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Measurement of πphotoproduction on the proton from 550 to 1500 MeV at GRAAL

  • O. Bartalini
  • V. Bellini
  • J. P. Bocquet
  • M. Capogni
  • L. Casano
  • M. Castoldi
  • P. Calvat
  • A. D'Angelo
  • R. Di Salvo
  • A. Fantini
  • C. Gaulard
  • G. Gervino
  • F. Ghio
  • B. Girolami
  • A. Giusa
  • V. Kouznetsov
  • A. Lapik
  • P. Levi Sandri
  • A. LleresEmail author
  • D. Moricciani
  • A. N. Mushkarenkov
  • V. Nedorezov
  • L. Nicoletti
  • C. Perrin
  • D. Rebreyend
  • F. Renard
  • N. Rudnev
  • T. Russew
  • G. Russo
  • C. Schaerf
  • M. -L. Sperduto
  • M. -C. Sutera
  • A. Turinge
Original Article

Abstract.

Neutral pion photoproduction has been measured from 550 to 1500 MeV with the GRAAL facility, located at the ESRF in Grenoble. Differential cross-section and beam asymmetry have been measured over a wide angular range. These high-precision data improve significantly the database for the beam asymmetry in the second and third resonance regions covering for the first time the energy domain 1100-1500 MeV. New partial-wave analyses including these data are presented for which the beam asymmetry brings crucial constraints.

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

© Società Italiana di Fisica and Springer-Verlag 2006

Authors and Affiliations

  • O. Bartalini
    • 2
    • 9
  • V. Bellini
    • 1
    • 5
  • J. P. Bocquet
    • 12
  • M. Capogni
    • 2
    • 9
  • L. Casano
    • 9
  • M. Castoldi
    • 7
  • P. Calvat
    • 12
  • A. D'Angelo
    • 2
    • 9
  • R. Di Salvo
    • 9
  • A. Fantini
    • 2
    • 9
  • C. Gaulard
    • 4
  • G. Gervino
    • 3
    • 10
  • F. Ghio
    • 8
    • 11
  • B. Girolami
    • 8
    • 11
  • A. Giusa
    • 1
    • 6
  • V. Kouznetsov
    • 13
  • A. Lapik
    • 13
  • P. Levi Sandri
    • 4
  • A. Lleres
    • 12
    Email author
  • D. Moricciani
    • 9
  • A. N. Mushkarenkov
    • 13
  • V. Nedorezov
    • 13
  • L. Nicoletti
    • 2
    • 9
    • 12
  • C. Perrin
    • 12
  • D. Rebreyend
    • 12
  • F. Renard
    • 12
  • N. Rudnev
    • 13
  • T. Russew
    • 12
  • G. Russo
    • 1
    • 6
  • C. Schaerf
    • 2
    • 9
  • M. -L. Sperduto
    • 1
    • 6
  • M. -C. Sutera
    • 6
  • A. Turinge
    • 13
  1. 1.Dipartimento di Fisica ed AstronomiaUniversità di CataniaCataniaItaly
  2. 2.Dipartimento di FisicaUniversità di Roma “Tor Vergata”RomaItaly
  3. 3.Dipartimento di Fisica SperimentaleUniversità di TorinoTorinoItaly
  4. 4.Laboratori Nazionali di FrascatiINFNFrascati (Roma)Italy
  5. 5.Laboratori Nazionali del SudINFNCataniaItaly
  6. 6.Sezione di CataniaINFNCataniaItaly
  7. 7.Sezione di GenovaINFNGenovaItaly
  8. 8.Sezione di Roma IINFNRomaItaly
  9. 9.Sezione di Roma IIINFNRomaItaly
  10. 10.Sezione di TorinoINFNTorinoItaly
  11. 11.Instituto Superiore di SanitàRomaItaly
  12. 12.Laboratoire de Physique Subatomique et de CosmologieIN2P3GrenobleFrance
  13. 13.Institute for Nuclear ResearchMoscowRussia

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