APS » PROLA » Phys. Rev. Lett. » Volume 79 » Issue 22

Phys. Rev. Lett. 79, 4337 - 4340 (1997)

N  →Δ Transition from Simultaneous Measurements of p(γ→, π) and p(γ→, γ)

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G. Blanpied et al. (The LEGS Collaboration)
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Received 29 April 1997

New high-precision measurements of p(γ→,π) and p(γ→,γ) cross sections and beam asymmetries have been combined with other polarization ratios in a simultaneous analysis of both reactions. Compton scattering has provided two important new constraints on the photopion amplitude. The E2/M1 mixing ratio for the N→Δ transition extracted from this analysis is [-3.0±0.3(stat+syst)±0.2 (model)]%. Both data and analysis of this work are in conflict with recent results from Mainz.


©1997 The American Physical Society

URL: http://link.aps.org/abstract/PRL/v79/p4337
DOI: 10.1103/PhysRevLett.79.4337
PACS: 14.20.Gk, 11.80.Et, 13.60.Fz, 13.60.Le

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