Influence of spin-rotation measurements on partial-wave analyses of elastic pion-nucleon scattering

Abstract

Recent measurements of spin-rotation parameters in elastic ${\pi }^{+}p$ scattering are in marked disagreement with predictions of the Carnegie-Mellon$-$Berkeley and Karlsruhe-Helsinki analyses. Using the method of Barrelet, we show how this discrepancy can be removed. We then show how this Barrelet transformation alters the partial-wave amplitudes. The effect of unitarity and analyticity constraints is also considered.

9 pages, 4 figures. Postscript figures also available from ftp://clsaid.phys.vt.edu/pub/said/pin/barrelet

References in corpus (1)

• Updated analysis of $\pi$N elastic scattering data to 2.1~GeV: The Baryon Spectrum

Cited by in corpus (8)

• Extended Partial-Wave Analysis of piN Scattering Data
• Baryon spectroscopy
• Analysis of Pion Photoproduction Data
• Pion- and photo-induced transition amplitudes to $\Lambda K$, $\Sigma K$, and $N\eta$
• P-wave excited baryons from pion- and photo-induced hyperon production
• Model dependence of single-energy fits to pion photoproduction data
• Measurements of spin rotation parameter A in pion-proton elastic scattering at 1.62 GeV/c
• Backward asymmetry measurements in the elastic pion-proton scattering at resonance energies