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

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Abstract

The double polarization (beam-recoil) observables \(\ensuremath O_x\) and \(\ensuremath O_z\) have been measured for the reaction \( \gamma\) p → K + \( \Lambda\) 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.

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Authors and Affiliations

  1. Institut National Polytechnique de Grenoble, LPSC, Université Joseph Fourier Grenoble 1, CNRS/IN2P3, 53 avenue des Martyrs, 38026, Grenoble, France

    A. Lleres, J. P. Bocquet, P. Calvat, L. Nicoletti, C. Perrin, D. Rebreyend, F. Renard & T. Russew

  2. Dipartimento di Fisica, Università di Roma “Tor Vergata”, via della Ricerca Scientifica 1, I-00133, Roma, Italy

    O. Bartalini, M. Capogni, A. D’Angelo, A. Fantini, D. Franco, L. Nicoletti, C. Schaerf & V. Vegna

  3. Dipartimento di Fisica Sperimentale, Università di Torino, via P. Giuria, I-00125, Torino, Italy

    G. Gervino

  4. Laboratori Nazionali di Frascati, INFN, via E. Fermi 40, I-00044, Frascati, Italy

    C. Gaulard & P. Levi Sandri

  5. Laboratori Nazionali del Sud, INFN, via Santa Sofia 44, I-95123, Catania, Italy

    V. Bellini & C. Randieri

  6. INFN - Sezione di Catania, via Santa Sofia 64, I-95123, Catania, Italy

    A. Giusa, F. Mammoliti, G. Mandaglio, G. Russo, M. -L. Sperduto & M. -C. Sutera

  7. INFN - Sezione di Genova, via Dodecanneso 33, I-16146, Genova, Italy

    M. Castoldi

  8. INFN - Sezione di Roma, piazzale Aldo Moro 2, I-00185, Roma, Italy

    F. Ghio & B. Girolami

  9. INFN - Sezione di Roma Tor Vergata, via della Ricerca Scientifica 1, I-00133, Roma, Italy

    O. Bartalini, M. Capogni, L. Casano, A. D’Angelo, R. Di Salvo, A. Fantini, D. Franco, D. Moricciani, L. Nicoletti, C. Schaerf & V. Vegna

  10. INFN - Sezione di Torino, I-10125, Torino, Italy

    G. Gervino

  11. Istituto Superiore di Sanità, viale Regina Elena 299, I-00161, Roma, Italy

    F. Ghio & B. Girolami

  12. Dipartimento di Fisica ed Astronomia, Università di Catania, via Santa Sofia 64, I-95123, Catania, Italy

    V. Bellini, A. Giusa, F. Mammoliti, C. Randieri, G. Russo & M. -L. Sperduto

  13. Institute for Nuclear Research, 117312, Moscow, Russia

    V. Kuznetsov, A. Lapik, A. N. Mushkarenkov, V. Nedorezov, N. Rudnev & A. Turinge

  14. IPNO, Université Paris-Sud 11, CNRS/IN2P3, 15 rue Georges Clémenceau, 91406, Orsay, France

    J. -P. Didelez, M. Guidal, E. Hourany & R. Kunne

  15. Dipartimento di Fisica, Università di Messina, salita Sperone, I-98166, Messina, Italy

    G. Mandaglio

  16. Kyungpook National University, 702-701, Daegu, Republic of Korea

    V. Kuznetsov

Authors
  1. A. Lleres
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  2. O. Bartalini
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  3. V. Bellini
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  4. J. P. Bocquet
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  5. P. Calvat
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  6. M. Capogni
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  7. L. Casano
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  8. M. Castoldi
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  9. A. D’Angelo
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  10. J. -P. Didelez
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  11. R. Di Salvo
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  12. A. Fantini
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  13. D. Franco
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  14. C. Gaulard
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  15. G. Gervino
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  16. F. Ghio
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  17. B. Girolami
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  18. A. Giusa
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  19. M. Guidal
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  20. E. Hourany
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  21. R. Kunne
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  22. V. Kuznetsov
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  23. A. Lapik
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  24. P. Levi Sandri
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  25. F. Mammoliti
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  26. G. Mandaglio
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  27. D. Moricciani
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  28. A. N. Mushkarenkov
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  29. V. Nedorezov
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  30. L. Nicoletti
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  31. C. Perrin
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  32. C. Randieri
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  33. D. Rebreyend
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  34. F. Renard
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  35. N. Rudnev
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  36. T. Russew
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  37. G. Russo
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  38. C. Schaerf
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  39. M. -L. Sperduto
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  40. M. -C. Sutera
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  41. A. Turinge
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  42. V. Vegna
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Consortia

The GRAAL Collaboration

Corresponding author

Correspondence to A. Lleres.

Additional information

Z.-E. Meziani

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The GRAAL Collaboration., Lleres, A., Bartalini, O. et al. Measurement of beam-recoil observables Ox , Oz and target asymmetry T for the reaction \( \gamma\)p → K+ \( \Lambda\) . Eur. Phys. J. A 39, 149–161 (2009). https://doi.org/10.1140/epja/i2008-10713-4

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  • DOI: https://doi.org/10.1140/epja/i2008-10713-4

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