Analyzing Power for $\pi^- P$ Elastic Scattering in the Energy Region of the Roper Resonance

Mokhtari, A.; Briscoe, W.J.; Eichon, A.D.; Fitzgerald, D.H.; Kim, G.J.; Nefkens, B.M.K.; Wightman, J.A.; Sadler, M.E.

doi:10.1103/PhysRevD.33.296

Analyzing Power for $\pi^- P$ Elastic Scattering in the Energy Region of the Roper Resonance

1986

4 pages

Published in:

Phys.Rev.D 33 (1986) 296-299

DOI:

10.1103/PhysRevD.33.296

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Abstract: (APS)

High-precision measurements of the analyzing power AN in π−p elastic scattering at pπ=471–687 MeV/c are presented and compared with the results of recent πN partial-wave analyses (PWA’s) by the Karlsruhe-Helsinki, CMU-LBL, and VPI groups. While agreeing with the main features of the measured angular dependence of AN, the three PWA’s yield larger values than the measurements at forward angles at pπ=471, 547, and 625 MeV/c. At 687 MeV/c the PWA’s do not agree with the data at far backward angles. We estimate the effect of our data on the phase shifts in this energy region, which includes the Roper resonance.

PI- P: ELASTIC SCATTERING
ELASTIC SCATTERING: PI- P
POLARIZATION: ANALYZING POWER
ANALYZING POWER: POLARIZATION
POLARIZED TARGET: TRANSVERSE
TRANSVERSE: POLARIZED TARGET
N(1440)
PARTIAL WAVE ANALYSIS
ANGULAR DEPENDENCE
EXPERIMENTAL RESULTS

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Analyzing Power for π−P\pi^- Pπ−P Elastic Scattering in the Energy Region of the Roper Resonance

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Analyzing Power for $\pi^- P$ Elastic Scattering in the Energy Region of the Roper Resonance