Low Energy Analyzing Powers in Pion-Proton Elastic Scattering

Abstract

Analyzing powers of pion-proton elastic scattering have been measured at PSI with the Low Energy Pion Spectrometer LEPS as well as 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 pi+ p scattering, and at 67.3 and 87.2 MeV for pi- 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.

15 pages, 4 figures

References in corpus (7)

• Dispersion Relation Constrained Partial Wave Analysis of piN Elastic and piN\to\etaN Scattering Data: The Baryon Spectrum
• Sigma-term physics in the perturbative chiral quark model
• Towards an understanding of isospin violation in pion-nucleon scattering
• Lattice QCD Calculations of the Sigma Commutator
• Precision Pion-Proton Elastic Differential Cross Sections at Energies Spanning the Delta Resonance
• The dependence of the "experimental" pion-nucleon sigma term on higher partial waves
• The Contribution of the Light Quark Condensate to the Pion-Nucleon Sigma Term

Cited by in corpus (13)

• Extended Partial-Wave Analysis of piN Scattering Data
• Chiral Perturbation Theory and Baryon Properties
• Progress Toward Understanding Baryon Resonances
• Light Baryon Spectroscopy
• Phase-shift analysis of low-energy ${\pi }^{\pm }p$ elastic-scattering data
• pi+- p differential cross sections at low energies
• Correlations of $\mathbf{\pi N}$ Partial Waves for Multi-Reaction Analyses
• Pionic charge exchange on the proton from 40 to 250 MeV
• Analysis of the low-energy ${\pi }^{\pm }p$ elastic-scattering data
• Analysis of the low-energy ${\pi }^{-}p$ charge-exchange data
• Baryon polarization in low-energy unpolarized meson-baryon scattering
• Systematic effects in the low-energy behavior of the current SAID solution for the pion-nucleon system
• Absorptive part of meson--baryon scattering amplitude and baryon polarization in chiral perturbation theory