Measurement of the asymmetries in 3\( \overrightarrow{\sf He}\)(¯e, ep)d and 3\( \overrightarrow{\sf He}\)(¯e, ep)np

  • The A1 Collaboration
  • P. Achenbach
  • D. Baumann
  • R. Böhm
  • B. Boillat
  • D. Bosnar
  • C. Carasco
  • M. Ding
  • M. O. Distler
  • J. Friedrich
  • W. Glöckle
  • J. Golak
  • Y. Goussev
  • P. Grabmayr
  • W. Heil
  • A. Hügli
  • P. Jennewein
  • G. Jover Ma nas
  • J. Jourdan
  • H. Kamada
  • T. Klechneva
  • B. Krusche
  • K. W. Krygier
  • J. G. Llongo
  • M. Lloyd
  • M. Makek
  • H. Merkel
  • C. Micheli
  • U. Müller
  • A. Nogga
  • R. Neuhausen
  • Ch. Normand
  • L. Nungesser
  • A. Ott
  • E. Otten
  • F. Parpan
  • R. Pérez Benito
  • M. Potokar
  • D. Rohe
  • D. Rudersdorf
  • J. Schmiedeskamp
  • M. Seimetz
  • I. Sick
  • S. Širca
  • R. Skibiński
  • S. Stave
  • G. Testa
  • R. Trojer
  • Th. Walcher
  • M. Weis
  • H. Witała
  • H. Wöhrle
Original Article

Abstract.

The electron target asymmetries A || and A with target spin parallel and perpendicular to the momentum transfer \(\ensuremath{\boldsymbol{q}}\) were measured for both the two- and three-body breakup of 3He in the 3\( \overrightarrow{\rm He}\)e, e’p)-reaction. Polarized electrons were scattered off polarized 3He in the quasielastic regime in parallel kinematics with the scattered electron and the knocked-out proton detected using the Three-Spectrometer Facility at MAMI. The results are compared to Faddeev calculations which take into account Final-State Interactions as well as Meson Exchange Currents. The experiment confirms the prediction of a large effect of Final-State Interactions in the asymmetry of the three-body breakup and of an almost negligible one for the two-body breakup.

PACS.

13.88.+e Polarization in interactions and scattering 25.70.Bc Elastic and quasielastic scattering 25.60.Gc Breakup and momentum distributions 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    J.M. Laget, Phys. Lett. B 273, 367 (1991).CrossRefGoogle Scholar
  2. 2.
    J.M. Laget, Phys. Lett. B 276, 398 (1992).CrossRefGoogle Scholar
  3. 3.
    J. Golak , Phys. Rev. C 65, 064004 (2002).CrossRefGoogle Scholar
  4. 4.
    R.W. Schulze, P.U. Sauer, Phys. Rev. C 48, 38 (1993).CrossRefGoogle Scholar
  5. 5.
    C. Carasco , Phys. Lett. B 559, 41 (2003).CrossRefGoogle Scholar
  6. 6.
    A. Nogga , Phys. Rev. C 67, 034004 (2003) and references therein.CrossRefGoogle Scholar
  7. 7.
    H. Witała, W. Glöckle, D. Hüber, J. Golak, H. Kamada, Phys. Rev. Lett. 81, 1183 (1998).CrossRefGoogle Scholar
  8. 8.
    J. Kuroś-Żołnier\-czuk , Phys. Rev. C 66, 024003Google Scholar
  9. 9.
    E. Epelbaum , Phys. Rev. C 66, 064001 (2002).CrossRefGoogle Scholar
  10. 10.
    R. Skibiński , Phys. Rev. C 67, 054001 (2003).CrossRefGoogle Scholar
  11. 11.
    R. Skibiński , Phys. Rev. C 67, 054002 (2003).CrossRefGoogle Scholar
  12. 12.
    B. Blankleider, R.M. Woloshyn, Phys. Rev. C 29, 538 (1984).CrossRefGoogle Scholar
  13. 13.
    H. Gao , Phys. Rev. C 50, R546 (1994).Google Scholar
  14. 14.
    W. Xu , Phys. Rev. Lett. 85, 2900 (2000).CrossRefPubMedGoogle Scholar
  15. 15.
    W. Xu , Phys. Rev. C 67, 012201(R) (2003).CrossRefGoogle Scholar
  16. 16.
    M. Meyerhoff , Phys. Lett. B 327, 201 (1994).CrossRefGoogle Scholar
  17. 17.
    J. Becker , Eur. Phys. J. A 6, 329 (1999).Google Scholar
  18. 18.
    J. Golak , Phys. Rev. C 63, 034006 (2001).CrossRefGoogle Scholar
  19. 19.
    D. Rohe , Phys. Rev. Lett. 83, 4257 (1999).CrossRefGoogle Scholar
  20. 20.
    J. Bermuth , Phys. Lett. B 564, 199 (2003).CrossRefGoogle Scholar
  21. 21.
    F. Xiong , Phys. Rev. Lett. 87, 242501 (2001).CrossRefPubMedGoogle Scholar
  22. 22.
    D. Rohe, W. Heil, M.O. Distler (spokespersons), MAMI-Proposal A1/2-00, 2000.Google Scholar
  23. 23.
    M. Ericson, N. Lo Judice, Nucl. Phys. A 475, 199 (1987).CrossRefGoogle Scholar
  24. 24.
    K.I. Blomqvist , Nucl. Instrum. Methods A 403, 263 (1998).Google Scholar
  25. 25.
    K. Aulenbacher , Nucl. Instrum. Methods A 391, 498 (1997).Google Scholar
  26. 26.
    E.W. Otten, Europhys. News 35, 16 (2004).Google Scholar
  27. 27.
    T.E. Chupp , Phys. Rev. C 45, 915 (1992).CrossRefGoogle Scholar
  28. 28.
    N.R. Newbury , Phys. Rev. A 48, 4411 (1993).CrossRefPubMedGoogle Scholar
  29. 29.
    E. Wilms , Nucl. Instrum. Methods A 401, 491 (1997).Google Scholar
  30. 30.
    S. Baeßler, private communication.Google Scholar
  31. 31.
    R.E.J. Florizone , Phys. Rev. Lett. 83, 2308 (1999).CrossRefGoogle Scholar
  32. 32.
    A.E.L. Dieperink, T. DeForest, I. Sick, R.A. Brandenburg, Phys. Lett. B 63, 261 (1976).CrossRefGoogle Scholar
  33. 33.
    R.G. Milner , Phys. Lett. B 379, 67 (1996).CrossRefGoogle Scholar
  34. 34.
    S. Nagorny, W. Turchinetz, Phys. Lett. B 389, 429 (1996)CrossRefGoogle Scholar

Copyright information

© Società Italiana di Fisica and Springer-Verlag 2005

Authors and Affiliations

  • The A1 Collaboration
  • P. Achenbach
    • 1
  • D. Baumann
    • 1
  • R. Böhm
    • 1
  • B. Boillat
    • 2
  • D. Bosnar
    • 3
  • C. Carasco
    • 2
  • M. Ding
    • 1
  • M. O. Distler
    • 1
  • J. Friedrich
    • 1
  • W. Glöckle
    • 4
  • J. Golak
    • 5
  • Y. Goussev
    • 1
    • 7
  • P. Grabmayr
    • 6
  • W. Heil
    • 7
  • A. Hügli
    • 2
  • P. Jennewein
    • 1
  • G. Jover Ma nas
    • 1
  • J. Jourdan
    • 2
  • H. Kamada
    • 8
  • T. Klechneva
    • 2
  • B. Krusche
    • 2
  • K. W. Krygier
    • 1
  • J. G. Llongo
    • 1
  • M. Lloyd
    • 1
  • M. Makek
    • 3
  • H. Merkel
    • 1
  • C. Micheli
    • 6
  • U. Müller
    • 1
  • A. Nogga
    • 9
  • R. Neuhausen
    • 1
  • Ch. Normand
    • 2
  • L. Nungesser
    • 1
  • A. Ott
    • 2
    • 6
  • E. Otten
    • 7
  • F. Parpan
    • 2
  • R. Pérez Benito
    • 1
  • M. Potokar
    • 10
  • D. Rohe
    • 2
  • D. Rudersdorf
    • 7
  • J. Schmiedeskamp
    • 7
  • M. Seimetz
    • 1
  • I. Sick
    • 2
  • S. Širca
    • 10
  • R. Skibiński
    • 5
  • S. Stave
    • 11
  • G. Testa
    • 2
  • R. Trojer
    • 2
  • Th. Walcher
    • 1
  • M. Weis
    • 1
  • H. Witała
    • 5
  • H. Wöhrle
    • 2
  1. 1.Institut für KernphysikJohannes Gutenberg-Universität MainzMainzGermany
  2. 2.Departement für Physik und AstronomieUniversität BaselBaselSwitzerland
  3. 3.Department of PhysicsUniversity of ZagrebZagrebCroatia
  4. 4.Institut für Theoretische Physik IIRuhr-Universität BochumBochumGermany
  5. 5.M. Smoluchowski Institute of PhysicsJagiellonian UniversityKrakówPoland
  6. 6.Physikalisches InstitutUniversität TübingenTübingenGermany
  7. 7.Institut für PhysikJohannes Gutenberg-UniversitätMainzGermany
  8. 8.Department of Physics, Faculty of EngineeringKyushu Institute of TechnologyKitakyushuJapan
  9. 9.Forschungszentrum JülichInstitut für Theoretische KernphysikJülichGermany
  10. 10.Institute Jožef StefanUniversity of LjubljanaLjubljanaSlovenia
  11. 11.Laboratory for Nuclear ScienceMassachusetts Institute of TechnologyCambridgeUSA

Personalised recommendations