Low energy analyzing powers in pion-proton elastic scattering

R. Meier, M. Cröni, R. Bilger, B. Van Den Brandt, J. Breitschopf, H. Clement, J. R. Comfort, H. Denz, A. Erhardt, K. Föhl, E. Friedman, J. Gräter, P. Hautle, G. J. Hofman, J. A. Konter, S. Mango, J. Pätzold, M. M. Pavan, G. J. Wagner, F. Von Wrochem

Research output: Contribution to journalArticlepeer-review

13 Scopus citations


Analyzing powers of pion-proton elastic scattering have been measured at PSI with the Low Energy Pion Spectrometer LEPS and a novel polarized scintillator target. Angular distributions between 40 and 120 deg (c.m.) were taken at 45.2, 51.2, 57.2, 68.5, 77.2, and 87.2 MeV incoming pion kinetic energy for π+p scattering, and at 67.3 and 87.2 MeV for π-p scattering. These new measurements constitute a substantial extension of the polarization data base at low energies. Predictions from phase shift analyses are compared with the experimental results, and deviations are observed at low energies.

Original languageEnglish (US)
Pages (from-to)155-162
Number of pages8
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number3-4
StatePublished - May 27 2004


  • 13.75.Gx
  • 24.70.+s
  • 25.80.Dj
  • Active polarized target
  • Pion-proton scattering
  • Sigma term

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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