.034.
@article{osti_1455071,
title = {Proton-η' interactions at threshold},
author = {Anisovich, A. V. and Burkert, V. and Dugger, M. and Klempt, E. and Nikonov, V. A. and Ritchie, B. G. and Sarantsev, A. V. and Thoma, U.},
abstractNote = {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 $η^\prime p\to η^\prime p$ scattering amplitude in the threshold region were fit to yield the $η^\prime p$ scattering length and the interaction range. This new analysis found $|a_{η^\prime p}|= (0.403\pm 0.015\pm 0.060)$ fm and a phase $φ=(87\pm2)^\circ$, 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.},
doi = {10.1016/j.physletb.2018.06.034},
journal = {Physics Letters. Section B},
number = ,
volume = 785,
place = {United States},
year = {2018},
month = {6}
}