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

Alekseev, I. G.; Kanavets, V. P.; Morozov, B. V.; Svirida, D. N.; Kruglov, S. P.; Kulbardis, A. A.; Sumachev, V. V.; Arndt, R. A.; Strakovsky, I. I.; Workman, R. L.

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

Authors

Description

Recent measurements of spin-rotation parameters in elastic $π^+ p$ 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