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The European Physical Journal A

, Volume 39, Issue 2, pp 163–168 | Cite as

Backward asymmetry measurements in the elastic pion-proton scattering at resonance energies

  • I. G. Alekseev
  • N. A. Bazhanov
  • Yu. A. Beloglazov
  • P. E. Budkovsky
  • E. I. Bunyatova
  • E. A. Filimonov
  • V. P. Kanavets
  • A. I. Kovalev
  • L. I. Koroleva
  • B. V. Morozov
  • V. M. Nesterov
  • D. V. Novinsky
  • V. V. Ryltsov
  • V. A. Shchedrov
  • A. D. Sulimov
  • V. V. Sumachev
  • D. N. Svirida
  • V. Yu. Trautman
  • L. S. Zolin
Regular Article - Experimental Physics

Abstract

The asymmetry parameter P was measured for the elastic pion-proton scattering in the very backward angular region of \( \theta_{{\rm CM}}^{}\) \( \approx\) 150 - 170° at several pion beam energies in the invariant-mass range containing most of the pion-proton resonances. The general goal of the experimental program was to provide new data for partial wave analyses in order to resolve their uncertainties in the baryon resonance region to allow the unambiguous baryon spectrum reconstructions. Until recently the parameter P was not measured in the examined domain that might be explained by the extremely low cross-section. At the same time the predictions of various partial wave analyses are far from agreement in some kinematic areas and specifically those areas were chosen for the measurements where the disagreement is most pronouncing. The experiment was performed at the ITEP U-10 proton synchrotron, Moscow, by the ITEP-PNPI Collaboration in the latest 5 years.

PACS

13.88.+e Polarization in interactions and scattering 13.75.Gx Pion-baryon interactions 

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References

  1. 1.
    G. Höehler, Handbook of Pion Nucleon Scattering, Physics Data, No. 12-1 (Fachinformationzentrum, Karlsruhe, 1979).Google Scholar
  2. 2.
    G. Höehler, $\pi N$-Newslett. 9, 1 (1993).Google Scholar
  3. 3.
    R.E. Cutcosky, Phys. Rev. D 20, 2839 (1979).Google Scholar
  4. 4.
    R.A. Arndt, Phys. Rev. C 52, 2120 (1995).Google Scholar
  5. 5.
    R.A. Arndt, Phys. Rev. C 69, 035213 (2004)Google Scholar
  6. 6.
    R.A. Arndt, Int. J. Mod. Phys. A 18, 449 (2003)Google Scholar
  7. 7.
    I.G. Alekseev, Phys. Rev. C 55, 2049 (1997).Google Scholar
  8. 8.
    Yu.A. Beloglazov, Instrum. Exp. Tech. 47, 744 (2005).Google Scholar
  9. 9.
    E.I. Bunyatova, Preprint LNPI-1191 (LNPI, Leningrad, 1986).Google Scholar
  10. 10.
    Yu.K. Akimov, Instrum. Exp. Tech. 45, 634 (2005).Google Scholar
  11. 11.
    I.G. Alekseev, Nucl. Phys. B 348, 257 (1991).Google Scholar
  12. 12.
    M.G. Albrow, Nucl. Phys. B 37, 594 (1972).Google Scholar
  13. 13.
    D. Hill, Phys. Rev. Lett. 27, 1241 (1971).Google Scholar
  14. 14.
    E. Barrelet, Nuovo Cimento A 8, 331 (1972).Google Scholar
  15. 15.
    J.E. Martin, Nucl. Phys. B 89, 253 (1975).Google Scholar
  16. 16.
    M.G. Albrow, Nucl. Phys. B 25, 9 (1970).Google Scholar
  17. 17.
    R.D. Eandi, Phys. Rev. 136, B536 (1964).Google Scholar
  18. 18.
    G. Burleson, Phys. Rev. Lett. 26, 338 (1971).Google Scholar

Copyright information

© SIF, Springer-Verlag Berlin Heidelberg 2009

Authors and Affiliations

  • I. G. Alekseev
    • 1
  • N. A. Bazhanov
    • 2
  • Yu. A. Beloglazov
    • 3
  • P. E. Budkovsky
    • 1
  • E. I. Bunyatova
    • 2
  • E. A. Filimonov
    • 3
  • V. P. Kanavets
    • 1
  • A. I. Kovalev
    • 3
  • L. I. Koroleva
    • 1
  • B. V. Morozov
    • 1
  • V. M. Nesterov
    • 1
  • D. V. Novinsky
    • 3
  • V. V. Ryltsov
    • 1
  • V. A. Shchedrov
    • 3
  • A. D. Sulimov
    • 1
  • V. V. Sumachev
    • 3
  • D. N. Svirida
    • 1
  • V. Yu. Trautman
    • 3
  • L. S. Zolin
    • 2
  1. 1.Institute for Theoretical and Experimental PhysicsMoscowRussia
  2. 2.Joint Institute for Nuclear ResearchDubna, Moscow areaRussia
  3. 3.Petersburg Nuclear Physics InstituteGatchina, Leningrad districtRussia

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