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Title: Photon beam asymmetry Σ for η and η' photoproduction from the proton

Measurements of the linearly-polarized photon beam asymmetry $$\Sigma$$ for photoproduction from the proton of $$\eta$$ and $$\eta^\prime$$ mesons are reported. A linearly-polarized tagged photon beam produced by coherent bremsstrahlung was incident on a cryogenic hydrogen target within the CEBAF Large Acceptance Spectrometer. Results are presented for the $$\gamma p \to \eta p$$ reaction for incident photon energies from 1.070 to 1.876 GeV, and from 1.516 to 1.836 GeV for the $$\gamma p \to \eta^\prime p$$ reaction. For $$\gamma p \to \eta p$$, the data reported here considerably extend the range of measurements to higher energies, and are consistent with the few previously published measurements for this observable near threshold. For $$\gamma p \to \eta^\prime p$$, the results obtained are consistent with the few previously published measurements for this observable near threshold, but also greatly expand the incident photon energy coverage for that reaction. In conclusion, initial analysis of the data reported here with the Bonn-Gatchina model strengthens the evidence for four nucleon resonances -- the $N(1895)1/2^-$, $N(1900)3/2^+$, $N(2100)1/2^+$ and $N(2120)3/2^-$ resonances -- which presently lack the "four-star" status in the current Particle Data Group compilation, providing examples of how these new measurements help refine models of the photoproduction process.
Authors:
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  1. Arizona State Univ., Tempe, AZ (United States); The Catholic Univ. of America, Washington, DC (United States)
  2. Arizona State Univ., Tempe, AZ (United States)
  3. Univ. of Bonn (Germany). Helmholtz-Inst. fur Strahlen-und Kernphysik
  4. George Washington Univ., Washington, DC (United States); Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
  5. Univ. of Bonn (Germany). Helmholtz-Inst. fur Strahlen-und Kernphysik; Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
  6. Univ. of Bonn (Germany). Helmholtz-Inst. fur Strahlen-und Kernphysik; National Research Center (NRC) Kurchatov Inst., Gatchina (Russia). Petersburg Nuclear Physics Inst. (PNPI)
  7. Univ. of Bonn (Germany). Bethe Center for Theoretical Physics; Univ. of Bonn (Germany). Helmholtz-Inst. fur Strahlen-und Kernphysik
  8. George Washington Univ., Washington, DC (United States)
  9. Mississippi State Univ., Mississippi State, MS (United States)
  10. Florida State Univ., Tallahassee, FL (United States)
  11. Old Dominion Univ., Norfolk, VA (United States)
  12. Istituto Nazionale di Fisica Nucleare (INFN), Frascati (Italy). Lab. Nazionali di Frascati
  13. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
  14. Univ. Paris-Saclay, Gif-sur-Yvette (France)
  15. Istituto Nazionale di Fisica Nucleare (INFN), Ferrara (Italy)
  16. Edinburgh Univ. (United Kingdom)
  17. Istituto Nazionale di Fisica Nucleare (INFN), Genova (Italy)
  18. Inst. of Theoretical and Experimental Physics, Moscow (Russia)
  19. Fairfield Univ., CT (United States); Carnegie Mellon Univ., Pittsburgh, PA (United States)
  20. Univ. Tecnica Federico Santa Maria, Valparaiso (Chile); Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
  21. Univ. of Connecticut, Storrs, CT (United States)
  22. Ohio Univ., Athens, OH (United States)
  23. Univ. of Glasgow, Scotland (United Kingdom)
  24. Idaho State Univ., Pocatello, ID (United States)
  25. National Inst. of Nuclear Physics (INFN), Rome (Italy); Univ. of Rome Tor Vergata (Italy)
  26. Yerevan Physics Inst., Yerevan (Armenia)
  27. Univ. of South Carolina, Columbia, SC (United States)
  28. Centre National de la Recherche Scientifique (CNRS), Orsay (France). Inst. National de Physique Nucleaire et de Physique des Particules (IN2P3); Univ. Paris-Sud, Orsay (France)
  29. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); Univ. of New Hampshire, Durham, NH (United States)
  30. Univ. Tecnica Federico Santa Maria, Valparaiso (Chile)
  31. Univ. of South Carolina, Columbia, SC (United States); Lomonosov Moscow State Univ., Moscow (Russia). Skobeltsyn Inst. of Nuclear Physics
  32. Istituto Nazionale di Fisica Nucleare (INFN), Torino (Italy)
  33. Univ. of Richmond, Richmond, VA (United States)
  34. James Madison Univ., Harrisonburg, VA (United States)
  35. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); Univ. Paris-Saclay, Gif-sur-Yvette (France)
  36. Lomonosov Moscow State Univ., Moscow (Russia). Skobeltsyn Inst. of Nuclear Physics
  37. College of William and Mary, Williamsburg, VA (United States)
  38. Florida International Univ., Miami, FL (United States)
  39. Argonne National Lab. (ANL), Argonne, IL (United States)
  40. Univ. Tecnica Federico Santa Maria, Valparaiso (Chile); Yerevan Physics Inst., Yerevan (Armenia)
  41. Christopher Newport Univ., Newport News (United States); Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
  42. Univ. of New Hampshire, Durham, NH (United States)
  43. Univ. of Edinburgh, Scotland (United Kingdom)
  44. Univ. of South Carolina, Columbia, SC (United States); George Washington Univ., Washington, DC (United States)
  45. Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States)
  46. Temple Univ., Philadelphia, PA (United States)
  47. Univ. of Virginia, Charlottesville, VA (United States)
  48. Norfolk State Univ., Norfolk, VA (United States)
  49. Kyungpook National Univ., Daegu (Korea, Republic of)
  50. The Catholic Univ. of America, Washington, DC (United States)
  51. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); Rensselaer Polytechnic Inst., Troy, NY (United States)
  52. National Inst. of Nuclear Physics (INFN), Tor Vergata, Rome (Italy)
  53. Carnegie Mellon Univ., Pittsburgh, PA (United States)
  54. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); Lomonosov Moscow State Univ., Moscow (Russia). Skobeltsyn Inst. of Nuclear Physics
  55. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); George Washington Univ., Washington, DC (United States)
  56. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); Kyungpook National Univ., Daegu (Korea, Republic of)
  57. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); Arizona State Univ., Tempe, AZ (United States)
  58. California State Univ. (CalState), Carson, CA (United States)
  59. Old Dominion Univ., Norfolk, VA (United States); Univ. of Virginia, Charlottesville, VA (United States); Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
  60. Florida International Univ., Miami, FL (United States); Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
  61. Univ. of South Carolina, Columbia, SC (United States); Lomonosov Moscow State Univ., Moscow (Russia). Skobeltsyn Inst. of Nuclear Physics
  62. Univ. di Genova (Italy)
  63. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); Univ. of Connecticut, Storrs, CT (United States)
  64. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); Old Dominion Univ., Norfolk, VA (United States)
Publication Date:
Report Number(s):
JLAB-PHY-17-2429; DOE/OR/-23177-4084
Journal ID: ISSN 0370-2693; PII: S0370269317304082
Grant/Contract Number:
AC05-06OR23177; AC05-84ER40150
Type:
Published Article
Journal Name:
Physics Letters. Section B
Additional Journal Information:
Journal Volume: 771; Journal Issue: C; Journal ID: ISSN 0370-2693
Publisher:
Elsevier
Research Org:
Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26); National Science Foundation (NSF); Chilean Comisión Nacional de Investigación Científica y Tecnológica (CONICYT); German Research Foundation (DFG)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Meson photoproduction; Eta photoproduction; Eta-prime photoproduction; Polarization observable; Photon beam asymmetry
OSTI Identifier:
1357933
Alternate Identifier(s):
OSTI ID: 1365668