Semileptonic decays of baryons in a relativistic quark model

Hadron Physics

Abstract.

We calculate semileptonic decays of light and heavy baryons in a relativistically covariant constituent quark model. The model is based on the Bethe-Salpeter equation in instantaneous approximation. It generates satisfactory mass spectra for mesons and baryons up to the highest observable energies. Without introducing additional free parameters we compute on this basis helicity amplitudes of electronic and muonic semileptonic decays of baryons. We thus obtain form factor ratios and decay rates in good agreement with experiment.

PACS.

11.10.St Bound and unstable states; Bethe-Salpeter equations 12.39.Ki Relativistic quark model 13.30.Ce Leptonic, semileptonic, and radiative decays 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    G.'t Hooft, Phys. Rev. D 14, 3432 (1976)CrossRefADSGoogle Scholar
  2. 2.
    M.A. Shifman, A.I. Vainshtein, V.I. Zakharov, Nucl. Phys. B 163, 46 (1980).CrossRefADSGoogle Scholar
  3. 3.
    M. Koll, R. Ricken, D. Merten, B.C. Metsch, H.R. Petry, Eur. Phys. J. A 9, 73 (2000) [arXiv:hep-ph/0008220].CrossRefADSGoogle Scholar
  4. 4.
    R. Ricken, M. Koll, D. Merten, B.C. Metsch, H.R. Petry, Eur. Phys. J. A 9, 221 (2000) [arXiv:hep-ph/0008221].CrossRefADSGoogle Scholar
  5. 5.
    D. Merten, R. Ricken, M. Koll, B. Metsch, H.R. Petry, Eur. Phys. J. A 13, 477 (2002) [arXiv:hep-ph/0104029].ADSGoogle Scholar
  6. 6.
    R. Ricken, M. Koll, D. Merten, B.C. Metsch, Eur. Phys. J. A 18, 667 (2003) [arXiv:hep-ph/0302124].CrossRefADSGoogle Scholar
  7. 7.
    U. Löring, K. Kretzschmar, B.C. Metsch, H.R. Petry, Eur. Phys. J. A 10, 309 (2001) [arXiv:hep-ph/0103287]. CrossRefADSGoogle Scholar
  8. 8.
    U. Löring, B.C. Metsch, H.R. Petry, Eur. Phys. J. A 10, 395 (2001) [arXiv:hep-ph/0103289].CrossRefADSGoogle Scholar
  9. 9.
    U. Löring, B.C. Metsch, H.R. Petry, Eur. Phys. J. A 10, 447 (2001) [arXiv:hep-ph/0103290].CrossRefADSGoogle Scholar
  10. 10.
    D. Merten, U. Löring, K. Kretzschmar, B. Metsch, H.R. Petry, Eur. Phys. J. A 14, 477 (2002) [arXiv:hep-ph/0204024].CrossRefADSGoogle Scholar
  11. 11.
    T. Van Cauteren, J. Ryckebusch, B. Metsch, H.R. Petry, arXiv:nucl-th/0509047.Google Scholar
  12. 12.
    S. Mandelstam, Proc. R. Soc. London, Ser. A 233, 248 (1955).MATHMathSciNetGoogle Scholar
  13. 13.
    J.G. Körner, M. Krämer, Phys. Lett. B 275, 495 (1992).CrossRefADSGoogle Scholar
  14. 14.
    Particle Data Group Collaboration (S. Eidelman), Phys. Lett. B 592, 1 (2004).CrossRefADSGoogle Scholar
  15. 15.
    H. Pietschmann, Weak Interactions - Formulae, Results and Derivations (Springer-Verlag, Wien, 1983) ISBN 3-211-81783-2.Google Scholar
  16. 16.
    A. Kadeer, J.G. Körner, U. Moosbrugger, arXiv:hep-ph/0511019.Google Scholar
  17. 17.
    S. Migura, D. Merten, B. Metsch, H.R. Petry, this issue, p. 41.Google Scholar
  18. 18.
    KTeV Collaboration (A. Alavi-Harati), Phys. Rev. Lett. 87, 132001 (2001) [arXiv:hep-ex/0105016].CrossRefADSGoogle Scholar
  19. 19.
    CLEO Collaboration (J.W. Hinson), Phys. Rev. Lett. 94, 191801 (2005) [arXiv:hep-ex/0501002].CrossRefADSGoogle Scholar
  20. 20.
    CLEO Collaboration (B. Barish), Phys. Rev. D 51, 1014 (1995) [arXiv:hep-ex/9406005].CrossRefADSGoogle Scholar
  21. 21.
    CLEO Collaboration (M. Athanas), Phys. Rev. Lett. 79, 2208 (1997) [arXiv:hep-ex/9705019].CrossRefADSGoogle Scholar
  22. 22.
    Bristol-Geneva-Heidelberg-Orsay-Rutherford-Strasbourg Collaboration (M. Bourquin), Z. Phys. C 12, 307 (1982).CrossRefGoogle Scholar
  23. 23.
    The KTeV E832/E799 Collaboration (A. Affolder), Phys. Rev. Lett. 82, 3751 (1999).CrossRefADSGoogle Scholar
  24. 24.
    KTeV Collaboration (A. Alavi-Harati), Phys. Rev. Lett. 95, 081801 (2005) [arXiv:hep-ex/0504055].CrossRefADSGoogle Scholar

Copyright information

© Società Italiana di Fisica and Springer-Verlag 2006

Authors and Affiliations

  • S. Migura
    • 1
  • D. Merten
    • 1
  • B. Metsch
    • 1
  • H. -R. Petry
    • 1
  1. 1.Helmholtz-Institut für Strahlen- und KernphysikBonnGermany

Personalised recommendations