Experiments with Polarized 3He and Muonic 3He: Pion Elastic Scattering and Muon Capture

  • O. Häusser
Part of the Few-Body Systems book series (FEWBODY, volume 9)


Novel asymmetry measurements on the A=3 system using secondary beams of pions and muons have recently become feasible. Asymmetries A y for π + elastic scattering have been measured for the first time across the P 33 resonance region. The asymmetries are large and change sign between 180 and 256 MeV. The data disagree in detail with calculations that use Faddeev wavefunctions for 3He and first-order optical potentials. Inclusion of a Δ-neutron spin-spin interaction greatly improves the agreement with the data.

Muonic 3He has been polarized on the time scale of the muon lifetime by direct spin exchange with optically pumped Rb vapor. Asymmetries for 1.9 MeV tritons from muon capture have been observed for the first time. With future improvements of the experiment the vector analyzing power for the tritons may provide an accurate and nearly model independent value for the induced pseudoscalar coupling g p of the weak interaction.


Muon Capture Decay Electron Single Particle Wave Function Diode Laser Array Muon Polarization 
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.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    B. Larson et al.: Phys. Rev. A44, 3108 (1991)ADSCrossRefGoogle Scholar
  2. 2.
    R. Tacik et al.: Phys. Rev. Lett. 63, 1784 (1989)ADSCrossRefGoogle Scholar
  3. 3.
    Yi-Fen Yen et al.: Phys. Rev. 66, 1959 (1991)ADSGoogle Scholar
  4. 4.
    J.T. Brack et al.: Phys. Rev. C45, 698 (1992)ADSGoogle Scholar
  5. 5.
    R. Mach and S.S. Kamalov: Nucl. Phys. A511, 601 (1990)CrossRefGoogle Scholar
  6. 6.
    P.B. Siegel and W.R. Gibbs: Phys. Rev. C48, 1939 (1993); Private CommunicationADSGoogle Scholar
  7. 7.
    Yi-Fen Yen et al.: Phys. Rev. C50, 897 (1994)ADSCrossRefGoogle Scholar
  8. 8.
    R.A. Brandenburg, Y.E. Kim, and A. Tubis: Phys. Rev. C12, 1368 (1975)ADSGoogle Scholar
  9. 9.
    J.L. Friar et al.: Phys. Rev. C34, 1463 (1986)ADSGoogle Scholar
  10. 10.
    D.R. Tilley, H.R. Weller, and H.H. Hasan: Nucl. Phys. A474, 2 (1987)Google Scholar
  11. 11.
    B. Larson et al.: Phys. Rev. Lett. 67, 3356 (1991)ADSCrossRefGoogle Scholar
  12. B. Larson et al.: Phys. Rev. C49, 2045 (1994)ADSGoogle Scholar
  13. 12.
    S.S. Kamalov, L. Tiator, and C. Bennhold, Phys. Rev. C47, 941 (1993)ADSGoogle Scholar
  14. C. Bennhold, B.K. Jennings, L. Tiator, and S.S. Kamalov, Nucl. Phys. A540, 621 (1992)CrossRefGoogle Scholar
  15. 13.
    W.J. Cummings et al.: Phys. Rev. A (in press)Google Scholar
  16. 14.
    W.J. Cummings et al.: Nucl. Instr. Meth. A346, 52 (1994)ADSCrossRefGoogle Scholar
  17. 15.
    P.B. Siegel and W.R. Gibbs: Phys. Rev. C48, 1939 (1993); Private CommunicationADSGoogle Scholar
  18. 16.
    S. Chakravarti, C.M. Edwards, D. Dehnhard, and M.A. Franey: Few-Body Systems, Suppl. 5, 267 (1992)Google Scholar
  19. 17.
    B.K. Jennings: Private CommunicationGoogle Scholar
  20. 18.
    V. Bernard, N. Kaiser and Ulf-G. Meissner: Phys. Rev. D50, 6899 (1994)ADSGoogle Scholar
  21. 19.
    G. Bardin et al.: Nucl. Phys. 352, 365 (1981)CrossRefGoogle Scholar
  22. 20.
    M. Hasinoff: Private CommunicationGoogle Scholar
  23. 21.
    C.W. Kim and H. Primakoff: Phys. Rev. B140, 566 (1965)MathSciNetADSCrossRefGoogle Scholar
  24. 22.
    J.G. Congleton and H. Fearing: Nucl. Phys. A552, 534 (1993)CrossRefGoogle Scholar
  25. 23.
    C. Petitjean and J. Deutsch: Private CommunicationGoogle Scholar
  26. 24.
    P.A. Souder et al.: Phys. Rev. A22, 33 (1980)ADSCrossRefGoogle Scholar
  27. 25.
    N.R. Newbury et al.: Phys. Rev. Lett. 69, 391 (1992)ADSCrossRefGoogle Scholar
  28. 26.
    A. Barton et al.: Phys. Rev. Lett. 70, 758 (1993)ADSCrossRefGoogle Scholar

Copyright information

© Springer-Verlag 1995

Authors and Affiliations

  • O. Häusser
    • 1
    • 2
  1. 1.TRIUMFVancouverCanada
  2. 2.Simon Fraser UniversityBurnabyCanada

Personalised recommendations