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The European Physical Journal A

, Volume 39, Issue 2, pp 149–161 | Cite as

Measurement of beam-recoil observables Ox , Oz and target asymmetry T for the reaction \( \gamma\)p → K+ \( \Lambda\)

  • The GRAAL Collaboration
  • A. LleresEmail author
  • O. Bartalini
  • V. Bellini
  • J. P. Bocquet
  • P. Calvat
  • M. Capogni
  • L. Casano
  • M. Castoldi
  • A. D’Angelo
  • J. -P. Didelez
  • R. Di Salvo
  • A. Fantini
  • D. Franco
  • C. Gaulard
  • G. Gervino
  • F. Ghio
  • B. Girolami
  • A. Giusa
  • M. Guidal
  • E. Hourany
  • R. Kunne
  • V. Kuznetsov
  • A. Lapik
  • P. Levi Sandri
  • F. Mammoliti
  • G. Mandaglio
  • D. Moricciani
  • A. N. Mushkarenkov
  • V. Nedorezov
  • L. Nicoletti
  • C. Perrin
  • C. Randieri
  • D. Rebreyend
  • F. Renard
  • N. Rudnev
  • T. Russew
  • G. Russo
  • C. Schaerf
  • M. -L. Sperduto
  • M. -C. Sutera
  • A. Turinge
  • V. Vegna
Regular Article - Experimental Physics

Abstract

The double polarization (beam-recoil) observables \(\ensuremath O_x\) and \(\ensuremath O_z\) have been measured for the reaction \( \gamma\) pK + \( \Lambda\) from threshold production to \(\ensuremath E_{\gamma} \sim 1500\) MeV. The data were obtained with the linearly polarized beam of the GRAAL facility. Values for the target asymmetry T could also be extracted despite the use of an unpolarized target. Analyses of our results by two isobar models tend to confirm the necessity to include new or poorly known resonances in the 1900MeV mass region.

PACS

13.60.Le Meson production 13.88.+e Polarization in interactions and scattering 25.20.Lj Photoproduction reactions 

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Copyright information

© SIF, Springer-Verlag Berlin Heidelberg 2009

Authors and Affiliations

  • The GRAAL Collaboration
  • A. Lleres
    • 1
    Email author
  • O. Bartalini
    • 2
    • 9
  • V. Bellini
    • 12
    • 5
  • J. P. Bocquet
    • 1
  • P. Calvat
    • 1
  • M. Capogni
    • 2
    • 9
  • L. Casano
    • 9
  • M. Castoldi
    • 7
  • A. D’Angelo
    • 2
    • 9
  • J. -P. Didelez
    • 14
  • R. Di Salvo
    • 9
  • A. Fantini
    • 2
    • 9
  • D. Franco
    • 2
    • 9
  • C. Gaulard
    • 4
  • G. Gervino
    • 3
    • 10
  • F. Ghio
    • 8
    • 11
  • B. Girolami
    • 8
    • 11
  • A. Giusa
    • 12
    • 6
  • M. Guidal
    • 14
  • E. Hourany
    • 14
  • R. Kunne
    • 14
  • V. Kuznetsov
    • 13
    • 16
  • A. Lapik
    • 13
  • P. Levi Sandri
    • 4
  • F. Mammoliti
    • 12
    • 6
  • G. Mandaglio
    • 6
    • 15
  • D. Moricciani
    • 9
  • A. N. Mushkarenkov
    • 13
  • V. Nedorezov
    • 13
  • L. Nicoletti
    • 2
    • 9
    • 1
  • C. Perrin
    • 1
  • C. Randieri
    • 12
    • 5
  • D. Rebreyend
    • 1
  • F. Renard
    • 1
  • N. Rudnev
    • 13
  • T. Russew
    • 1
  • G. Russo
    • 12
    • 6
  • C. Schaerf
    • 2
    • 9
  • M. -L. Sperduto
    • 12
    • 6
  • M. -C. Sutera
    • 6
  • A. Turinge
    • 13
  • V. Vegna
    • 2
    • 9
  1. 1.Institut National Polytechnique de GrenobleLPSC, Université Joseph Fourier Grenoble 1, CNRS/IN2P3GrenobleFrance
  2. 2.Dipartimento di FisicaUniversità di Roma “Tor Vergata”RomaItaly
  3. 3.Dipartimento di Fisica SperimentaleUniversità di TorinoTorinoItaly
  4. 4.Laboratori Nazionali di FrascatiINFNFrascatiItaly
  5. 5.Laboratori Nazionali del SudINFNCataniaItaly
  6. 6.INFN - Sezione di CataniaCataniaItaly
  7. 7.INFN - Sezione di GenovaGenovaItaly
  8. 8.INFN - Sezione di RomaRomaItaly
  9. 9.INFN - Sezione di Roma Tor VergataRomaItaly
  10. 10.INFN - Sezione di TorinoTorinoItaly
  11. 11.Istituto Superiore di SanitàRomaItaly
  12. 12.Dipartimento di Fisica ed AstronomiaUniversità di CataniaCataniaItaly
  13. 13.Institute for Nuclear ResearchMoscowRussia
  14. 14.IPNOUniversité Paris-Sud 11, CNRS/IN2P3OrsayFrance
  15. 15.Dipartimento di FisicaUniversità di MessinaMessinaItaly
  16. 16.Kyungpook National UniversityDaeguRepublic of Korea

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