Advertisement

μpGEp/GMp and qF2p/F1p in a relativistic quark model

  • W. R. B. de Araújo
  • T. FredericoEmail author
  • M. Beyer
  • H. J. Weber
Hadron Physics

Abstract.

The possible zero of the proton electromagnetic form factor ratio G Ep/G Mp is studied within a light-front quark model. The position of the zero is determined by the presence of a hard constituent quark component in the nucleon wave function. The description of the data for the ratios μp G Ep/G Mp and qF 2p/F 1p is improved when the hard-scale component of the nucleon wave function is considered.

PACS.

12.39.-x Phenomenological quark models 13.40.-f Electromagnetic processes and properties 13.40.Gp Electromagnetic form factors 14.20.Dh Protons and neutrons 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    Jefferson Lab Hall A Collaboration (M.K. Jones), Phys. Rev. Lett. 84, 1398 (2000).CrossRefADSGoogle Scholar
  2. 2.
    O. Gayou, Phys. Rev. Lett. 88, 092301 (2002).CrossRefADSGoogle Scholar
  3. 3.
    P.A.M. Guichon, M. Vanderhaeghen, Phys. Rev. Lett. 91, 142303 (2003).CrossRefADSGoogle Scholar
  4. 4.
    P.G. Blunden, W. Melnitchouk, J.A. Tjon, Phys. Rev. Lett. 91, 142304 (2003).CrossRefADSGoogle Scholar
  5. 5.
    C.E. Hyde-Wright, K. de Jager, Annu. Rev. Nucl. Part. Sci. 54, 217 (2004).CrossRefADSGoogle Scholar
  6. 6.
    Y.-C. Chen, A. Afanasev, S.J. Brodsky, C.E. Carlson, M. Vanderhaeghen, Phys. Rev. Lett. 93, 122301 (2004).CrossRefADSGoogle Scholar
  7. 7.
    S. Kondratyuk, P.G. Blunden, W. Melnitchouk, J.A. Tjon, Phys. Rev. Lett. 95, 172503 (2005).CrossRefADSGoogle Scholar
  8. 8.
    P.G. Blunden, W. Melnitchouk, J.A. Tjon, Eur. Phys. J. A 24, 59 (2005).CrossRefGoogle Scholar
  9. 9.
    E.J. Brash, A. Koslov, Sh. Li, G.M. Huber, Phys. Rev. C 65, 051001(R) (2002).CrossRefADSGoogle Scholar
  10. 10.
    E.L. Lomon, Phys. Rev. C 66, 045501 (2002).CrossRefADSGoogle Scholar
  11. 11.
    J.J. Kelly, Phys. Rev. C 66, 065203 (2002).CrossRefADSGoogle Scholar
  12. 12.
    J. Friedrich, Th. Walcher, Eur. Phys. J. A 17, 607 (2003).CrossRefADSGoogle Scholar
  13. 13.
    A.H. Mueller, Phys. Rep. 73, 237 (1981).CrossRefADSGoogle Scholar
  14. 14.
    G.P. Lepage, S.J. Brodsky, Phys. Rev. D 22, 2157 (1980).CrossRefADSGoogle Scholar
  15. 15.
    P.L. Chung, F. Coester, Phys. Rev. D 44, 229 (1991).CrossRefADSGoogle Scholar
  16. 16.
    F. Cardarelli, E. Pace, G. Salmè, S. Simula, Phys. Lett. B 357, 267 (1995)CrossRefADSGoogle Scholar
  17. 17.
    M.R. Frank, B.K. Jennings, G.A. Miller, Phys. Rev. C 54, 920 (1996).CrossRefADSGoogle Scholar
  18. 18.
    F. Cardarelli, S. Simula, Phys. Rev. C 62, 065201 (2000)CrossRefADSGoogle Scholar
  19. 19.
    R.F. Wagenbrunn, S. Boffi, W. Klink, W. Plessas, M. Radici, Phys. Lett. B 511, 33 (2001).CrossRefADSGoogle Scholar
  20. 20.
    G.A. Miller, M.R. Frank, Phys. Rev. C 65, 065205 (2002).CrossRefADSGoogle Scholar
  21. 21.
    G.A. Miller, Phys. Rev. C 66, 032201(R) (2002).CrossRefADSGoogle Scholar
  22. 22.
    H. Gao, Int. J. Mod. Phys. E 12, 1 (2003) and references therein.zbMATHCrossRefADSGoogle Scholar
  23. 23.
    G.A. Miller, Phys. Rev. C 68, 022201(R) (2003).CrossRefADSGoogle Scholar
  24. 24.
    F. Schlumpf, Phys. Rev. D 47, 4114 (1993).CrossRefADSGoogle Scholar
  25. 25.
    W.R.B. de Araújo, E.F. Suisso, T. Frederico, M. Beyer, H.J. Weber, Phys. Lett. B 478, 86 (2000)CrossRefGoogle Scholar
  26. 26.
    B. Bakamjian, L.H. Thomas, Phys. Rev. 92, 1300 (1953).zbMATHMathSciNetCrossRefADSGoogle Scholar
  27. 27.
    H.J. Melosh, Phys. Rev. D 9, 1095 (1974).CrossRefADSGoogle Scholar
  28. 28.
    W.R.B. de Araújo, T. Frederico, M. Beyer, H.J. Weber, J. Phys. G 25, 1589 (1999).CrossRefGoogle Scholar
  29. 29.
    P. Kroll, M. Schurmann, W. Schweiger, Z. Phys. A 338, 339 (1991).CrossRefGoogle Scholar
  30. 30.
    J. Bolz, P. Kroll, Z. Phys. A 356, 327 (1996).CrossRefGoogle Scholar
  31. 31.
    H.-C. Pauli, Eur. Phys. J. C 7, 289 (1998)MathSciNetCrossRefADSGoogle Scholar
  32. 32.
    T. Frederico, H.C. Pauli, Phys. Rev. D 64, 054007 (2001).CrossRefADSGoogle Scholar
  33. 33.
    T. Frederico, H.C. Pauli, S.G. Zhou, Phys. Rev. D 66, 054007Google Scholar
  34. 34.
    S.J. Brodsky, H.-C. Pauli, S.S. Pinsky, Phys. Rep. 301, 299 (1998) and references therein.MathSciNetCrossRefADSGoogle Scholar
  35. 35.
    F. Iachello, N.C. Mukhpadhyay, L. Zang, Phys. Rev. D 44, 88 (1991).CrossRefGoogle Scholar
  36. 36.
    A.V. Anisovich, V.V. Anisovich, A.V. Sarantesev, Phys. Rev. D 62, 051502(R) (2000).CrossRefADSGoogle Scholar
  37. 37.
    S. Godfrey, N. Isgur, Phys. Rev. D 32, 189 (1985).MathSciNetCrossRefADSGoogle Scholar
  38. 38.
    F. Cardarelli, I.L. Grach, I.M. Narodetskii, E. Pace, G. Salmè, S. Simula, Phys. Lett. B 332, 1 (1994)CrossRefADSGoogle Scholar
  39. 39.
    H.-M. Choi, C.-R. Ji, Phys. Rev. D 59, 074015 (1999)CrossRefADSGoogle Scholar
  40. 40.
    E.M. Aitala, Phys. Rev. Lett. 86, 4768 (2001).CrossRefADSGoogle Scholar
  41. 41.
    P. Maris, P.C. Tandy, Phys. Rev. C 61, 045202 (2000)CrossRefADSGoogle Scholar
  42. 42.
    F. Cardarelli, E. Pace, G. Salme, S. Simula, Phys. Lett. B 357, 267 (1995).CrossRefADSGoogle Scholar
  43. 43.
    R. Petronzio, S. Simula, G. Ricco, Phys. Rev. D 67, 094004 (2003)CrossRefADSGoogle Scholar
  44. 44.
    S.J. Brodsky, F. Schlumpf, Phys. Lett. B 329, 111 (1994)CrossRefADSGoogle Scholar
  45. 45.
    J. Carbonell, B. Desplanques, V. Karmanov, J.-F. Mathiot, Phys. Rep. 300, 215 (1998) and references therein.MathSciNetCrossRefADSGoogle Scholar
  46. 46.
    J.H.O. Sales, T. Frederico, B.V. Carlson, P.U. Sauer, Phys. Rev. C 61, 044003 (2000)CrossRefADSGoogle Scholar
  47. 47.
    T. Frederico, G.A. Miller, Phys. Rev. D 45, 4207 (1992).CrossRefADSGoogle Scholar
  48. 48.
    J.P.B.C. de Melo, H.W. Naus, T. Frederico, Phys. Rev. C 59, 2278 (1999).CrossRefADSGoogle Scholar
  49. 49.
    B.L.G. Bakker, H.-M. Choi, C.-R. Ji, Phys. Rev. D 63, 074014 (2001).CrossRefADSGoogle Scholar
  50. 50.
    S.J. Brodsky, J.R. Primack, Ann. Phys. (N.Y.) 52, 315 (1969).CrossRefADSGoogle Scholar
  51. 51.
    J.J. Murphy II, Y.M. Shin, D.M. Skopik, Phys. Rev. C 9, 3125 (1974).Google Scholar
  52. 52.
    R. Rosenfelder, Phys. Lett. B 479, 381 (2000).CrossRefADSGoogle Scholar
  53. 53.
    S. Kopecky, Phys. Rev. Lett. 74, 2427 (1995).CrossRefADSGoogle Scholar
  54. 54.
    G. Holer, Nucl. Phys. B 144, 505 (1976).CrossRefADSGoogle Scholar
  55. 55.
    S. Rock, Phys. Rev. Lett. 49, 1139 (1982).CrossRefADSGoogle Scholar

Copyright information

© Società Italiana di Fisica and Springer-Verlag 2006

Authors and Affiliations

  • W. R. B. de Araújo
    • 1
  • T. Frederico
    • 1
    Email author
  • M. Beyer
    • 2
  • H. J. Weber
    • 3
  1. 1.Departamento de Fısica, Instituto Tecnológico de AeronáuticaCentro Técnico AeroespacialSão José dos CamposBrazil
  2. 2.Fachbereich PhysikUniversität RostockRostockGermany
  3. 3.Department of PhysicsUniversity of VirginiaCharlottesvilleUSA

Personalised recommendations