Relativistic effects in proton-induced deuteron break-up at intermediate energies with forward emission of a fast proton pair

  • L. P. Kaptari
  • B. Kämpfer
  • S. S. Semikh
  • S. M. Dorkin


Recent data of the reaction \(pd \to (pp) n\) with a fast forward pp pair with small excitation energy is analyzed within a covariant approach based on the Bethe-Salpeter formalism. Relativistic effects in cross-section are extracted and found to be large. It is demonstrated that the node of the non-relativistic amplitude is shifted and masked by relativistic effects from Lorentz boost and the negative-energy P components in the 1 S 0 Bethe-Salpeter amplitude of the pp pair.


Excitation Energy Relativistic Effect Intermediate Energy Lorentz Boost Covariant 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.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    S. Kox, E.J. Beise (Spokespersons), TJNAF experiments 94-018, Measurement of the deuteron polarization at large momentum transfers in D(e,e’)D scattering;\_prog; Phys. Rev. Lett. 84, 5053 (2000); Nucl. Phys. A 684, 521 (2001).Google Scholar
  2. 2.
    E. Tomasi-Gustafsson, in Proceedings of the XIV International Seminar On High Energy Physics Problems, Preprint JINR No. E1,2-2000-166 (Dubna, 2000).Google Scholar
  3. 3.
    V.I. Komarov (Spokesman), COSY proposal #20 (updated 1999), Exclusive deuteron break-up study with polarized protons and deuterons at COSY, Proposals.html.Google Scholar
  4. 4.
    V.I. Komarov, Phys. Lett. B 553, 179 (2003).CrossRefGoogle Scholar
  5. 5.
    Yu.N. Uzikov, V.I. Komarov, F. Rathmann, H. Seyfarth, nucl-th/0211001; Yu.N. Uzikov, J. Phys. G 28, B13 (2002).Google Scholar
  6. 6.
    R. Machleidt, Phys. Rev. C 63, 024001 (2001).CrossRefGoogle Scholar
  7. 7.
    J. Haidenbauer, Yu.N. Uzikov, Phys. Lett. B 562, 227 (2003).CrossRefGoogle Scholar
  8. 8.
    L.P. Kaptari, B. Kämpfer, S.M. Dorkin, S.S. Semikh, Few-Body Syst. 27, 189 (1999); Phys. Rev. C 57, 1097 (1998); Phys. Lett. B 404, 8 (1997); L.P. Kaptari, B. Kämpfer, A.Yu. Umnikov, F.C. Khanna, Phys. Lett. B 351, 400 (1995).CrossRefGoogle Scholar
  9. 9.
    V. Abaev, M. Büscher, S. Dymov, M. Hartmann, nucl-ex/0105002.Google Scholar
  10. 10.
    The considered reaction \(p d \to (pp) n\) must not be confused with the charge exchange reaction \(p d \to n (pp)\) with a slow pair in the final state.Google Scholar
  11. 11.
    A.Yu. Umnikov, L.P. Kaptari, F.C. Khanna, Phys. Rev. C 56, 1700 (1997); A.Yu. Umnikov, L.P. Kaptari, K.Yu. Kazakov, F.C. Khanna, Phys. Lett. B 334, 163 (1994); A.Yu. Umnikov, Z. Phys. A 357, 333 (1997).CrossRefGoogle Scholar
  12. 12.
    S.G. Bondarenko, V.V. Burov, M. Beyer, S.M. Dorkin, Phys. Rev. C 58, 3143 (1998).CrossRefGoogle Scholar
  13. 13.
    L.P. Kaptari, B. Kämpfer, S.S. Semikh, S.M. Dorkin, nucl-th/0212062, unpublished.Google Scholar
  14. 14.
    Actually, when one particle is on-mass-shell (the incident proton in our case), only two partial amplitudes differ from zero corresponding to positive values of the \(\rho\) spin of the on-mass-shell particle.Google Scholar
  15. 15.
    L.P. Kaptari, B. Kämpfer, S.S. Semikh, nucl-th/0212066.Google Scholar
  16. 16.
    J. Fleischer, J.A. Tjon, Nucl. Phys. B 84, 375 (1975).CrossRefGoogle Scholar
  17. 17.
    L.P. Kaptari, A.Yu. Umnikov, S.G. Bondarenko, K.Yu. Kazakov, F.C. Khanna, B. Kämpfer, Phys. Rev. C 54, 986 (1996).CrossRefGoogle Scholar
  18. 18.
    C. Ciofi degli Atti, D. Faralli, A.Yu. Umnikov, L.P. Kaptari Phys. Rev. C 60, 034003 (1999).Google Scholar
  19. 19.
    L.P. Kaptari, B. Kämpfer, S.S. Semikh, S.M. Dorkin, Eur. Phys. J. A 17 119, (2003); L.P. Kaptari, B. Kämpfer, S.S. Semikh, S.M. Dorkin, Phys. At. Nucl. 65, 442 (2002).Google Scholar
  20. 20.
    J. Haidenbauer, Y. Koike, W. Plessas, Phys. Rev. C 33, 439 (1986).CrossRefGoogle Scholar
  21. 21.
    V.G.J. Stoks, R.A.M. Klomp, M.C.M. Rentmeester, J.J. de Swart, Phys. Rev. C 48, 792 (1993).CrossRefGoogle Scholar
  22. 22.
    F. Gross, Phys. Rev. 186, 1448 (1969); W.W. Buck, F. Gross, Phys. Rev. C 20, 2361 (1979); F. Gross, J.W. Van Orden, K. Holionde, Phys. Rev. C 45, 2094 (1992); J.W. Van Orden, N. Devine, F. Gross, Phys. Rev. Lett. 75, 4369 (1995).CrossRefGoogle Scholar

Copyright information

© Springer-Verlag Berlin/Heidelberg 2004

Authors and Affiliations

  • L. P. Kaptari
    • 1
  • B. Kämpfer
    • 1
  • S. S. Semikh
    • 1
  • S. M. Dorkin
    • 2
  1. 1.PF 510119Forschungszentrum RossendorfDresdenGermany
  2. 2.Nuclear Physics InstituteMoscow State UniversityMoscowRussia

Personalised recommendations