Measurement of the G asymmetry for the γp↦Nπ channels in the Δ(1232) resonance region

  • J. Ahrens
  • S. Altieri
  • J. R. M. Annand
  • H. -J. Arends
  • R. Beck
  • A. Braghieri
  • N. d'Hose
  • H. Dutz
  • S. Goertz
  • P. Grabmayr
  • S. Hasegawa
  • E. Heid
  • H. Holvoet
  • L. Van Hoorebeke
  • N. Horikawa
  • T. Iwata
  • O. Jahn
  • P. Jennewein
  • R. Kondratiev
  • J. Krimmer
  • M. Lang
  • B. Lannoy
  • K. Livingston
  • J. C. McGeorge
  • W. Meyer
  • A. Panzeri
  • P. Pedroni
  • T. Pinelli
  • I. Preobrajenski
  • G. Reicherz
  • G. Rosner
  • M. Rost
  • T. Rostomyan
  • D. Ryckbosch
  • M. Schumacher
  • B. Seitz
  • G. Tamas
  • A. Thomas
  • R. van de Vyver
  • Th. Walcher
  • F. Zapadtka
Original Article

Abstract.

The G asymmetry of the γpNπ reaction has been measured for the first time for Eγ = 340±14 MeV. This observable, for which very scarce published data exist, plays an important role to disentangle the contributions of the various nucleon resonances. The experiment, performed at the Mainz microtron MAMI, used a 4π-detector system, a linearly polarized, tagged photon beam, and a longitudinally polarized proton target.

PACS.

13.60.Le Meson production 14.20.Gk Baryon resonances with S = 0 25.20.Lj Photoproduction reactions 

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Copyright information

© Società Italiana di Fisica and Springer-Verlag 2005

Authors and Affiliations

  • J. Ahrens
    • 7
  • S. Altieri
    • 11
    • 12
  • J. R. M. Annand
    • 5
  • H. -J. Arends
    • 7
  • R. Beck
    • 7
  • A. Braghieri
    • 11
  • N. d'Hose
    • 4
  • H. Dutz
    • 2
  • S. Goertz
    • 1
  • P. Grabmayr
    • 13
  • S. Hasegawa
    • 10
  • E. Heid
    • 7
  • H. Holvoet
    • 3
  • L. Van Hoorebeke
    • 3
  • N. Horikawa
    • 10
  • T. Iwata
    • 9
  • O. Jahn
    • 7
  • P. Jennewein
    • 7
  • R. Kondratiev
    • 8
  • J. Krimmer
    • 13
  • M. Lang
    • 7
  • B. Lannoy
    • 3
  • K. Livingston
    • 5
  • J. C. McGeorge
    • 5
  • W. Meyer
    • 1
  • A. Panzeri
    • 11
    • 12
  • P. Pedroni
    • 11
  • T. Pinelli
    • 11
    • 12
  • I. Preobrajenski
    • 7
    • 8
  • G. Reicherz
    • 1
  • G. Rosner
    • 5
  • M. Rost
    • 7
  • T. Rostomyan
    • 3
  • D. Ryckbosch
    • 3
  • M. Schumacher
    • 6
  • B. Seitz
    • 6
  • G. Tamas
    • 7
  • A. Thomas
    • 7
  • R. van de Vyver
    • 3
  • Th. Walcher
    • 7
  • F. Zapadtka
    • 6
  1. 1.Institut für ExperimentalphysikRuhr-Universität BochumBochumGermany
  2. 2.Physikalisches InstitutUniversität BonnBonnGermany
  3. 3.Subatomaire en StralingsfysicaUniversiteit GentGentBelgium
  4. 4.CEA Saclay, DSM/DAPNIA/SPhNGif-sur-Yvette CedexFrance
  5. 5.Department of Physics and AstronomyUniversity of GlasgowGlasgowUK
  6. 6.II. Physikalisches InstitutUniversität GöttingenGöttingenGermany
  7. 7.Institut für KernphysikUniversität MainzMainzGermany
  8. 8.INR, Academy of ScienceMoscowRussia
  9. 9.Department of PhysicsNagoya UniversityNagoyaJapan
  10. 10.CIRSENagoya UniversityNagoyaJapan
  11. 11.INFN, Sezione di PaviaPaviaItaly
  12. 12.Dipartimento di Fisica Nucleare e TeoricaUniversità di PaviaPaviaItaly
  13. 13.Physikalisches InstitutUniversität TübingenTübingenGermany

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