Advertisement

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

  • C. Semay
  • B. Silvestre-Brac
Letter

Abstract.

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.

Keywords

Elementary Particle Correct Treatment Hamiltonian Approach Diquark Mass Effective Hamiltonian Approach 
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.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  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

Personalised recommendations