\(1/2^ + uudd\bar s\) pentaquark and instanton-induced forces

  • C. Semay
  • B. Silvestre-Brac


The mass of the 1/2 + \(uudd\bar s\) pentaquark is calculated within the framework of a semirelativistic effective Hamiltonian approach to QCD with instanton-induced forces, using a diquark picture. This approximation allows a correct treatment of the confinement, assumed here to be a Y-junction. With the [ud] diquark mass fitted on the \(\Lambda\)-baryon, the ground-state pentaquark is found around 2.2 GeV.


Elementary Particle Correct Treatment Hamiltonian Approach Diquark Mass Effective Hamiltonian Approach 
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  1. 1.
    See, for instance, T. Nakano et al. , Phys. Rev. Lett. 91, 012002 (2003).CrossRefGoogle Scholar
  2. 2.
    D. Diakonov, V. Petrov, M.V. Polyakov, Z. Phys. A 359, 305 (1997).CrossRefGoogle Scholar
  3. 3.
    R.L. Jaffe, F. Wilczek, Phys. Rev. Lett. 91, 232003 (2003).CrossRefGoogle Scholar
  4. 4.
    I.M. Narodetskii et al. , Phys. Lett. B 578, 318 (2004).CrossRefGoogle Scholar
  5. 5.
    I.M. Narodetskii et al. , Pentaquark masses in the Jaffe-Wilczek approximation, submitted to Yad. Fiz. (Phys. At. Nucl.).Google Scholar
  6. 6.
    S. Fleck, B. Silvestre-Brac, J.M. Richard, Phys. Rev. D 38, 1519 (1988).CrossRefGoogle Scholar
  7. 7.
    L.Ya. Glozman et al. , Phys. Rev. C 57, 3406 (1998).CrossRefGoogle Scholar
  8. 8.
    N.I. Kochelev, Yad. Fiz. 41, 456 (1985) (Sov. J. Nucl. Phys. 41, 291 (1985)).Google Scholar
  9. 9.
    B. Silvestre-Brac, C. Semay, I.M. Narodetskii, A.I. Veselov, Eur. Phys. J. C 32, 385 (2004).Google Scholar
  10. 10.
    I.M. Narodetskii, Yu.A. Simonov, M.A. Trusov, A.I. Veselov, Phys. Lett. B 578, 318 (2004).CrossRefGoogle Scholar
  11. 11.
    C. Semay, B. Silvestre-Brac, I.M. Narodetskii, Phys. Rev. D 69, 014003 (2004).CrossRefGoogle Scholar
  12. 12.
    D.B. Lichtenberg, W. Namgung, J.G. Wills, E. Predazzi, Z. Phys. C 19, 19 (1983).zbMATHGoogle Scholar
  13. 13.
    M.W. Beinker, B.C. Metsch, H.R. Petry, J. Phys. G 22, 1151 (1996).Google Scholar
  14. 14.
    E.V. Shuryak, J.L. Rosner, Phys. Lett. B 218, 72 (1989).CrossRefGoogle Scholar
  15. 15.
    E.V. Shuryak, I. Zahed, hep-ph/0310270.Google Scholar
  16. 16.
    N.I. Kochelev, H.-J. Lee, V. Vento, hep-ph/0404065.Google Scholar

Copyright information

© Springer-Verlag Berlin/Heidelberg 2004

Authors and Affiliations

  1. 1.Service de Physique Générale et de Physique des Particules Élémentaires, Groupe de Physique Nucléaire ThéoriqueUniversité de Mons-HainautMonsBelgium
  2. 2.Laboratoire de Physique Subatomique et de CosmologieGrenoble-CedexFrance

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