Tensor Analyzing Power in <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>π</mi><mi>d</mi></math></span> Elastic Scattering

G. R. Smith; A. Altman; P. Delheij; D. R. Gill; D. Healey; R. R. Johnson; G. Jones; D. Ottewell; F. M. Rozon; M. E. Sevior; F. Tervisidis; R. P. Trelle; G. D. Wait; P. Walden; E. L. Mathie; G. J. Lolos; S. I. H. Naqvi; E. T. Boschitz; C. R. Ottermann; G. S. Kyle; P. A. Amaudruz

doi:10.1103/PhysRevLett.57.803

Tensor Analyzing Power in $π d$ Elastic Scattering

G. R. Smith, A. Altman, P. Delheij, D. R. Gill, D. Healey, R. R. Johnson, G. Jones, D. Ottewell, F. M. Rozon, M. E. Sevior, F. Tervisidis, R. P. Trelle, G. D. Wait, P. Walden, E. L. Mathie, G. J. Lolos, S. I. H. Naqvi, E. T. Boschitz, C. R. Ottermann, G. S. Kyle, and P. A. Amaudruz

Phys. Rev. Lett. 57, 803 – Published 18 August 1986

Abstract

A tensor-polarized deuteron target has been employed for the first measurements of the tensor analyzing power $T_{20}$ in $π d$ elastic scattering. Data at six angles were measured at pion bombarding energies of 133.8 and 150.9 MeV. The results settle a long-standing controversy over conflicting measurements of the tensor polarization $t_{20}$ , and dispute evidence for dibaryon resonances predicated on one of these $t_{20}$ measurements. The data are shown to be in reasonable agreement with recent Faddeev calculations which have reduced contributions from pion absorption.