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The European Physical Journal A

, Volume 44, Issue 2, pp 169–173 | Cite as

Primakoff effect in \( \eta\) -photoproduction off protons

  • A. Sibirtsev
  • J. Haidenbauer
  • S. Krewald
  • U. -G. MeißnerEmail author
Open Access
Letter

Abstract.

We analyse data on forward \( \eta\) -meson photoproduction off a proton target and extract the \( \eta\) \( \rightarrow\) \( \gamma\) \( \gamma\) decay width utilizing the Primakoff effect. The hadronic amplitude that enters into our analysis is strongly constrained because it is fixed from a global fit to available \( \gamma\) p \( \rightarrow\) p \( \eta\) data for differential cross-sections and polarizations. We compare our results with present information on the two-photon \( \eta\) -decay from the literature. We provide predictions for future PrimEx experiments at Jefferson Laboratory in order to motivate further studies.

Keywords

Form Factor Photon Energy Decay Width Proton Target Shade Band 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

References

  1. 1.
    S.L. Adler, Phys. Rev. 177, 2426 (1969)CrossRefADSGoogle Scholar
  2. 2.
    J.S. Bell, R. Jackiw, Nuovo Cimento A 60, 47 (1969)CrossRefADSGoogle Scholar
  3. 3.
    W.A. Bardeen, Phys. Rev. 184, 1848 (1969)CrossRefADSGoogle Scholar
  4. 4.
    J. Wess, B. Zumino, Phys. Lett. B 37, 95 (1971)CrossRefMathSciNetADSGoogle Scholar
  5. 5.
    E. Witten, Nucl. Phys. B 223, 422 (1983)CrossRefMathSciNetADSGoogle Scholar
  6. 6.
    J. Bijnens, Int. J. Mod. Phys. A 8, 3045 (1993)CrossRefADSGoogle Scholar
  7. 7.
    J.L. Goity, A.M. Bernstein, B.R. Holstein, Phys. Rev. D 66, 076014 (2002)CrossRefADSGoogle Scholar
  8. 8.
    K. Kampf, B. Moussallam, Phys. Rev. D 79, 076005 (2009)CrossRefADSGoogle Scholar
  9. 9.
    J. Gasser, H. Leutwyler, Nucl. Phys. B 250, 465 (1985)CrossRefADSGoogle Scholar
  10. 10.
    H. Leutwyler, Nucl. Phys. Proc. Suppl. 64, 223 (1998)CrossRefADSGoogle Scholar
  11. 11.
    T. Feldmann, Int. J. Mod. Phys. A 15, 159 (2000)ADSGoogle Scholar
  12. 12.
    Particle Data Group (C. Amsler et al.), Phys. Lett. B 667, 1 (2008)CrossRefADSGoogle Scholar
  13. 13.
    S.E. Baru et al., Z. Phys. C 48, 581 (1990)CrossRefADSGoogle Scholar
  14. 14.
    N.A. Roe et al., Phys. Rev. D 41, 17 (1990)CrossRefADSGoogle Scholar
  15. 15.
    D.A. Williams et al., Phys. Rev. D 38, 1365 (1988)CrossRefADSGoogle Scholar
  16. 16.
    W. Bartel et al., Phys. Lett. B 160, 421 (1985)CrossRefADSGoogle Scholar
  17. 17.
    H. Aihara et al., Phys. Rev. D 33, 844 (1986)CrossRefADSGoogle Scholar
  18. 18.
    A.J. Weinstein et al., Phys. Rev. D 28, 2896 (1983)CrossRefADSGoogle Scholar
  19. 19.
    A. Browman et al., Phys. Rev. Lett. 32, 1067 (1974)CrossRefADSGoogle Scholar
  20. 20.
    C. Bemporad et al., Phys. Lett. B 25, 380 (1967)CrossRefADSGoogle Scholar
  21. 21.
    Particle Data Group (L. Montanet et al.), Phys. Rev. D 50, 1451 (1994)CrossRefGoogle Scholar
  22. 22.
    T.E. Rodrigues et al., Phys. Rev. Lett. 101, 012301 (2008)CrossRefADSGoogle Scholar
  23. 23.
    W. Braunschweig et al., Phys. Lett. B 33, 236 (1970)CrossRefADSGoogle Scholar
  24. 24.
    J.M. Laget, Phys. Rev. C 72, 022202(R) (2005)ADSGoogle Scholar
  25. 25.
    PrimEx Collaboration (A. Gasparian), www.jlab.org/primex/primex_notes/PR-09-015.pdf
  26. 26.
    J. Dewire, B. Gittelman, R. Loe, E.C. Loh, D.J. Ritchie, R.A. Lewis, Phys. Lett. B 37, 326 (1971)CrossRefADSGoogle Scholar
  27. 27.
    A. Sibirtsev, J. Haidenbauer, S. Krewald, U.-G. Meißner, A.W. Thomas, Eur. Phys. J. A 41, 71 (2009)CrossRefADSGoogle Scholar
  28. 28.
    A. Sibirtsev, J. Haidenbauer, S. Krewald, U.-G. Meißner, in preparationGoogle Scholar
  29. 29.
    V. Crede et al., Phys. Rev. Lett. 94, 012004 (2005)CrossRefADSGoogle Scholar
  30. 30.
    P.J. Bussey et al., Phys. Lett. B 61, 479 (1976)CrossRefADSGoogle Scholar
  31. 31.
    R.L. Anderson et al., Phys. Rev. D 1, 27 (1970)CrossRefADSGoogle Scholar
  32. 32.
    M. Williams et al., Phys. Rev. C 80, 045213 (2009)CrossRefADSGoogle Scholar
  33. 33.
    I. Jaegle et al., Phys. Rev. Lett. 100, 252002 (2008)CrossRefADSGoogle Scholar
  34. 34.
    V. Crede et al., Phys. Rev. C 80, 055202 (2009)CrossRefADSGoogle Scholar
  35. 35.
    P.J. Bussey et al., Nucl. Phys. B 185, 269 (1981)CrossRefADSGoogle Scholar
  36. 36.
    P.D.B. Collins, A. Fitton, Nucl. Phys. B 68, 125 (1974)CrossRefADSGoogle Scholar
  37. 37.
    E.N. Argyres et al., Nucl. Phys. B 45, 267 (1972)CrossRefADSGoogle Scholar
  38. 38.
    F. Huang, A. Sibirtsev, S. Krewald, C. Hanhart, J. Haidenbauer, U-G. Meißner, Eur. Phys. J. A 40, 77 (2009)CrossRefADSGoogle Scholar
  39. 39.
    J.R. Cudell et al., Phys. Rev. D 65, 074024 (2002)CrossRefADSGoogle Scholar
  40. 40.
    H. Primakoff, Phys. Rev. 81, 899 (1951)CrossRefADSGoogle Scholar
  41. 41.
    A. Donnachie, P.V. Landshoff, Nucl. Phys. B 231, 189 (1984)CrossRefADSGoogle Scholar
  42. 42.
    M.A. Belushkin, H.-W. Hammer, U.-G. Meißner, Phys. Rev. C 75, 035202 (2007)CrossRefADSGoogle Scholar
  43. 43.
    J. Gronberg et al., Phys. Rev. D 57, 33 (1998)CrossRefADSGoogle Scholar
  44. 44.
    S.J. Brodsky, G.P. Lepage, Phys. Rev. D 24, 1808 (1981)CrossRefADSGoogle Scholar
  45. 45.
    B.M.K. Nefkens, J.W. Price, Phys. Scr. T 99, 114 (2002)CrossRefADSGoogle Scholar

Copyright information

© The Author(s) 2010

Open Access This article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.

Authors and Affiliations

  • A. Sibirtsev
    • 1
    • 2
    • 3
  • J. Haidenbauer
    • 3
    • 4
  • S. Krewald
    • 3
    • 4
  • U. -G. Meißner
    • 1
    • 3
    • 4
    Email author
  1. 1.Helmholtz-Institut für Strahlen- und Kernphysik (Theorie) und Bethe Center for Theoretical PhysicsUniversität BonnBonnGermany
  2. 2.Excited Baryon Analysis Center (EBAC)Thomas Jefferson National Accelerator FacilityNewport NewsUSA
  3. 3.Institut für Kernphysik and Jülich Center for Hadron PhysicsForschungszentrum JülichJülichGermany
  4. 4.Institute for Advanced SimulationForschungszentrum JülichJülichGermany

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